Churchill’s speech was meant to inspire the British people to continue fighting in the war, and to protect and fight for the survival of their empire and everything they stood for, and to do this as a united nation against their opponent.
The change in temperature is greater when the water is heated with the use of the fire caught by the food substance, then the energy content in the food substance is higher because the heat energy is greater, since the heat energy is absorbed by the water when the fire is kept under the test tube containing water. The formula indicates that if the change in temperature is greater when the mass of the substances and the volume of water are constant, then the heat energy is higher.
