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प्रश्न
1 J = ______ calorie.
उत्तर
1 J = 0.24 calories.
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संबंधित प्रश्न
Define work.
Write the expression for work done by a force.
A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power of the pump required.
(Take g = 10 N kg-1 and density of water = 1000 kg m-3)
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
The power of a motor is 40 kW. At what speed can the motor raise a load of 20,000 N?
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
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.
The work done on an object does not depend on the :
The work done on an object does not depend on ______.
Is work done a scalar or a vector physical quantity?
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
Give two examples of work done.
Give an example
Electrical energy changes to heat energy.
Name the material commonly used for the manufacturing of solar cells.
The weights of two bodies are 2.0 N and 2.0 kgf respectively what is the mass of each body?
A is a push or a pull ______.
A man squatting on the ground gets straight up and stand. The force of reaction of ground on the man during the process is ______.
