2. Two athletes, red shirt green shirt, play a game of catch. Red shirt stands on the origin "0.0", to begin. Green shirt stands at +5.0 m, or to the right of red shirt. The game begins
with red shirt holding the ball. The ball makes the following motions during the game:
1st pass: 5.0 meters right
2nd pass: 8.0 meters left
3rd pass: 3.0 meters right
4th pass: 6.0 meters left
5th pass: 150 meters right
6th pass: 4.0 meters left

a. Calculate the total displacement of the ball from the origin:
b. Calculate the total distance the ball traveled.
c. Calculate the total distance traveled by the athlete "red shirt" on the left:
d. Calculate the total displacement of the athlete "green shirt" on the right

In a thunderstorm, charge builds up on the water droplets or ice crystals in a cloud. thus, the charge can be considered to be distributed uniformly throughout the cloud. for the purposes of this problem, take the cloud to be a sphere of diameter 1.00 kilometer. the point of this problem is to estimate the maximum amount of charge that this cloud can contain, assuming that the charge builds up until the electric field at the surface of the cloud reaches the value at which the surrounding air breaks down. this breakdown means that the air becomes highly ionized, enabling it to conduct the charge from the cloud to the ground or another nearby cloud. the ionized air will then emit light due to the recombination of the electrons and atoms to form excited molecules that radiate light. in addition, the large current will heat up the air, resulting in its rapid expansion. these two phenomena account for the appearance of lightning and the sound of thunder. take the breakdown electric field of air to be eb=3.00ă—106n/c. part a estimate the total charge q on the cloud when the breakdown of the surrounding air is reached. express your answer numerically, to three significant figures, using ďµ0=8.85ă—10â’12c2/(nâ‹…m2) .

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You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?