Question

Help!!! Please explain why you chose the answers too pls:

#1. What best describes what happens when the end of the hose of a running vacuum cleaner is placed on your arm?

A. Your skin moves in the direction of negative pressure, partially into the end of the hose.

B. The vacuum cleaner pulls your skin partially into the end of the hose.

C. Your skin pushes itself partially into the end of the hose.

D. The surrounding atmosphere pushes your skin partially into end of the hose.

#2. An expanding ideal gas

A. has work done on it by the environment and the work is (by convention) positive

B. has work done on it by the environment and the work is (by convention) negative.

C. does work on the environment and the work is (by convention) negative.

#3 In an ideal gas, the change in thermal energy when the temperature changes by ∆T is

A. depends on W.

B. Identical for any process.

C.  different for all processes.

#4. Container "A" holds an ideal gas that undergoes a constant-volume process and experiences a temperature change of ∆T. Container "B" holds the same amount of the same ideal gas that undergoes a constant-pressure process and experiences the same temperature change ∆T.

A. The gas in container A experiences a larger change in thermal energy.

B. The gas in containers A and B experience the same change in thermal energy.

#5 For a monatomic ideal gas, temperature is proportional to

A.the atomic mean free path

B.the square of the average atomic velocity

C.the average atomic velocity