Currently, LEDs (light emitting diodes) are the lowest energy consumption lights. Unfortunately, they are harder to manufacture and therefore are more expensive that traditional lights.
It is a light source.
The energy that a battery gives to each coulomb of charge is equal to the voltage of the battery, measured in volts. This energy is used to move the charge through a circuit. The energy that this charge gives to the load is determined by the resistance of the load and the current flowing through it, according to Ohm's Law (E=IR). The relationship between the battery's voltage and the load's resistance and current ultimately determines the efficiency of energy transfer in the circuit.
A land is indirectly a source of energy. It is a renewable source of elements that gives, among other benefits, energy to the living creatures, the lively beings.
it gets eaten by a tiny monster inside the battery which gives energy to the appliance
Yes because the acid inside the battery gives it power.
It gives the battery the ability to store energy over a long period of time.
ummm... probably the sun
Animals obtain energy by what they eat. It is all a big cycle, the sun(main source of energy) gives energy to the grass which gives energy to the cow, though in smaller amounts.
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.
An object that gives out heat energy is called a heat source. Examples include a stove, heater, or fireplace.
An energy feed is a food source that gives extra energy to those who eat it, allowing them to expend more energy when needed.
That depends on the watch. In some watches, you wind them, and the energy is stored in a spring. In most modern watches, the energy is stored in a battery.