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Energy that is not usefully transformed by the fan heater is wasted as what energy?
Sound Energy
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.
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
Is it true that every time energy changes form some of it is given off as unusable?
In almost all energy conversions, a portion of the energy is wasted. Always remember that energy is never lost but is converted to a form that is of no use in the application. For example, an electric motor uses electrical energy to rotate but a portion of the electrical energy is converted to heat - it's wasted because heat doesn't help the motor to rotate but it's still a form of energy. A different example, that of a car engine. Energy that is released by the chemical reaction of burning gas is used to move the car forward. A significant amount of the energy is changed to heat. That is obvious when you feel the engine getting warm as it runs. The heat is mostly unusable so it is wasted. In most energy conversions, a proportion if the energy turns to heat so rarely is there a conversion that is 100% efficient. An exception is an electric heater. In this case, all the electrical energy that is delivered to the heater is turned into heat. What would be wasted energy in other applications is all useful so it can be considered to be 100% efficient.
Energy that is not usefully transformed by the fan heater is wasted as what energy?
Sound Energy
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.
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.
Is it true that every time energy changes form some of it is given off as unusable?
In almost all energy conversions, a portion of the energy is wasted. Always remember that energy is never lost but is converted to a form that is of no use in the application. For example, an electric motor uses electrical energy to rotate but a portion of the electrical energy is converted to heat - it's wasted because heat doesn't help the motor to rotate but it's still a form of energy. A different example, that of a car engine. Energy that is released by the chemical reaction of burning gas is used to move the car forward. A significant amount of the energy is changed to heat. That is obvious when you feel the engine getting warm as it runs. The heat is mostly unusable so it is wasted. In most energy conversions, a proportion if the energy turns to heat so rarely is there a conversion that is 100% efficient. An exception is an electric heater. In this case, all the electrical energy that is delivered to the heater is turned into heat. What would be wasted energy in other applications is all useful so it can be considered to be 100% efficient.
Do you like your tankless water heater?
A tankless water heater can be advantageous because they are mostly instant and only the water needed is heated. They save energy because there is little energy wasted heating water that will not be used.
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.
