7. what is the temperature 32 degrees fahrenheit in degrees celsius? a. 10°c b. –10°c c. 0°c d. 20°c

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

An atom that has gained or lost electrons is called an _

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.