At Point A, the beginning of the observations, the substance exists in a solid state. 1. The material in this phase has Fixed
volume and
Fixed
shape
2.
With each passing minute,
Heat
is added to the substance.
3.
This causes the substance to
more rapidly which we detect by a
collide
Temperature rise in the substance.
4
Melt
At Point B, the temperature of the substance is
°C. The solid begins to
or in a
state
5. At Point C, the substance is completely
liquid
Fixed
volume and
no definite shar
.
6. Material in this phase has
7. The energy put into the substance between 5 and 9 minutes was used to convert the substance from a
Solid
to a
This heat energy is called the latent heat of fusion
of the substance.
8. Between 9 and 13 minutes, the added energy increases the
liquid

Amass m = 74 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius r = 18.4 m and finally a flat straight section at the same height as the center of the loop (18.4 m off the ground). since the mass would not make it around the loop if released from the height of the top of the loop (do you know why? ) it must be released above the top of the loop-the-loop height. (assume the mass never leaves the smooth track at any point on its path.) 1. what is the minimum speed the block must have at the top of the loop to make it around the loop-the-loop without leaving the track? 2. what height above the ground must the mass begin to make it around the loop-the-loop? 3. if the mass has just enough speed to make it around the loop without leaving the track, what will its speed be at the bottom of the loop? 4. if the mass has just enough speed to make it around the loop without leaving the track, what is its speed at the final flat level (18.4 m off the ground)? 5. now a spring with spring constant k = 15600 n/m is used on the final flat surface to stop the mass. how far does the spring compress?