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Inga [223]
2 years ago
13

A 1.0-kg block and a 2.0-kg block are pressed together on a horizontal frictionless surface with a compressed very light spring

between them. They are not attached to the spring. After they are released and have both moved free of the spring
the lighter block will have more kinetic energy than the heavier block.
the magnitude of the momentum of the heavier block will be greater than the magnitude of the momentum of the lighter block.
the heavier block will have more kinetic energy than the lighter block.
both blocks will both have the same amount of kinetic energy.
both blocks will have equal
Physics
2 answers:
kykrilka [37]2 years ago
8 0
After they are released and have both moved free of the spring <span>the lighter block will have more kinetic energy than the heavier block. The correct option among all the options that are given in the question is the first option. I hope that this is the answer that has actually come to your desired help.</span>
zubka84 [21]2 years ago
6 0

Answer:

<h2>The magnitude of the momentum of the heavier block will be greater than the magnitude of the momentum of the lighter block.</h2>

Explanation:

Remember that momentum is not the same as energy or speed. Momentum or quantity of motion can be defined as the product between the mass of the object and its speed. This means, if the object is heavy, it has a lot of mass, therefore it will have more momentum. On the other hand, if it's a light object, it won't have greater momentum.

So, in this context both blocks have different mass, and according to Momentum's definition, the block with more mass, will have more momentum.

Therefore, the answer is the second option.

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A flat metal washer is heated. As the washer's temperature increases, what happens to the hole in the center? A flat metal washe
jenyasd209 [6]

answer;

The hole in the center of the washer will expand

explanation;

<em>A flat metal washer is heated. As the washer's temperature increases, what happens to the hole in the center? A flat metal washer is heated. As the washer's temperature increases, what happens to the hole in the center? The hole in the center will remain the same size. Changes in the hole cannot be determined without know the composition of the metal. The hole in the center of the washer will expand. The hole in the center of the washer will contract.</em>

this is an example of area expansivity.

coefficient of area expansivity is change in area per area per degree rise in temperature

a=dA/(A*dt)

as the temperature rises , there will be volumetric and area expansivity on the body. volume also increases because of the intermolecular forces of attraction between the molecule is now getting apart.

7 0
2 years ago
A flywheel with a very low friction bearing takes 1.6 h to stop after the motor power is turned off. The flywheel was originally
nadezda [96]

Answer: 5.76 rads/s

Explanation:

The initial rotation is 55 rpm

1 rev = 2π radians

55 revs = 55 × 2π/1 = 345.58 radians/min

345.58 rads/min = 345.58rads/60s = 5.76 rads/s

3 0
2 years ago
Sea level is currently rising at 3.2 mm/yr, and scientists predict that global warming could cause a rise in sea level of 7 m if
Dovator [93]

Answer:

2188 years

Explanation:

given,                                              

see level rising at the rate = 3.2 mm/yr

height of the sea level to rise = 7 m        

time it will take rise 7 m = ?              

we know,                                      

           1 m = 1000 mm                          

           1 mm = 0.001 m                          

rate of increase of rate = 0.0032 m/year                  

time taken to rise = \dfrac{7}{0.0032}\ years

                             = 2187.5 years                                    

Now, time taken by the sea level to rise 7 m is equal to 2188 years.

7 0
2 years ago
Three wires are made of copper having circular cross sections. Wire 1 has a length l and radius r. Wire 2 has a length l and rad
Alex73 [517]

Explanation:

Below is an attachment containing the solution.

4 0
2 years ago
A runner generates 1260 W of thermal energy. If this heat has to be removed only by evaporation, how much water does this runner
sergey [27]

Answer:0.502kg

Explanation:

F4om the relation

Power x time = mass x latent heat of vapourization

P.t=ML

1260 * 15 *60 = M * 22.6 * 10^5

M= 1134000/(22.6 *10^5)

M=0.502kg=502g

3 0
2 years ago
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