In order to cool 1 ton of water at 20°c in an insulated tank, a person pours 140 kg of ice at –5°c into the water. the specific heat of water at room temperature is c = 4.18 kj/kg· °c, and the specific heat of ice at about 0°c is c = 2.11 kj/kg°c. the melting temperature and the heat of fusion of ice at 1 atm are 0°c and 333.7 kj/kg.

Explanation:

1 ton = 907.2 kg

so here heat given by water = heat absorbed by the ice

so by energy balance we will have

so we have

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.