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Friction changes the useful work of a machine into mechanical energy true or false?
true
What does energy efficiency?
Energy conversion efficiency is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The useful output may be electric power, mechanical work, or heat.
How useful are wind turbines?
The wind turbines is a machine that converts the kinetic energy in wind into mechanical energy. If the mechanical energy is used directly by machinery, such as a pump or grinding stones, The machine is usually called a windmill. If the energy is then converted to electricity, the machine is called a wind generator, wind turbine, or wind energy converter.
Why you convert chemical energy into mechanical energy?
Chemical energy in its form is not very useful. Thus to use it better and more efficiently, it is converted to mechanical energy.
Can a machine be useful even if its mechanical advantage is less than 1?
yes
What percentage of energy is converted into useful energy?
It depends on the efficiency of the machine. No machine is perfect and there are always losses and waste. Usually the losses are a greater percentage than the useful energy.
What is the energy transform that happens in the generator?
The generators transfer mechanical energy into very useful electrical energy.
What way is mechanical energy useful to us?
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In what way is mechanical energy useful to us?
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What is an efficiency ratio?
The efficiency ratio for a machine usually refers to the ratio of the useful energy available from a machine and the energy put into it.
What is true about any mechanical system?
The useful energy output is always less than the energy input.
In a collision what is conserved?
Momentum is conserved in a collision. If two cars have the same mass and are traveling at the same speed and collide headfirst, the momentum of both cars cancel each other out and they will be motionless. If one has greater speed or mass than the other, it will still have the difference in momentum after the collision.
