D, you wanna know why.... cause I looked it up
Answer:
Explanation:
Friction force to find the speed of the block at the instant of collision so
Solve to v' to find the velocity
The speed of the block at the instant of collision with the spring is
Answer:
we cannot view through an opague object since it does not alow light through but only cast shadows
Explanation:
Frequency of a sound wave is commonly referred to as pitch. That is the specialized name for frequency of a sound wave.
Just remember it as pitch.