Answer:
B
Explanation:
Density is about how closely compact molecules are. (^-^)
Answer:
Explanation:
The fundamental charge of a single electron is 
.
If there are 10 excess electrons, the net charge that would be measured should be 10 times the fundamental charge of a single electron:
Answer:
210
Explanation:
A ball rolls horizontally off the cliff at a speed of 30 m/s. It takes 7 seconds for the ball to hit the ground. What is the height of the cliff and the horizontal distance traveled by the ball?
S = (1/2)*9.8 m/s^2 * 7^2 = 240.1 m if the ball is very dense so air resistance, and therefore terminal velocity, can be ignored.
S = v * t = 30 m/s * 7 s = 210 m for the horizontal distance, again assuming negligible air resistance.
