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8. which of the following is a true statement
describing how a van de graaf generat...
Physics, 28.10.2019 22:31 dean111375
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8. which of the following is a true statement
describing how a van de graaf generator
works?
a. negative charges are deposited on the
belt, which deposits positive charges
on the metal ball.
b. positive charges are deposited on the
belt, which deposits negative
charges on the metal ball.
c. negative charges are deposited on the
belt, which deposits negative charges
on the metal ball.
d. positive charges are deposited on the
belt, which deposits positive
charges on the metal ball.
Answers: 1
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Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.
Answers: 2
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Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.
Answers: 1
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The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.
Answers: 2
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