• State the relation between commercial unit of energy and joules .!
  • How much work is done on a body of mass 1kg whirling on a p ath of radius 5m ?
  • If an object is immersed wholly in a liquid causing upthrust equal to the weight of the body then what will be the relation between the relative densities of liquid and the object ?

 Ans 1- Commercial Unit Of Energy = kWh

             SI Unit Of Energy = Joule (J)

1 kWh = 1 kW x 1 h

=> 1000 W x 3600 s

1 watt - second = 1 joule

1 kWh = 3600000 J

Ans 2- ZERO(0)

Ans 3-

RELATIVE DENSITY = DENSITY OF SUBSTANCE/ DENSITY OF WATER

SINCE UPTHRUST AND THE WEIGHT OF THE BODY ARE EQUAL, THEREFORE, THE RELATIVE DENSITIES WILL BE THE SAME...

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