What form of energy is present in the food we eat?

What magnitude of electric current can store 2.5 J of energy in a 3 H induction coil?

A machine has an efficiency of 80%. If the input work is 200J, the output work is?

A wooden block of relative density 0.4 floats in a liquid of density 1600 kg m\(^{-3}\). What fraction of its volume is immersed?

Lining the walls of an auditorium with perforated materials reduces