A cooling curve for a certain mass of molten candle wax is given below. 55
50
45
Temperature (°C)
B
40
A
30
2
4
5
6
8 9
10 :
12
nts
13
15
Time (minutes)
(1) Why is the temperature on the graph constant between A and B?
(ii) Use the graph to find the melting point of candle wax.

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.