Advertisements
Advertisements
प्रश्न
Running water possesses ______.
पर्याय
potential energy
chemical energy
kinetic energy
sound energy
उत्तर
Running water possesses kinetic energy.
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
In an electric fan, electrical energy changes into the mechanical energy.
What is potential energy ? State its unit.
State two factors on which the potential energy of a body at a certain height above the ground depends.
Tick the most appropriate answer.
The force applied on a machine to do work is called the
Answer the following in short.
What do you understand by the term efficiency of a machine’?
Name the quantity whose unit is :
(a) kilowatt
(b) kilowatt-hour
A certain household consumes 650 units of electricity in a month. How much is this electricity in joules?
- Take two aluminium channels of different lengths.
- Place the lower ends of the channels on the floor and hold their upper ends at the same height.
- Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.
- At the moment of releasing the balls, which energy do the balls have?
- As the balls roll down which energy is converted into which other form of energy?
- Why do the balls cover the same distance on rolling down?
Note: The question is wrong. It should be "Why do the balls cover the same distance after rolling down"? - What is the form of the eventual total energy of the balls?
- Which law related to energy does the above activity demonstrate? Explain.
Which one of the following requires wind energy?
Which one of the following is not the unit of energy?