A 23000 kg railroad freight car collides with a stationary caboose car. They couple together, and 18 percent of the initial kinetic energy is lost. What is the mass of the caboose

5048.78kg

Explanation:

Given and , From the law of conservation of momentum we have:

Hence,

Since 18% of initial is lost:-

Therefore, by substituting with :

The mass of the caboose is 5048.78kg

spectral lines lyman is one set

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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