yes because some ovens don't use natural gas and because some people use electric microwaves
that's why the answer is yes
No. But it does require a transfer of heat energy. So the evaporation of sweat cools you.
electrical energy in the heating elements is changed to heat and light. Only the heat is useful in heating the water.
electrical energy in the heating elements is changed to heat and light. Only the heat is useful in heating the water.
In cold weather the water boiler which provides central heating and water heating uses the most energy.
Water flowing downhill does not require energy, only the force of gravity.
That is related to energy required for heating. If you require energy to keep your house warm, a draft can take energy out - replacing hot air with cold air. This will require more heating. In summer, the situation is similar - except that the wasted energy is related to air-conditioning, and that cool air will be replaced with warm air.
Natural gas is used as a source of heat, from heating homes, to heating water, when something is burned it gives of energy, heat is a form of energy.
If you take energy in the form of heat, from water it will freeze and so is not water any more.
It probably does require more energy to keep water hot continuously rather than heat it from cold when needed; however, heating from cold is generally not feasible in everyday household water heaters because of the time required. Heating from cold will also waste a significant amount of drinking water unless you have an advanced newer heating system, because you will have to let the water run in order to heat it up.
More water molecules gain energy and can escape from the liquid.
Cooking and heating water, for example, use energy every day.
Some may have a water heating element inside of them, so they are not dependent on having hot water available.