Using the text and the lab results, can you identify the TRUE statements?
The instantaneous speed of the car at 40 cm was about 2cm/sec.
The speed of the car increased during the 100 cm trip.
The straight line in the graph indicates that the speed during the trip was constant.
Every two seconds the wind-up car moved about 20 cm.
The data tells us that it takes the wind-up car about 50 seconds to travel 100 cm.

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Which of the following are appropriate acceleration units?

If the area of a square has increased by a factor of 16, by how much has each side increased?