A 5 g dart is shot with a speed of 400 m/s into a 2.3 kg block initially at rest attached to a 120 N/m spring and gets lodged in the block. Friction is negligible. a. Find the amplitude of the dart-block system.
b. Find the speed of the dart-block system when it return to equilibrium.
c. Find the period of the dart-block system.

their crystal patterns have been disrupted by stress

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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1 is a answer of a question

metals only

metalloids only

nonmetals only

metal and metalloids

metalloids and nonmetals