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What is the useful and wasted energy in an electric heater a television an electric kettle headphones Thanks for your help?
The use ful energy from headphones would be sound , the wasteful would be battery power.
Why is sound energy wasted when a kettle is heated?
when th kettle is heating up it making a boiling sound throught the process. This is sounded energy that is not being used hence wasted sound energy
Is a boiling kettle useful or wasted energy?
Wasted, unless you specifically want to produce a lot of steam.
What is the wasted energy for a kettle?
By the fact that the kettle is hot. The heat energy is also warming the metal of the kettle. By the fact that the water boils to steam,; loss of water to steam. The energy should only heat the water to boiling point, and not heat the kettle nor allow the water to boil off.
What energy is wasted in a microwave?
Electric energy. Some turn to heat in the machine, some turn to noise.
What is the useful and wasted energy in an electric heater a television an electric kettle headphones Thanks for your help?
The use ful energy from headphones would be sound , the wasteful would be battery power.
Why is sound energy wasted when a kettle is heated?
when th kettle is heating up it making a boiling sound throught the process. This is sounded energy that is not being used hence wasted sound energy
Is a boiling kettle useful or wasted energy?
Wasted, unless you specifically want to produce a lot of steam.
What is the wasted energy for a kettle?
By the fact that the kettle is hot. The heat energy is also warming the metal of the kettle. By the fact that the water boils to steam,; loss of water to steam. The energy should only heat the water to boiling point, and not heat the kettle nor allow the water to boil off.
What energy is wasted in a microwave?
Electric energy. Some turn to heat in the machine, some turn to noise.
What is the useful energy from an electric drill?
sound, also heat
How energy efficient are electric fireplaces?
Very little of the energy that goes to the electric fireplaces is wasted. However, as a heat source there are better, more efficient sources of heat.
Why is work output by a machine always less than the work input?
It is usually unavoidable that some energy is wasted.
Why in a real machine the output work is always less the input work?
In a real machine, part of the energy (or power) is always wasted.
How much energy is wasted for every 1000 megajoule?
It depends on the efficiency of the appliance. If an electric motor has an efficiency of 0.7, then for every 1000 megajoules, 30 megajoules will be wasted as useless heat or sound or other useless energy form.
Is it always easy to collect wasted energy and use it?
Once the energy is wasted, you can't convert it back to useful energy.Once the energy is wasted, you can't convert it back to useful energy.Once the energy is wasted, you can't convert it back to useful energy.Once the energy is wasted, you can't convert it back to useful energy.
What is the work output of a machine never equal to the work input?
It is usually less. The reason for this is that some energy is usually lost (wasted) in the machine.
