Using principles in Physics the way in which air bags can reduce the chance of death or injury is that the airbag increases the time over which the velocity of the head changes so that the acceleration is reduced, and thus the force is reduced.
What is an Airbag?This is referred to as a vehicle occupant-restraint system using a bag designed to inflate extremely quickly, then quickly deflate during a collision.
The gas in the bag can only leave at a certain rate which makes it deflates slowly, and the time duration of the deceleration increases which therefore leads to the force being reduced during a collission and reduces the risk of injury.
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to an inhabitant of a planet orbiting merak, how many degrees apart in the sky would alkaid and our sun be?
To an inhabitant of a planet orbiting Merak, 29 degrees apart in the sky would Alkaid and our sun be.
Merak II, a planet orbiting Merak, was practically ruined by a plant plague in the classic Star Trek series episode "The Cloud Minders," which also featured the star Merak. Merak is located in the Nyera Ama Ri valley at an elevation of roughly 3400–3500 metres above sea level.
The distance between the Sun and Alkaid, a blue main-sequence star of the spectral classification B3 V, is approximately 103.9 light-years (31.9 parsecs). The third brightest star in the constellation of Ursa Major, the celestial Great Bear, is Alkaid, also referred to as Eta Ursae Majoris.
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Harold uses an inclined plane to move a washing machine from the sidewalk into his house. The vertical distance from the sidewalk to the house is 0.8 meters. If the plane has a mechanical advantage of 2.3, how long is the plane?
A) 0.35 m
B) 3.1 m
C) 1.5 m
D) 1.84 m
Answer:
D) 1.84 m
Explanation:
You want to know the length of an inclined plane that offers a mechanical advantage of 2.3 when moving a washing machine a height of 0.8 meters.
Mechanical advantageA simple machine offers a mechanical advantage when it trades distance for force. In general, the amount of work required remains the same.
The force required is reduced by a factor of the mechanical advantage, while the distance over which that force is applied is increased by the same factor.
The length of the plane is 2.3×0.8 m = ...
D) 1.84 m
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two particles, an electron and a proton, are initially at rest in a uniform electric field of magnitude 468 n/c. if the particles are free to move, what are their speeds (in m/s) after 48.8 ns?
A homogeneous electrostatic force of strength 564 N/C is initially present around two substances, an electrons and a proton. if the atoms and molecules are unrestrained.
When both a proton and an electron are inserted into an electric?According to our inquiry, a electron as well as a proton will attract one another with a electrical force of equal strength when they are placed in a magnetic field because of their opposing polarities. However, because of their opposing charges, the force will act in the opposite direction.
Are neutrons simply the sum of protons and electrons?Proton, electron, and an antineutrino do not make up a neutron. These particles are simply byproducts of its decay. One up quark, two down quarks, and numerous "intermediary particles" known as gluons, that carry a interaction between the quarks, make up a neutron.
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a solar cell with a reverse saturation current of 1na has a solar current of 1.1 a. compute the maximum output power of the cell per unit of thermal voltage.
0.433 ohms the maximum output power of the cell per unit of thermal voltage.
The relation between saturation current ,solar current and maximum output power per unit of thermal voltage is given below
[tex](1+\frac{V_{max}}{V_{T}})e^{\frac{V_{max}}{V_{T}}}=\frac{I_{s}+I_{o}}{I_{o}}[/tex]
[tex]I_{s} = solar \: \: current,\: \: I_{o}=reverse \: \: saturation\: \: current[/tex]
Id= (1 x 10⁻⁹)(e¹⁷⁸⁸ – 1) = 58.24 mA
IL = IS – ID = 1.1 A – 58.24 mA = 1.042 A.
VmaxP = K*VT = 17.88 kT/q
RL = VmaxP/ID = (17.88/1042)kT/q = 17.16 kT/q
At 20oC, kT/q = 25.25 mV, hence RL = 0.433 ohms. Load Resistance
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Many drugs under development are delivered by nanoparticles in the bloodstream. To monitor changes in the nanoparticles, investigators can retrieve them from the blood by using a device with electrodes that apply oscillating electric fields. The nanoparticles, which are electrically conducting, are strongly attracted to the nearest electrode, while blood cells, which are poor conductors, experience only a weak force toward the nearest electrode, and suspended ions in the blood experience no net force. Explain why the conducting nanoparticles are strongly attracted to the electrodes while other components of the blood are not
The conducting nanoparticles are strongly attracted to the electrodes because they are affected by the oscillating electric fields due to their electrical conductivity, while the other components of the blood, such as blood cells and ions, experience only a weak or no force due to their poor conductivity or lack of charge.
How do nanoparticles interact with the immune system?Nanoparticles can interact with the immune system in various ways. They can be engulfed by immune cells, such as macrophages, which can then present antigens to other immune cells, triggering an immune response. They can also evade detection by the immune system by escaping from phagocytic cells or by disguising themselves as host molecules. Additionally, the size, surface chemistry, and shape of nanoparticles can affect how they interact with immune cells, influencing the type of immune response they elicit. Some nanoparticles may also have immunomodulatory properties, meaning they can modulate the immune response in a desired way.
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if a car has a mass of 1,000 kg that is evenly distributed to its four tires, how much force does each tire apply to the road?
if a car has a mass of 1,000 kg that is evenly distributed to its four tires, force each tire apply to the road is 2450 N.
A force is not something an object "has in it" or that it "contains." One thing experiences a force from another. There are both living things and non-living objects in the concept of a force.
To calculate the weight of the car.
Weight = Mass x Acceleration due to gravity
Weight = 1000 kg x 9.8 m/s2
Weight = 9800 N
Divide the weight of the car by 4, to get the force each tire applies to the road
Force = Weight ÷ 4
Force = 9800 N ÷ 4
Force = 2450N
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a certain substance strongly absorbs infrared light having a wavelengh of 6.50 what is the frequency in hertz of this liggt socratic.org
The frequency of the infrared light is 4.6 × 10¹² Hz. The result is obtained by using the formula for frequency.
What is the formula for the frequency of a light?The formula for the frequency of a light is
f = c/λ
Where
f = frequency (Hz)c = speed of light (3 × 10⁸ m/s)λ wavelength (m)Infrared light is the band of the electromagnetic radiation spectrum with the wavelength between 780 nm to 1.300 nm.
When it is converted to mm, it would be
0.70 mm - 1.3 mm
An infrared light has a wavelength of 6.5 × 10⁻⁵ m. (The most possible unit).
The frequency would be
f = c/λ
f = (3 × 10⁸)/(6.5 × 10⁻⁵)
f = (3 × 10⁸)/(6.5 × 10⁻⁵)
f = 0.46 × 10¹³ Hz
f = 4.6 × 10¹² Hz
Hence, the frequency of the infrared light is 4.6 × 10¹² Hz.
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true or false: the first law of thermodynamics states firmly that energy is a thermodynamic property.
The given statement 'The first law of thermodynamics states firmly that energy is a thermodynamic property' is a true statement because conservation of energy takes place.
Just like mass, energy is always conserved i.e, it can only be changed from one form to another; it cannot be created or destroyed. The term internal energy refers to the kinetic and potential energy that is associated with the system's molecules and is defined as a thermodynamic feature of the system.
Numerous energy transfers and conversions occur after any change in a system caused by the interaction of heat, work, and internal energy. However, there is no net change in the total amount of energy during these exchanges.
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A projectile is fired with an initial speed of 250 m/s at an angle of 42° above the
horizontal
a. Determine the total time in the air.
b. Determine the maximum height reached by the projectile.
c. Determine the maximum horizontal distance covered by the projectile.
d. Determine the velocity of the projectile 5 s after firing.
a) The total time in air is 34.1 s
b) The maximum height is 1428 m
c) The horizontal distance is 6343 m
d) The velocity after 5 s is 299 m/s
What is the projectile?Let us note that the projectile has to do with any object that is moving along a parabolic path.
a) Time of flight = 2usinθ/g
u = initial velocity
g = acceleration due to gravity
θ = angle of projection
T = 2 * 250 sin 42/9.8
= 34.1 s
b) H = v^2sin^2θ/2g
H = (250)^2 sin^2(42)/2(9.8)
H = 27983/19.6
H = 1428 m
c) R = v^2 sin2θ/g
R = (250)^2sin 2(42)/9.8
R = 6343 m
d) v = u + gt
v = 250 + (9.8 * 5)
v = 299 m/s
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a stone is thrown vertically up with a speed of 14 m/s, and at that moment it had 37 j of kinetic energy. what was the mass of the stone?
The mass of the stone is 0.38 kg. The result is obtained by using the formula for kinetic energy.
What is kinetic energy?Kinetic energy is the energy of an object due to its motion. The kinetic energy can be expressed as
KE = ½ mv²
Where
KE = kinetic energy (J)m = mass of object (kg)v = velocity of object (m/s)A stone is thrown vertically up. It has
Speed, v = 14 m/sKinetic energy, KE = 37 JFind the mass of the stone!
Using the formula for kinetic energy, we will get the mass.
KE = ½ mv²
37 = ½ m(14)²
37 = ½ m(196)
37 = 98m
m = 0.38 kg
Hence, the stone has a mass of 0.38 kg.
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How do you improve the existence of the energy?
ASAP PLS
Answer:
Energy exists in how objects interact with each other. Often energy can only be indirectly observed - by observing the processes that happen within a system.
Explanation:
For example: person A drops a rubber ball on the floor and it bounces back to them.
As it's falling you are creating gravitational energy and turning that into the energy of motion: kinetic energy.
a ball player catches a ball 3.46 ss after throwing it vertically upward. part a with what speed did he throw it?
The initial velocity of the ball would be 14.7 m/s.
What is initial velocity?Initial velocity is the speed and direction of an object at the start of its motion. It is a vector quantity, meaning it has both magnitude (the speed) and direction. Initial velocity is usually denoted by the letter v, with an arrow above it to indicate its direction.
The speed with which the ball player threw the ball can be calculated using the equation v = √2gh,
where v is the initial velocity,
g is the acceleration due to gravity (9.8 m/s2), and
h is the height from which the ball was thrown.
In this case, h = 3.46 s, so the initial velocity of the ball would be v = √2(9.8)(3.46) = 14.7 m/s.
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Which of the following happens to an object in free fall right after it’s thrown upwards?
(Select all that apply.)
a. Increasing Ug
b. Decreasing Ug
c. Decreasing K
d. Increasing K
e. None of the above
The a body has been thrown upwards then there would be Decreasing Ug. Option B
What is free fall?If we are talking about the free fall, let us bear in mind that we have to know that this is the situation where the object would be falling freely under the influence of gravity.
We must note that the acceleration due to gravity would cause the object to move at a constant velocity as the object is falling freely on the surface of the earth. The value of the acceleration due to gravity would be decreasing as the object is moving upwards.
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A motor requires 400 joules of energy to lift a 5. 0 kg mass 2. 0 meters. Calculate the efficiency of this motor
A motor requires 400 joules of energy to lift a 5. 0 kg mass 2. 0 meters. The efficiency of this motor is 25%.
What is meant by energy ?
Energy is referred to by scientists as the capacity for work. People have figured out how to transform energy from one form to another and then use it to accomplish tasks, making modern civilization possible.The ability to exert a force that causes an item to move is what is meant by the definition of energy as the "power to accomplish work." Even though the definition is unclear, the meaning is clear: energy is simply the force that moves things.Energy can take on a variety of shapes. Examples of these include: electrical energy, sound energy, chemical energy, nuclear or atomic energy, light energy, heat energy, mechanical energy, gravitational energy, and so on.Each form has the ability to shift or transform into the others.To learn more about energy refer to
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Avatar questions
1) Since the moon Pandora is presumably smaller than the Earth , what can you expect to be different ? In other words our moon is smaller than the Earth & what's one of the big differences because of that
2) Did you see any evidence of this difference in the movie Yes / No ? If yes , where ? If no , what should you have seen ?
3) Give an example where the law of physics is SERIOUSLY VIOLATED hint ( has something to do with " something " that shouldn't be floating ) .
4) How are the Na'vi aliens maybe a bit too much like us humans or animals on their planet mean come on , they developed on another planet -- give at least 3 traits that make them " too human " or animals that are too close to things here at home :
1) Because the moon Pandora is smaller than the Earth, it is likely to have a weaker gravitational pull and a thinner atmosphere. This means that heavier objects, like people, would be able to fly and jump higher than on the Earth.
2) No, there was no evidence of this difference in the movie. If there was, the characters should have been seen flying or jumping higher than what is normal on Earth.
3) In the movie, one of the characters is able to fly while holding onto a large tree branch. This violates the law of physics, as the branch should not be able to remain afloat due to its size and weight.
4) The Na'vi aliens have some traits that make them too similar to humans and animals on Earth. These traits include having two eyes, a humanoid shape, and speaking a language. They also have animals that are similar to those found on Earth, such as horses, birds, and dogs.
What is gravitional pull?
Gravitational pull is the force of attraction between objects that have mass. It is the force that keeps us on the ground and keeps the planets in orbit around the sun. It is a fundamental force of nature that is caused by the interaction between two objects with mass.
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A teacher conducts an experiment in class to show the importance of physical properties in classifying matter. You have six samples of different materials with the same mass of 12 grams(g). Some samples are larger than others, but they all have the same mass. The teacher classified the samples into two groups based on a single physical property. Then, he asked the students: Which physical property would you most likely have used to classify the samples into these two groups?
Physical and chemical qualities are present in all matter.
What are Physical properties?Physical qualities, such as mass, color, and volume, are characteristics that may be measured by scientists without modifying the makeup of the sample being studied (the amount of space occupied by a sample).
Chemical characteristics, such as flammability and susceptibility to corrosion, define a substance's distinctive capacity to reacted to generate new substances. A pure substance's chemical and physical properties are the same in all samples.
Extensive or intensive physical properties are both possible. The substance's extensive attributes, such as mass, weight, and size, change with the amount present.
Therefore, Physical and chemical qualities are present in all matter.
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If a current of 23A flows through a circuit and the battery produces a potential difference of 9V, calculate the resistance.
The resistance of the battery if a current of 23A flows through a circuit and the battery produces a potential difference of 9V is 0.39 ohms.
How to calculate resistance?Resistance is the force that tends to oppose motion. It is measured in ohms. The resistance of a battery can be calculated using the following formula;
V = IR
Where;
V = voltage (volts)R = resistanceI = currentAccording to this question, a current of 23A flows through a circuit and the battery produces a potential difference of 9V. The resistance can be calculated as follows:
R = V/I
R = 9/23
R = 0.39ohms
Therefore, 0.39ohms is the resistance of the battery.
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Two cannons / same amount of powder / same size cannon balls / one is short and the other is long, Which one would send the cannon ball a greater distance? Explain using physics
A cannon is a large-caliber gun that belongs to the artillery category. It typically fires a projectile propelled by an explosive chemical.
What are Cannons?Before smokeless powder was developed in the late 19th century, gunpowder, sometimes known as "black powder," served as the main propellant.
Depending on their intended purpose on the battlefield, different types of gun combine and balance these characteristics to differing degrees. Cannons differ in gauge, effective range, mobility, rate of fire, angle of fire, and firepower.
The word "cannon" is borrowed from a number of languages, with the original meanings typically being "tube," "cane," or "reed."
Therefore, A cannon is a large-caliber gun that belongs to the artillery category. It typically fires a projectile propelled by an explosive chemical.
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What is different at the molecular level between a solid and a liquid? (multiple answers)
Answer:
The difference between a solid and a liquid at the molecular level lies in the strength of the intermolecular attraction.
Explanation:
Solids and liquids have similar densities, so the tightness of the packing is not the difference.
The difference lies in the strength of the intermolecular (between different molecules) attraction. In solids, the intermolecular attractions are strong enough to hold the same molecules together with their neighbors, despite the random thermal vibrations. The same group of nearest neighbor molecules and second nearest and third nearest, and so on out to very large numbers, stays together. So the molecules are stationary, except for vibrations around an average position. That's solid.
the intermolecular forces are strong enough in liquids to keep nearest neighbors together only for short times before the thermal vibrations break apart the groupings. Thus the molecules are always close to each other, but don’t stay next to any particular other molecules, so the whole collection of it can easily flow, but with a specific volume. That’s a liquid.
In a gas, the intermolecular forces are too weak to hold the molecules near each other and the thermal random motion quickly splits up any short-term pairs. So it flows easily with no specific volume - the molecules are all approximately independent from each other.
In ionic solids, there are no specific molecules, but replace “molecules” above with “ions of opposite charge”
After landing on Mars, you drop a marker from the door of your landing module and observe that it takes 2.1 s to fall to the ground. When you dropped the marker from the module door on Earth, it took 1.3 s to hit the ground.What is the magnitude of the acceleration due to gravity near the surface of Mars?
ANSWER: 3.43 m / s² , as assuming that in both instances, air resistance is minimal and that the location is close to the Earth's surface, approximately.
EXPLAINATION :
let us assume displacement be X
acceleration of marker be A
time to reach the ground be T
According to the presumptions, the marker's acceleration would be constant, and the SUVAT equations would be applicable. X = 1/2 A T²
To determine acceleration, reorder the SUVAT equation:
A = 2X /T²
Now let , [tex]A_mars[/tex] be acceleration at mars and be [tex]T_mars[/tex] time taken on mars
similarly, [tex]A_earth[/tex] be acceleration at earth and [tex]T_earth[/tex] be time taken on earth
since marker travelled the same displacement ,
Using the SUVAT equation from above:
[tex]A_mars[/tex]= 2X ÷[tex]T_mars[/tex] ² ------- (1)
[tex]A_earth[/tex]= 2X÷ [tex]T_earth[/tex]² -------- (2)
divide 1 by 2
[tex]A_mars[/tex] /[tex]A_earth[/tex]= 2X / Tmars² ÷ 2X/ Tearth²
[tex]A_mars[/tex] / [tex]A_earth[/tex]=( [tex]T_earth[/tex] / [tex]T_mars[/tex] )²
[tex]A_mars[/tex] = ( [tex]T_earth[/tex]/ [tex]T_mars[/tex])² X[tex]A_earth[/tex]
(1.3 s / 2.2 s )² X 9.8m/s²
3.43 ms⁻²
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Step1:
The marker is first set free from rest so it can fall to the ground. The task's provided values are:
tE=1.3s|gE|=9.8m/s2 and tM=2.1s
On Mars, the acceleration brought on by gravity is necessary.
Step 2:
The equation for the speeding object's position in a gravitational field is the one utilized in this work.
y(t)=y0+v0t+1/2gt2 ....(1)
Step 3:
find y(tE) ==h by solving eq(1).
As a starting position, y0 must equal 0; similarly, v must equal 0.
h=1/2gEtE2 =9.8.1.32/2 =8.28m.
(2)
Step 4:
Use the numbers for Mars and height from Eq (2) to solve for eq(1) for gM. These values are:
h=1/2gMt2M/.2/t2,
gM=2h/tm2 =2.828/2.1.
2\s =3.75 m/s2
Step 5:
The outcome is gM=3.75m/s2
Describe acceleration.
In physics, acceleration is the rate at which the velocity of an object changes about time. According to Newton's Second Law, the sum of all forces acting on an item results in its acceleration. The meter per second squared (m s2) is the unit of acceleration used in the SI system.
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a point charge with charge 0.00874 c is located at coordinate (0, 0). what is the y component of the electric field in n/c produced by this charge at coordinate (-9.88, 6.11)? the coordinates are given in meters.
The y component of the electric field is -5.17e-4 N/C.
What is electric field?Electric field is a physical quantity that is used to describe the force exerted on a charged particle by an electric field. It is a vector quantity that can be measured in newtons per coulomb (N/C). Electric field is created by a stationary charge, which can be either a positive or negative charge.
The electric field at any given point is determined by Coulomb's Law. The formula for Coulomb's law is
E = k * (q1 * q2) / r^2
where k is the Coulomb constant, q1 and q2 are the two charges, and r is the distance between them.
In this case, q1 is the point charge and q2 is a test charge at the given coordinates. The distance between them is given by the Pythagorean theorem: r = sqrt((-9.88)^2 + (6.11)^2) = 10.90 m.
Plugging all of this into the formula, we get
E = 9e9 * (0.00874 * 1) / (10.90)^2 = 8.05e-4 N/C
The electric field is a vector, so we must also calculate the direction. The electric field points away from the point charge, so we can use the direction of the vector from the point charge to the test charge to determine the direction of the electric field. The direction is determined by arctan(6.11/-9.88) = -0.6358 radians.
Thus, the electric field vector can be written as (8.05e-4 * cos(-0.6358), 8.05e-4 * sin(-0.6358)) = (-7.46e-4, -5.17e-4) N/C.
The y component of the electric field is -5.17e-4 N/C.
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Two objects moved to 1/3 of the original distance. What is the new force if the original force was 45 Newtons?
Two objects moved to 1/3 of the original distance.The new new force if the original force was 45 Newtons is 405 newton.
Force: What is it?
Force is a physical quantity that describes how two or more objects interact with one another. It has magnitude and direction because it is a vector quantity.
A push or pull on an object is a common way to describe force. It has the ability to accelerate, change direction, or alter an object's size or shape. There are two primary categories of forces: non-contact and contact forces.
Newton (N) is the standard force unit in the International System of Units (SI). The force required to accelerate a mass of one kilogram at a rate of one meter per second squared is referred to as one Newton.
The British system uses the pound-force (lbf), the CGS system uses the dyne, and the Metric system uses the kilopond (kp).
Calculating the problem:The new force F2 is given by:
F2 = F1 × (d1^2 / d2^2)
F2 = 45 N × (d1^2 / (1/3d1)^2)
F2 = 45 N × (d1^2 / (1/9d1^2))
F2 = 45 N × 9d1^2 / (1/9d1^2)
F2 = 45 N × 9
F2 = 405 N
So, the new force is 405 Newtons.
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I have a project due tomorrow to make a compound machine. What I did is I made a wheel and axle by taking a long pencil (11.2 inches) and attaching it to two wheels on either end which are 1.1 inches. Then I tied a string (5 inches) in the middle of the pencil. This acted as a pulley. My problem is I do not know how to calculate mechanical advantage for my compound machine. Please help.
The ratio of the output force exerted by the last machine in the series divided by the input force applied to the first machine is the mechanical advantage of a compound machine.
What is a compound machine?A machine is a physical system that use power to exert forces, regulate movement, and carry out an action.
A compound machine is a device made up of several simple machines connected in series, each of which serves as the input force for the others. A simple gear train is made up of several gears (wheels and axles) connected in series, just like a bench vise is made up of a lever (the vise's handle) and a screw.
The product of the mechanical advantages of the series of basic machines that make up the compound machine equals the mechanical advantage of the compound machine.
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trials with which two sets of experimental conditions would allow an experimenter to determine the effect of increasing drop height upon the force experienced by the egg?
Size: large, drop height: 1 metre, surface: hard floor, and size: large, drop height: 10 metres, surface: hard floor are the two trials that would allow a researcher to examine the influence of increasing drop height upon the force experienced by the egg.
Since the goal of the experiment is to understand how a difference in mass (or size) can impact the force that the egg experiences, It means that the other points of measurement should remain the same and only the size should change. Therefore, the Trials that would enable an experimenter to ascertain the impact of increasing drop height on the force felt by the egg under two sets of experimental conditions are size: large, drop height: 1 metre, and surface: hard.
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Two cubical block A and B of ame dimenion but mae m and 3m are joined by a tring and are at equilibrium in water a hown in figure. Then
The density of block A and block B is 500 kg/m^3 and 1500 kg/m^3 respectively and the tension of the string is mg.
To find: The density of 2 masses and Tension of the string
What is meant by density ?
The measure of how densely a material is packed together is called density. As the mass per unit volume, it has that definition.Symbol for density: D or Formula for Density: Where is the density, m is the object's mass, and V is its volume, the equation is: = m/V.How much matter is confined within a volume is determined by density. For an identical size object, a dense object weighs more than a less dense one. A substance that is less dense than water will float on it; a substance that is denser will sink. Density equals mass per unit volume, or D = M / V, is the density equation.Mass of block A=m and Mass of block B= 3m.
Let V represent the volume of the block, ρ represents the water density, and ρ1 represent the density of block A.
For Block A, V ρ g = T+ V ρ1g……… (1) where T represents the string's tension.
For block B, V ρ g +T= 3V ρ1g……… (2)
Adding (1) and (2), we get
2V ρ g = 4V ρ1 g
ρ1 = ρ/2 = 1000/2 =500 Kg m^-3
As a result, block A's density is 500 kg/m^3, while block B's density is 1500 kg/m^3.
When we enter these values into (1), we get
V 2ρ1 g = T+ V ρ1g
T = V ρ1 g = mg
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calculate the total potential energy, in btu, of an object that is 20 ft below a datum level at a location where g
The total potential energy of an object that is 20 ft below a datum level at a location where g = 31.7 ft/s², and which has a mass of 100 lbm is 2.53 Btu.
Potential energy is the power that an object can store as a result of its position in relation to other objects, internal tensions, electric charge, or other circumstances. Potential energy is denoted mathematically as:
PE = m x g x h
Where,
m = mass of the object (kg)
g = acceleration due gravity
h = height
We must calculate an object's total potential energy in British thermal units (Btu)
Hence,
PE = 100 x 31.7 x 20 (1 / 25037) btu
= 2.5322 btu
The question is incomplete, it should be:
Calculate the total potential energy, in Btu, of an object that is 20 ft below a datum level at a location where g = 31.7 ft/s², and which has a mass of 100 lbm.
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-- (
2)
(iii) In an experiment using this circuit, an ammeter reading
was 0. 75 A.
The calculated value of the resistance of resistor Rwas 16 0.
What is the voltmeter reading?
Answer:
In order to determine the voltmeter reading in this experiment, we need to use Ohm's Law, which states that the current in a circuit is directly proportional to the voltage and inversely proportional to the resistance. The equation is:
V = I * R
Where:
V = voltage (measured in volts)
I = current (measured in amperes)
R = resistance (measured in ohms)
Given that the ammeter reading was 0.75 A and the resistance of resistor R was 160 ohms, we can substitute these values into the equation:
V = 0.75 A * 160 ohms
V = 120 V
Therefore, the voltmeter reading is 120 V.
a physical pendulum in the form of a planar object moves in simple harmonic motion with a frequency of 0.450 hz. the pendulum has a mass of 2.20 kg, and the pivot is located 0.350 m from the center of mass. determine the moment of inertia of the pendulum about the pivot poin
The moment of inertia of the pendulum about the pivot point is 0.385 kgm2.
A physical pendulum in the form of a planar object moves in simple harmonic motion when it oscillates about a pivot point, and the frequency of oscillation is determined by the moment of inertia of the pendulum about the pivot point.
The frequency of oscillation of the pendulum is given as 0.450 Hz. The moment of inertia of the pendulum I can be calculated using the equation:
[tex]I= ML^{2}[/tex]
where m is the mass of the pendulum and L is the distance from the pivot point to the center of mass.
In this case, the mass of the pendulum is 2.20 kg and the distance from the pivot point to the center of mass is 0.350 m, so the moment of inertia is:
[tex]I=(2.20)(0.350)^{2} \\0.385 Kgm^{2}[/tex]
So, the moment of inertia of the pendulum about the pivot point is
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what are the sign and magnitude in coulombs of a point charge that produces a potential of -2.00 v at a distance of 5.00 mm? c
-1.11 × 10⁻¹³ is the sign and magnitude in coulombs of a point charge that produces a potential of -2.00 v at a distance of 5.00 mm.
Given:
Potential = -2.00 V
Distance = 5.00 mm
= 5 × 10⁻³ m
We know that electric potential due to charge is
V = kq/r
where,
v = Electric potential energy
q = point charge
r = distance between any point near the charge to the point of the charge
k = coulomb constant
Now put the values in above equation then we get the value of q from the above equation
[tex]-2 = \frac{8.99 \times 10^{9} \times q}{5 \times 10^{-3}}[/tex]
[tex]q = \frac{-2 \times 5 \times 10^{-3}}{8.99 \times 10^{9}}[/tex]
q = -1.11 × 10⁻¹³
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a model rocket sits on a launch pad loaded with fuel. the igniter causes the rocket to rise off the pad, oxidizing 100 g of fuel and ejecting it out the back of the rocket at 650 m/s. after launch, the rocket has a mass of 3 kg. what is its velocity after launch?
The velocity of the rocket after launch is 21.67 m/s.
The velocity of the rocket after launch can be calculated by using the equation of motion for the conservation of momentum.
The initial momentum of the rocket-fuel system is zero (the rocket is at rest on the launch pad), and the final momentum is equal to the mass of the rocket (3 kg) multiplied by its velocity after launch.
We know that the initial momentum is zero, and the final momentum is (mass * velocity)
we can find the final velocity by,
final momentum = mass * velocity
= (3kg) * v
We also know that the fuel is ejected out the back of the rocket at a velocity of 650 m/s
So the momentum of the fuel is equal to its mass (100 g) multiplied by its velocity.
momentum of fuel = mass * velocity
= (0.1 kg) * 650 m/s
The momentum of the rocket-fuel system must be conserved, so the final momentum of the rocket after launch is equal to the momentum of the fuel that was ejected.
final momentum = (3 kg) * v = (0.1 kg) * 650 m/s
By solving V, we get:
v = (0.1 kg * 650 m/s) / 3 kg = 21.67 m/s
So the velocity of the rocket after launch is 21.67 m/s.
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