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प्रश्न
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
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उत्तर
Submarines are provided with ballast tanks. When required to dive, the water is allowed to enter the tanks. And when required to sail, the water is forced out by compressed air.
Work is a scalar quantity.
संबंधित प्रश्न
How is work related to energy?
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
In case of negative work, the angle between the force and displacement is :
Its moment of a force scalar or a vector quantity?
What is the ratio of SI units to CGS units of 'work'?
A woman pulls a bucket of water of total mass 5 kg from a well which is 10 s. calculate the power used by her.
Is power a scalar or a vector quantity?
Name the material commonly used for the manufacturing of solar cells.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A green plant is carrying out photosynthesis.
