Advertisements
Advertisements
प्रश्न
Name the quantity which is measured in kW.
उत्तर
kW - Kilowatt is the unit of POWER.
संबंधित प्रश्न
Power P= ............ /time taken.
1 H.P. is equal to
It takes 20 s for a girl A to climb up the stairs while girl B takes 15 s for the same job. Compare the work done .
A wind-powered generator converts wind energy into electric energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electrical energy. For wind speed v, the electrical power output will be proportional to ______
Arrive at an expression for power and velocity. Give some examples for the same.
A bullet of mass 20 g strikes a pendulum of mass 5 kg. The centre of mass of the pendulum rises a vertical distance of 10 cm. If the bullet gets embedded into the pendulum, calculate its initial speed.
An engine pumps up 200 kg of water through a height of 20 m in 10 seconds. If the efficiency of the engine is 80%. Calculate the power of the engine.
Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input energy. How much power is generated by the turbine? (g = 10m/s2)
The average work done by a human heart while it beats once is 0.5 J. Calculate the power used by heart if it beats 72 times in a minute.
Name the quantity which is measured in Wh.