What quality of car wax allows it to protect the car's finish from the rain? very polar
nonpolar
basic to neutralize the rain pH
acidic to neutralize the rain pH

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above