How much heat must be removed from 7.50 kg of water to freeze it at its melting point? use q = mass latent heat of fusion.
properties of water:
melting point= 0c
boiling point= 100c
cliquid= 4.18 kj/(kgc)
latent heat of fusion=333 kj/kg
latent heat of vaporization= 2260 kj/kg
a.17,000 kj
b.31.6 kj
c.7.50 kj
d.2500 kj

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Which is an example of an exothermic process?