- 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 kWh = 3600000 J
=> 1000 W x 3600 s1 watt - second = 1 joule
1 kWh = 3600000 J
Ans 2- ZERO(0)
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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