3) Change in Temperature
Temperature light on C Temperature light off °C
Time
Time
Sand Water
Sand Water
(min)
(min)
Start 22 22 Start 58 30
1 26 24 1 52 30
5 36 26 5 46 30
10 44 28 10 36 28
15 58 30 15 26 26
Josh did an experiment recording the changes in temperature in sand and water when exposed to a light source, and then when
the light source was removed. Josh noticed that the sand heated up faster than the water and then cools faster than the water.
Josh concludes that
-1)
A)
sand is the better insulator
B)
water is the better conductor
water is the better insulator.
D)
sand has a higher heat capacity

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.