Answer:
work done on the body is the product of the 3 quantities provided
mass in kilogram, macceleration due to gravity in meters per seconds, gdistance or height in meters, hExplanation:
Raising the object, the work done will be the potential energy.
potential energy equals mgh.
Get the remaining quantities and multiply it out g is usually 10m/s
Solve and show conversions
Answer:
°c to °F = 176°F
°c to K = 353 K
Explanation:
1, °c to °F = (°c × 9/5) +32
[tex](80 \times \frac{9}{5} ) + 32[/tex]
(16 × 9) + 32 = 144 + 32 = 176°F
2, °c to K = °c + 273
[tex]80 + 273[/tex]
= 353 K
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Determine the mass of a sphere with a radius of 8 cm having a density of 7500 kg / m3
Answer:
Explanation:
V=2140CM3
M=VOLUME*DENSITY
7500kg/m3=7.5g/cm3
2140cm3*7.5g/cm3=16050
16050g
A student runs an experiment in which a block of known mass is moving across a horizontal table in an xy-coordinate plane. As the block reaches the origin of the coordinate system, the block explodes into two pieces of masses m1 and m2. During the experiment, the velocity of the block 1.0 second before the explosion and the velocity of the two pieces 1.0 second after the explosion are measured using a motion sensor. Conservation of momentum is applied using the masses of the two pieces. However, when the velocity of the piece of mass m2 is calculated, the measured value is 10% less than the calculated value. Which of the following statements best explains the difference in the calculated and measured velocity?
The statement that best explains this difference is "As the block is moving across the table, friction will affect the block’s motion and thus could account for the difference" (option A).
What is friction?In physics, friction can be defined as a force of resistance that occurs when an objects moves above a surface or above another object. Friction can be classified in four types:
Static friction: This is the type of friction when two objects are in contact agaisnt each other but there is no movement.Sliding friction: This type of friction occurs as one object moves over another.How does friction affect the velocity of the object moving?This force opposes the movement of the object and therefore it can affect the velocity of the object by decreasing it. Based on this, it is likely that the difference in the calculation is because of friction as this was not considered (option A).
Note: This question is incomplete; here is the missing section:
A. As the block is moving across the table, friction will affect the block’s motion and thus could account for the difference.
B. It is possible that a small amount of the original block was lost during the explosion.
C. When the student did the calculation, the student assumed that the explosion occurred just as the block reached the origin. The difference in velocity could be due to the explosion occurring either just before or just after the origin.
D. The explosion created a force that affected the experiment.
E. Conservation of momentum is not the correct equation to apply to the explosion, since the two pieces apply forces to each other.
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Answer:
The difference between the calculated and measured velocity of the piece of mass m2 can be attributed to several factors. Here are a few possible explanations:
1. Measurement error: It's possible that there were errors or inaccuracies in the measurements taken by the motion sensor. This could include issues with the sensor itself, calibration errors, or human error in recording the data.
2. Friction and air resistance: The experiment assumes an ideal scenario where there are no external forces acting on the block and the resulting fragments. However, in reality, there may be friction and air resistance present, which can reduce the velocity of the pieces after the explosion. These factors were not accounted for in the conservation of momentum calculations.
3. Internal forces: The explosion of the block into two pieces involves internal forces between the fragments. These forces may not be completely accounted for in the conservation of momentum analysis. If there are significant internal forces acting during the explosion, they could reduce the calculated velocity of the piece of mass m2 compared to the measured value.
4. Incomplete information: It's possible that there is additional information or factors that were not considered in the given description of the experiment. Without knowing all the details, it's challenging to pinpoint the exact reason for the discrepancy between the calculated and measured velocity.
In summary, the most likely explanation for the difference between the calculated and measured velocity of the piece of mass m2 is measurement error or the presence of external forces (such as friction and air resistance) and internal forces (during the explosion) that were not accounted for in the analysis.
A tennis ball has a mass of 57 g. A tennis player hits the tennis ball with a tennis racket. The tennis ball has a velocity of 25 m / s when it hits the racket. The velocity of the tennis ball when it leaves the player’s racket is 15 m / s in the opposite direction from its approaching direction. The average force exerted by the tennis racket on the ball is 35 N. For how long is the tennis ball in contact with the tennis racket?
Answer:
0.065 seconds
Explanation:
i) Change in momentum is equal to impulse so, m(v-u) = ft (Where f is force and t is time)
ii) Since we know the mass of the ball, we change grams to the SI unit of kilograms, kg so 0.057kg
iii) We are also told that the ball CHANGES direction, so we know that the new velocity is the negative value of the initial one,
iv) Putting this all together we get 0.057(25--15) which is the same as 0.057(25 + 15)
v) We get an impulse of 2.28 Ns
vi) We take this value and divide it by 35 as we want the Force alone and not the time,
vii) To which we get 0.065 seconds,
Hope this was helpful!!
If a capital letter R is seen in an ordinary mirror , what does it look like?
If a capital letter R is seen in an ordinary mirror, it will look like option D. The correct option is D.
What is a mirror?Something that is reversed with respect to a previous instance of the same thing, or with respect to a plane or axis in between. The best illustration of a virtual image is a reflection in a mirror.
Real images are created by intersecting rays, and virtual images are created by diverging rays. A mirror creates a virtual image by reflecting a real image (blue) back to the viewer (red), giving the impression that the items in the image are behind the mirror's surface and facing the other way (purple).
The R in the mirror will look vertically inverse. The types of mirrors are plane mirrors, rotating mirrors, inclined mirrors, and spherical mirrors.
Therefore, the correct option is D.
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Using data from the diagram below, calculate the ratio of the height to which water at 0°C and mercury are raised or suppressed by capillary action in the same glass tube (use density and
surface tension values of water that are accurate to at least 3 significant figures for your calculation. Include the appropriate sign with your answer.)
water
mercury
Due to stronger cohesive than adhesive forces mercury levels falls in a capillary tube. However, water level rises in a capillary tube due to greater adhesive than cohesive forces.
What is capillary action?Capillary action refers to the rise or fall of a liquid in a narrow tube.
The height to which a liquid is depressed or rises in a narrow tube depends on the strength of the cohesive forces of the molecules of the fluid compared to the adhesive forces between the molecules of the fluid and the walls of the tube.
In water, the adhesive forces between the walls of the tube and water molecules is greater than the cohesive forces between water molecules, hence water rises in a capillary tube.
In mercury the adhesive forces between the walls of the tube and water molecules is less than the cohesive forces between mercury molecules, hence mercury levels falls in a capillary tube.
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A steam governor uses negative feedback to control the speed of a steam engine. Suppose a steam governor
has two balls that are each rotating with a tangential speed of 3.7 m/s. The balls are 0.10 m from the rotation
axis, and the centripetal force on each ball is 670 N. What is the mass of one of the balls?
Answer:
F = M a Newton's second law
a = v^2 / R = (3.7 m/s)^2 / .10 m = 137 m/s^2
M = F / a = 670 N / 137 m/s^2 = 4.89 kg
which statment is correct about the mass of carbon dioxide used during photosynthesis
Answer:
the amount of carbon dioxide used is equal to the amount of oxygen formed.
Explanation:
I hope that helped you didn't put any statements so I couldn't really tell witch one was right-
Are amplitude and wavelength related?
A: Yes
B: No
The answer is A.Yes
Explanation:
The amplitude of a wave is the height of a wave as measured from the highest point of the wave to the lowest on the wave.
a story that ends indeed God knows the best
Answer:
In fact, God already knows how your story will end. The thing is, it’s really his story and he created you to be a unique and significant part of it. That’s why you can have faith that he is working to take care of you and to give you a good future. God repeatedly says in Scripture that he will one day reward us for our faith.
Good luck
Explanation:
What game has worst Physics?
Answer:
Cyberpunk has worst Physics
A car accelerates uniformly from rest tona speed of 30.0 mi/h in 12.0s. Find the distance the car travels during this time? Find the constant acceleration of the car?
Answer:
2.5 mi/s^2
Explanation:
please see paper for work!
ghghghghghg gh gh gh gh gh gh
Answer:
Explanation:
this is a wste of time and question people realy want to learn in this page.
Captain Picard beams down to a previously unexplored planet. The planet has four times the mass of Earth, and twice the radius. If the force of gravity on the surface of Earth is represented by "g," what is the force of gravity on the surface of the new planet?
A. g
B. 2g
C. 4g
D. 8g
The force of gravity on the surface of the new planet is g
Option A is correct
The force of gravity on the surface of the new planetForce of gravity: the force of gravity speaks to the force that acts on every body that exists under a given space or planet.
The force of gravity acts on masses to create weight.
W=mg
Generally the equation for the Force of gravity is mathematically given as
[tex]g=\frac{Gme}{Re^2}\\\\Therefore\\\\g'=\frac{G*4Me}{2Re^2}\\\\g=4/4\frac{GMe}{Re^2}\\\\[/tex]
g=1g
Therefore, the force of gravity on the surface of the new planet is g
Option A is correct
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The speed in Case A is twice that of Case B. The object mass
in Case A is one-half that of Case B. The radius is the same
in each case. How does the net force in Case A compare to
the net force in Case B?
Answer:
one-half that of Case B.
Explanation:
I am sorry if I get it wrong
During Taylor's second test of a car with a mass of 200 grams, she recorded 11 seconds, 11.4 seconds, and 11.2 seconds for her 3 trials. What would be the mean value she would use to compare with the other cars?
11.53 seconds
33.6 seconds
11.2 seconds
11 seconds
Answer:
C. 11.2 seconds
The mean value of three trials of 11, 11.4 and 11.2 seconds will be 11.2 seconds
What is mean?The mean for any data is defined as the ratio of the sum of all the data to the number of the data.
It is given that
[tex]t_1=11\ \ \ \ \ \ \ \ t_2=11.4 \ \ \ \ \ \ \ \ t_3=11.2[/tex]
Now the mean is given as
[tex]\rm Mean=\dfrac{t_1+t_2+t_3}{N}[/tex]
[tex]\rm Mean=\dfrac{11+11.4+11.2}{3}=11.2 \ Sec[/tex]
Hence the mean value of three trials of 11, 11.4 and 11.2 seconds will be 11.2 seconds
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4. In the image, a rubber balloon is being rubbed back and forth against a wool
scarf. Which of the following is true? *
The balloon lost some electrons to the scarf during the charging process.
The balloon lost all of its electrons to the scarf during the charging process.
After rubbing, the balloon has the opposite charge as the scarf.
The scarf would now be repelled by the balloon.
lost some electrons I think
What is the highest-frequency sound to which this machine can be adjusted without exceeding the prescribed limit
The highest frequency sound to which the machine can be adjusted is :
4179.33 HzGiven data :
Pressure = 10 Pa
Speed of sound = 344 m/s
Displacement altitude = 10⁻⁶ m
Determine the highest frequency sound ( f )applying the formula below
Pmax = [tex]B(\frac{2\pi f}{v}) A[/tex] --- ( 1 )
Therefore :
f = ( Pmax * V ) / [tex]2\pi \beta A[/tex]
= ( 10 * 344 ) / 2[tex]\pi[/tex] * 1.31 * 10⁵ * 10⁻⁶
= 4179.33 Hz
Hence we can conclude that The highest frequency sound to which the machine can be adjusted is : 4179.33 Hz .
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Attached below is the missing part of the question
A loud factory machine produces sound having a displacement amplitude in air of 1.00 μm, but the frequency of this sound can be adjusted. In order to prevent ear damage to the workers, the maximum pressure amplitude of the sound waves is limited to 10.0 Pa. Under the conditions of this factory, the bulk modulus of air is 1.31×105 Pa. The speed of sound in air is 344 m/s. What is the highest-frequency sound to which this machine can be adjusted without exceeding the prescribed limit?
A ball falls from rest from a height of 7.5 m above the ground level. How much time does the ball take to reach the ground?. Consider g = 9.81 m/s².
2.47 s
0.62 s
1.24 s
0.87 s
7. A golfer hits a golf ball a through a horizontal displacement of 80m. The time of flight for the ball was 1.8
seconds. Keeping it simple, ignoring friction and the ball's rotation, determine the velocity (magnitude and
direction) of the ball as it left the golfer's club.
Answer:
44.4 m/s
Explanation:
d = 80 m, t = 1.8 s, find v
d = v*t
v = d/t = 80/1.8 = 44.4 m/s
complete these sentences by crossing out the incorrect words.
The greater the amplitude of a wave, the ( less/more ) energy it is transferring. As waves spread out from a source, the energy they transfer gets more ( concentrated/ spread out ) and so the amplitude of the waves gets ( larger/ smaller)
Answer:
The greater the amplitude of a wave, the ( less/more ) energy it is transferring.
The more energy; so that means less would be the incorrect word
As waves spread out from a source, the energy they transfer gets more ( concentrated/ spread out )
Spread out; so that means concentrated would the be the incorrect word
and so the amplitude of the waves gets ( larger/ smaller)
Smaller; so that means larger is the incorrect word
Does anyone know how to find the mass of one piece of paper , printing paper to be exact
The energy that can be extracted from a storage battery is always less than the energy that goes into it while it is being charged. Why?
This is because no battery or energy storage device is 100% efficient, meaning that some of the energy that goes into charging the battery is lost as heat or other forms of energy during the charging process.
This loss of energy is due to several factors, including resistance in the battery's electrical components, chemical reactions that occur within the battery during charging, and other inefficiencies in the charging process.
As a result, when the battery is discharged, it cannot release all the energy that was originally put into it during charging, and some of the energy is lost as heat or other forms of energy. This is known as energy loss or energy dissipation, and it is a common occurrence in all types of energy storage systems.
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Find the weight of a 2 g (=0.002 kg) computer chip. The acceleration due to gravity at the surface of Earth is 9.8 m/s^2.
Answer: 0.0196 Newtons (0.0196N)
Explanation:
Weight is the test mass multiplied by the gravitational field created from the source mass. The source mass is the Earth, and the test mass is the computer chip:
[tex]W=mg[/tex]
[tex]W=(0.002kg)(9.8m/s^2)[/tex]
[tex]W=0.0196N[/tex]
a
A tennis ball is hit vertically
upward with a velocity of 30 ms-1.
It takes 3 s to reach the highest
point. Calculate the maximum
height reached by the ball. How
long it will take to return to
ground?
h=vot-1/2gt²
h=30 x 3 - 1/2 x 9.8 x 3²
h = 45.9 m
t = 2to
t = 2 x 3 = 6s
Which of the vectors in the graph below is the negative of the vector v?
Answer:
D
Explanation:
Answer:
A. D
Explanation:
5. A 100 N force is applied at an angle of 30 degrees to the horizontal to move a 15 kg object at a constant speed for a horizontal distance of 5 m. Calculate the work done. Your answer Back Next Clear form
Answer:
433 J
Explanation:
F = 100 N, θ = 30°, m = 15 kg, d = 5 m
Work done = F * d * cosθ = 100 * 5 * cos(30) = 433 J
Which of the following determines the natural frequency of an object?
A. Color
B. Pressure
C. Length
Answer:
C
Explanation:
The longer an object, the slower it vibrates and since frequency is the number of oscillations an object makes per second, then you can say the longer the object, the lower the frequency, and the inverse is true.
19) Study the chart above. Which statement is TRUE regarding natural and synthetic (manufactured) fibers?
A) Glass is a natural material.
B) Staple fibers do not come from animals.
C) Organic manufactured materials are either synthetic or natural plastics.
D) Synthetic polymers including polyester and nylon, make up a large category of synthetic material.
Answer: The answer is D: Synthetic polymers including polyester and nylon, make up a large category of synthetic material.
Explanation:
What is the power in watts of a 6-A
appliance designed to operate on a 120-V circuit?
Answer:
720W
Explanation:
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