Which describes how fluids change as they travel through the convection zone? They change to solids near the Sun's surface. They change to solids near the Sun's radiation zone. They become more dense near the Sun's surface. They become more dense near the Sun's radiation zone.

Describe the path of the electric current through a circuit?

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

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.