A 1.3-kg block is pushed up against a stationary spring compressing it a distance of 4.2 cm. When the blocks spring is released, the spring pushes it away across a friction less horizontal surface. What is the speed of the block, given that the spring constant is 1400 N/m

choosing tennis and golf balls is your inde choice.

their mass and volume are dep

truck y has a greater velocity than truck x.

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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