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A block having mass of 2 kg is pulled ov...

A block having mass of 2 kg is pulled over a horizontal surface at a constant velocity of `20 km cdot h^(-1)`. If the frictional coefficient is 0.5, calculate the amount of heat produced in 1 h. If 50% of the heat produced i absorbed by block, what will be the increase in its temperature? Specific heat of the body = `0.1 cal cdot g^(-1) cdot^(@)C^(-1)`.

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The correct Answer is:
`5.83 xx 10^(5) cal, 116.4^(@)C`
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CHHAYA PUBLICATION-FIRST AND SECOND LAW OF THERMODYNAMICS-Exercise - Hots Numerical Problems (Marks 3/4/5)
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  8. Two cylinders A and B of equal capacity are connected to each other vi...

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  10. Two cylinders A and B of equal capacity are connected to each other vi...

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  11. Two cylinders A and B of equal capacity are connected to each other vi...

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  12. The temperature of 10 g nitrogen gas is increased from 20^(@)C to 120^...

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  13. The temperature of 10 g nitrogen gas is increased from 20^(@)C to 120^...

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  14. Some amount of gas is compressed at STP in an (i) adiabatic process. W...

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  15. Some amount of gas is compressed at STP in an (ii) isothermal process ...

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  16. The initial volume of a gas is 2m^(3). When the gas is compressed adia...

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  17. Some amount of gas is compressed adiabatically at 27^(@)C and standard...

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  19. The specific heat of air at constant volume is 0.1684 cal cdot g^(-1) ...

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