Question

14. From what height should a piece of ice fall
upon the ground so that it is completely melted,
assuming that all the heat produced remains in
ice? (Latent heat of ice= 80 cal/g, J=4.2
joule/calorie, g=9.8 N/kg) Ans. 34.28 km​

Answer 1

Given :

- g = 9.8 N/kg

- L = 80 cal/g = 336 kJ/kg

To Find :

- Height

Concept :

- Energy conservation

Calculation :

Potential Energy = Heat of Latent

mgH = mL

gH = L

so, H = L/g = 336/9.8 = 34.28 km

#AnswerWithQuality

#PhysicsLOVER