Thermal grease to allow heat to transfer to the heat sink.
Heat must have to be applied to the ice cube.
heat is needed to disperse the atom.by Sarah Jane fundal
Two objects must be touching and it has to transfer heat
The energy must be applied to the phase change before it can heat the substance
They must undergo deposition then have heat and pressure applied. Sedimentary rocks are formed by the actions of chemical or mechanical processes.
The minerals in the sandstones usually recrystallize when it changes into quartzite. Heat must be applied to sandstone to change it into quartzite.
Burning charcoal is spontaneous, but not at room temperature. To start the combustion energy must be added (in the form of heat). Once the temperature of the charcoal reaches a certain temperature it reacts exothermically and releases heat. This heat of reaction is sufficient to locally heat more charcoal so that it burns continuously.
between the comp and the reversing valve
I guess none. Why? The given is that the water is boiling -- it is turning into vapor.
In convection heat you heat the air first and then use the hot air to heat yourself. In radiant heat, the energy must be radiated directly from the heat element to your body. Note that radiant is much more directional.
between the comp and the reversing valve
Energy in various way: for example heat.