The Earth rotates 1 time every 24 hours….. A. How many RPM’s is this?
B. What is the velocity of a person standing on the surface of the Earth 6,378,000 m from the center?

Aball bearing at 220.0 °c is dropped into a cup containing 250.0 g of water at 20.0 °c. the water and ball bearing come to a temperature of 30.0 °c. what is the heat capacity of the ball bearing in j/°c? (hint: how are the algebraic signs of q related for the ball bearing and the water? )

Which of the following is not an appropriate unit for acceleration? (kg/12 mihr? m/min/sec cm/30c?

Which of the following is the largest disadvantage of about half of the electricity in the united states comes from burning