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
How does the electric force between two charged particles change if the
distance between them is reduced by a factor of 2?
A. It is reduced by a factor of 4.
B. It is reduced by a factor of 2.
C. It is increased by a factor of 4.
ОО
D. It is increased by a factor of 2.
Answer:
D
Explanation:
If the distance is reduced by factor of 2, lets say the distance was 10cm
reducing by a factor of 2 will leave the distance at 5cm
so the electric force increases by a factor of 2
How might having a testing site like the "Mars Yard" be helpful in mission planning? Provide an example of how this might help scientists solve a problem during a mission.
Your answer should include at least two complete sentences.
Be sure to check your grammar and spelling.
Testing site provides real environment to the scientists.
How testing site help the scientists to solve problem?This type of site might help scientists to solve a problem during a mission because the site provides real environment and similar problems comes to the scientist which can be solved so that the real experiment can't experience such type of difficulties so we can conclude that testing site provides real environment to the scientists.
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A force is exerted on a box and an equal and opposite force is exerted by the box. What will happen to the box?
Explanation:
The box will undergo an acceleration. Due to Newton's 3rd Law, any action causes an equal and opposite reaction. The equal and opposite force from the box will not cancel the force that you are applying.
Answer:
The box will not move as it is in a a stable condition
Explanation:
when an equal and opposite force acts on a body the effects of forces cancels out. provided the body can withstand the tensile and compressive actions of the forces. when both forces are coming together it leads to compression while tension refers to forces moving away fro, each other.
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.
An object is moving to the left
at a constant speed. Its
acceleration is:
A. Positive
B. Negative
C. Zero
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
A uniform disc of inertia 75kgm and the radius of gyration 3m rotates with angular velocity of 2 rads. Determine the mass
Answer:
I= 1/2 mr^2 solve for mass m.
radius given
angular momentum: I*w=I*2
KE= 1/2 I w^2= 1/2 I *2^2
Explanation:
The mass of the uniform disc at the given moment of inertia is determined as 16.67 kg.
Conservation of angular momentumThe mass of the uniform disc is calculated from the moment of inertia of the disc.
I = ¹/₂mr²
2I = mr²
m = (2I)/r²
where;
m is mass of the discI is moment of inertiar is radius of the discm = (2 x 75)/(3²)
m = 16.67 kg
Thus, the mass of the uniform disc at the given moment of inertia is determined as 16.67 kg.
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What game has worst Physics?
Answer:
Cyberpunk has worst Physics
What are the six functions of a root
Answer:
hold the plant in the ground
keep the plant upright
absorb water from the soil
take in nutrients from the soil
transport water and nutrients to the plant
provide a place for food storage
Explanation:
The plants are very complex organisms and can be classified into various types based on certain characteristics. The roots are very important structures which provide a lot of functions.
What are roots?The roots are the important underground part of all the vascular plants. This part of the plant is generally responsible for anchoring it down into the ground and absorbing all the essential minerals, nutrients, and water from the soil.
The root of the plant also help us to store the food. The roots are not the reproductive part of the plants, they are called the vegetative parts. In certain plants, the roots are the means of reproduction. This type of reproduction is called the vegetative reproduction.
The roots also check the soil erosion, provide sustenance and also habitat for various organisms. The root absorb water and minerals from the soil and help in the process of photosynthesis.
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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 bicycle dynamo emits light only when the bicycle is on motion,why
Answer:
because the friction/movement of the bikes wheels, generates electricity and energy that the light can use to generate electricity and it also does not have a battery on it and relies on the wheels to generate the electricity for the light to work.
Explanation:
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.
Does anyone know how to find the mass of one piece of paper , printing paper to be exact
Why does the Law of Conservation of Matter/Mass/Energy support climate change research?
A. The energy we use constantly being destroyed.
B. The energy we use is created every time we use electricity
C. The energy we use cycles throughout our world, always balanced, creating a stable climate.
D. The energy we use is released into the atmosphere, creating loop of continual absorption and releasing of heat
The law of conservation of energy supports climate change research because the energy we use is released into the atmosphere, creating loop of continual absorption and releasing of heat.
Law of conservation of energyThe law states that energy can neither be created nor destroyed but can always be converted from one form to another.
In light of this, any energy used by humans or natural processes is not destroyed. Instead, they are converted into another form or released into the atmosphere.
In the atmosphere, absorption and release of heat energy by greenhouse gases and irradiation create a loop. This loop causes a net heating or cooling of the planet, a phenomenon that affects the climate.
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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!!
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:
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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A basketball player is standing on the floor from the basket as in Figure Assuming that the height of the basket and player are of the same height. He shoots the ball at angle 45 o with the horizontal. The height covered through the trajectory is 2.05 m 0 = 45° O ji 18°C Clear ло ENG US 19
The ball will operate under the laws of parabolic projectile motion and possess features sure as
The acceleration of the basketball at the highest point in its trajectory is a=0
What is are the characteristics of the throw?Question Parameters:
the basket and player are of the same height.
He shoots the ball at angle 45 o
The height covered through the trajectory is 2.05 m 0 = 45°
The ball will create a parabolic shape to make a basket
Generally, the equation for the projectile motion is mathematically given as
y = (tan θ0)x – gx2/2(v0cosθ0)2
Therefore
This formula will calculate the motion of the ball.
With the y as its vertical representation and x as its horizontal representation
In conclusion, characteristics of the throw
The acceleration of the basketball at the highest point in its trajectory isa=0
The height of the ball is given as h =Usin\thetaRead more about Motion
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Which of the following Illustrates 2 resistors in a series circult? A, B, C, D.
Answer:
It's either B or D, I'm not positive which it is
Explanation:
Answer:
The answer is B.
Explanation:
The two resistors are in the same square space, while the others are not.
A box has a mass of 5.8 kg. the box is lifted from the garage floor and placed on a shelf. if the shelf is 2.5 m high, what is the potential energy of the box?
PE = mgh
PE = 5.8 x 9.8 x 2.5
PE = 142.1 J
the answer is 140 J and my work is on the paper, hope it helps!
is paper an insulator or a conductor?
Answer:
Paper is an insulator.
Please mark as brainliest
Answer:
Paper is an insulator because it don't allow heat to pass or flow through them.
Conductor
•Are materials that can transfer heat easily.
•Allowing heat to transfer freely through them.
Ex: cooking pan
silver
metal spoon
nail
Insulator
Are materials that do not allow heat to pass through them.
Ex: rubber
wood
leather
plastic
paper
which of the following is a true statement about the physical characteristics of the sun.
Answer:
The sun's interior is similar to the Earth's; it has a core, mantle, and crust
If the pressure on a gas is increased, the particles will __(blank)__.
Group of answer choices
move closer together, decreasing the volume
will stay about the same distance apart and move faster
move farther apart, increasing the volume
will stay about the same distance apart and move slower
Answer:
move closer together, decreasing the volume
Explanation:
Three children are sitting on a merry-go-round while a fourth child is pushing on the outside edge with a constant force. Why does it take less time for the fourth child to speed the merry-go-round up if the three other children all sit in the center rather than half way between the center and outside edge?
Answer:
I the moment of inertia is less if the other children sit in the center
Τ = I α the angular acceleration will be greater for a given torque Τ
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.
a rectangular container measuring 20cmX20cmX30cm is filled withn water.What is the mass of the voulme of water in kilogram and in grams?
Answer:
12,000 grams = 12 kg
Explanation:
Volume V = 20 x 20 x 30 cm³ = 12,000 cm³
density of water d = 1 g/cm³
so the mass is 12,000 grams = 12 kg
a sprinter starting from rest reaches final velocity of 18.0 mi/h. What is her average velocity?
Answer:
9m/s
Explanation:
Average velovity= (Initial velocity+Final velocity)/2
or A.V=(0+18)/2
or A.V= 9m/s
A sprinter starting from rest reaches final velocity of 18.0 mi/h. The average velocity of the sprinter is 9.0 mi/h.
Given that the sprinter starts from rest and reaches a final velocity of 18.0 mi/h, we can assume that the sprinter accelerates uniformly. Therefore, her average velocity would be the average of her initial velocity (0 mi/h) and her final velocity (18.0 mi/h).
Average velocity = (Initial velocity + Final velocity) / 2
Average velocity = (0 mi/h + 18.0 mi/h) / 2
Average velocity = 18.0 mi/h / 2
Average velocity = 9.0 mi/h
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What are the units for the spring constant k?
Answer:
F=k*x or
k is the spring constant, in Newtons per meter (N/m), and x is the displacement of the spring from its equilibrium position. The spring constant, k, is representative of how stiff the spring is. Stiffer (more difficult to stretch) springs have higher spring constant
Explanation:
Answer:
N/m
Explanation:
Spring force is defined as
F=kx
So,
the terms for spring constant can be rearranged to find
F/x =k
which simplifies to
N/m
since force F is in newtons, and displacement x is in meters.
The law of motion that states that if one object exerts a force on another object, the other object exerts an equal force back on the first object is
A. Newton's second law.
B. Newton's third law.
C. Newton's first law.
D. Newton's law of inertia
Answer:
B
Explanation:
For every action,there is an equal but opposite reaction.
Based on the latitude you estimated, predict how much energy is transferred from the sun to the surface, and then to the air in your city.
A low latitude, the energy transferred from the sun is high while at a high altitude the energy transferred from the sun is low.
Effect of latitude on energy transferred from the sunLatitude is an angle which ranges from 0 degree at the Equator to 90 degrees at the poles of the Earth.
At higher latitudes, the sun's rays are less direct and a lower latitude the ray's of the sun are more direct. The farther an area is from the equator, the lower its temperature.
Thus, a low latitude, the energy transferred from the sun is high while at a high altitude the energy transferred from the sun is low.
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