Kuiper belt objects are composed of which substances? select all that apply.
a. iron
b. silicon
c. water
d. methane
e. ammonia

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Acrow drops a 0.11kg clam onto a rocky beach from a height of 9.8m. what is the kinetic energy of the clam when it is 5.0m above the ground? what is its speed at that point?

Observations show that interstellar clouds can have almost any shape and