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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

PhysicsMediumsingle choice

The height of a waterfall is 84 m. Assuming that the entire kinetic energy of the falling water is converted into heat, the rise in the temperature of the water will be ( $g = 10$ m $s^{- 2}$ , $J = 4.2$ joule/cal):

Options:

Answer:

Solution:

$m g h = m s Δ T$ with $s = 4200$ J $k g^{- 1}$ $K^{- 1}$ . $Δ T = \frac{10 \times 84}{4200} = 0.2^{\circ}$ C. A.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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