Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumsingle choice

A waterfall is 84 m high. If half the falling water kinetic energy becomes heat, the water temperature rise is:

Answer:

Solution:

$m c Δ T = \frac{m g h}{2}$ . Use $g = 9.8 m s^{- 2}$ and $c = 4200 J kg^{- 1} K^{- 1}$ .

$Δ T = \frac{0.5 ( 9.8 ) ( 84 )}{4200} = 0.09 8^{\circ} C .$

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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