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There are always losses in using energy. Some examples:
1. A car engine uses only 30-40 percent of the energy in the gasoline, the rest is rejected in the radiator and the exhaust
2. An electric motor is better at using most of the electric power supplied, but still loses some energy in heating of the motor windings and in friction of the bearings
3. Boiling an electric kettle-you might think that all the electric power is used to heat the water, but some must be lost from the outside of the kettle to the surrounding air.
Generally machines always lose some heat which is not usefully used, by thermal losses to the environment or by internal friction
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Wiki User
∙ 12y ago
Wiki User
∙ 14y agoThere are always losses in using energy. Some examples:
1. A car engine uses only 30-40 percent of the energy in the gasoline, the rest is rejected in the radiator and the exhaust
2. An electric motor is better at using most of the electric power supplied, but still loses some energy in heating of the motor windings and in friction of the bearings
3. Boiling an electric kettle-you might think that all the electric power is used to heat the water, but some must be lost from the outside of the kettle to the surrounding air.
Generally machines always lose some heat which is not usefully used, by thermal losses to the environment or by internal friction.
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What has more energy something hot or something cold?
Hot things have more energy than cold one.
What does low energy mean?
low energy is when a product or object does not "consume" as much energy than a normal "object". for instance, an energy saving bulb will use less energy than a normal bulb.
Where do we get heat?
We get heat energy whenever more than one molecules or atoms come into contact with each other.
If a human is considered energy and energy cannot be destroyed what happens to the energy from a person when they die?
A statement like "human is energy" is probably more of a philosophical statement than a physical one. In other words, we would be talking about something different than what the physicist calls "energy". If you refer to the physical energy, it will of course stay in this Universe.
Why a sound wave with a large amplitude is more likely to damage your hearing than one with a small amplitude?
Because the amplitude is what decides how much energy there is in the wave. Large amplitude = lots of energy. And lots of energy hitting something(like your ear) is more likely to do damage than a little energy hitting something.
What has more energy something hot or something cold?
Hot things have more energy than cold one.
If you dream about something more than once does it come true?
No.
How come your little sister has more energy than you?
It could just be because she is younger than you.
Why does a top footballer need more energy in their diet than you do Where does this energy come from?
A top footballer needs more energy in their diet than we do because they play football all the time and train everyday, so they are more active than us. The energy comes from the fat in the food.
Why do you need to become efficient?
because that means less energy is used. if something is more efficient than something else it is so because it can either use less energy to do the same thing or the same amount of energy to do more
What can come from splitting the nuclei of atoms?
More nuclei of more atoms than you started out with, less mass than you started with, and some energy.
What does low energy mean?
low energy is when a product or object does not "consume" as much energy than a normal "object". for instance, an energy saving bulb will use less energy than a normal bulb.
Does warm or cold water have more kinetic energy?
well considering kinetic energy is the energy something has when it is moving than i would say cold because it runs more and drips faster
Geothermal Energy would be more productive than the more common energy sources that come from the Earth?
No. It's just another untapped resource that we should be using.
Does it take more calories to eat an apple than are in an apple?
No because when you eat something slowly, in this case its a apple, it doesn't take that much energy to eat and the more energy you have the more calories you lose
When you go on different planets it takes more energy to move something than it is on Earth Is it more gravity or less gravity?
Other planets have more or less gravity than Earth, so the energy needed to move things around is also more or less.
Where do we get heat?
We get heat energy whenever more than one molecules or atoms come into contact with each other.
