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प्रश्न
Give an example
Electrical energy changes of sound energy.
एक शब्द/वाक्यांश उत्तर
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उत्तर
Electric bell
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संबंधित प्रश्न
No work is done by a force if the body
Define the term energy.
Define the term 'work'. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
In case of negative work, the angle between the force and displacement is :
Choose one or more correct alternatives.
For work to be performed, energy must be ______.
- transferred from one place to another
- concentrated
- transformed from one type to another
- destroyed
Name the physical quantity whose SI unit is Nm.
Name the practical unit of power.
A horse exerts a pull on a cart of 300 N so that the horse-cart system moves with a uniform speed 18 km/h on a level road. Calculate the power developed by the horse in watt and also find its equivalent in horse power.
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
