The rear window of a van is coated with a layer of ice at 0°C. The density of ice is 917 kg/m3, and the latent heat of fusion of
1 answer:
Answer:
thickness of ice melted = 1.242*10^{-3} m
Explanation:
power delivered = V*I = 12 * 28 = 336 Watts
.
heat delivered = power * time = 336 W * 300 seconds = 168000 Joules
.
mass of ice melted
mass of ice melted = 97200 J / 335000 J/kg = 0.5014 kg
.
volume of ice melted = mass / density = 0.5014 / 917 = 5.46*10{-4} m3
.
thickness of ice melted = volume / area = 5.46*10{-4} / 0.44 = 1.242*10^{-3} m
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Here,
v = Velocity
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T = Tension
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As we know that speed is equivalent to displacement in a unit of time, we will have to
Therefore the tension is 5.54N