Question

A hanging weight with a mass of m = 14.0 kg falls a distance of h = 8.1 m causing paddles to turn in a tank of water. If the mass of the water is mw = 0.5 kg, what is the maximum possible change in the temperature of the water?

Answer 1

Options:
T = 5.74o C
T = 0.019o C
T = 0.53o C
T = 0.68o C

Answer 2

The weight has a reduction of potential energy as it falls. This potential energy change is given by what equation? Hint: think gravitational potential energy.

Answer 3

dont know it

Answer 4

m*9.8*h=111.32

Answer 5

1111.32

Answer 6

what class are you taking?

Answer 7

i got it

Answer 8

now what

Answer 9

Right mgh

Answer 10

If (and that is a big "if") all of that energy lost in the change in gravitational potential energy were somehow converted into heat energy to heat water, what equation would you use to relate a heat energy input to a change in temperature of the water?

Answer 11

No thoughts?

Answer 12

Have you studied thermodynamics?

Answer 13

Does the equation:\[Q=mC \Delta T\]
ring a bell?