A man walks 7 km East in 1 hours and then 2.5 km West in 0.5 hour. What is the man's average velocity for the whole journey?

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.

Explain what will happen if decomposers were apsent from a forest ecoysystem.

Distinguish between linear momentum and angular momentum