A 5-kg block is suspended by a rope from the ceiling of an elevator that accelerates downward at 3.0 m/s 2. The tension force of the rope on the block is: A. 64 N, down
B. 15 N, up
C. 34 N, up
D. 34 N, down
E. 64 N, up

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

If we relied solely on the nonrenewable resources found in the u. s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal

Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm