Explain how geothermal energy shows the flow of thermal energy from hot to cold or cold to hot

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same

Of is j/kg·k. if a 2.6 kg of isk to k,is ?