In which scenario is an animal doing work? Check all that apply. A cat lifts up her kitten by its neck. A dog rubs his back against a large tree. A bird flies a worm from the ground to its nest in a tree. A goat butts its head against the barn wall. A horse pulls a wagon along a road.

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.

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?