Water's heat of fusion is 80 cal/g. its specific heat is 1.0 cal/g degrees celsius, and its heat of vaporization is 540 cal/g. a canister is filled with 330g of ice and 100g of liquid water, both at 0 degrees celsius. the canister is placed in an oven until all the water has boiled off and the canister is empty. how much energy in calories was absorbed?

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

A40.0 l tank of ammonia has a pressure of 12.7 kpa. calculate the. volume of the ammonia if it’s pressure is changed to 8.4 kpa while its temperature remains constant.

Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. what is the force exerted by the moon on the same object? what is the force the earth exerts on it?