Physics, 14.01.2020 13:31 victoriakraus6599
amy has a mass of 30 kg, and she is riding a skateboard traveling 5 m/s. what is her momentum?
a. 30 kg*m/s
b. 150 kg*m/s
c. 5 kg*m/s
d. 6 kg*m/s
when a bat hits a ball, the impulse is
a. the change in velocity multiplied by the force.
b. the mass multiplied by the acceleration.
c. the force multiplied by the time the objects are in contact
d. the mass multiplied by the force
a bowling ball has a mass of 6 kg. what happens to its momentum when it's speed increases from 2 m/s to 4 m/s
a. the initial momentum is 12 kg*m/s, and the final momentum is 24 kg*m/s.
b. the initial momentum is 12 kg*m/s, and the final momentum is 3 kg*m/s
c. the initial momentum is 6 kg*m/s, and the final momentum is 3kg*m/s
d. the initial momentum is 6 kg*n/a, and the final momentum is 12 kg*m/s
a baseball is traveling (+20 m/s) and is hit by a bat. it leaves the bat traveling (-30 m/s). what is the change in the velocity? remember that direction is what makes velocity different than speed.
a. 30 m/s
b. 50 m/s
c. 10 m/s
d. 20 m/s
a basketball has a mass of 1 kg and is traveling 15 m/s. how fast would a 5kg bowling ball have to travel to have the same momentum?
a. 3 m/s
b. 15 m/s
c. 1 m/s
d. 5 m/s
Answers: 3
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Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)
Answers: 2
Physics, 22.06.2019 14:30
Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates
Answers: 3
amy has a mass of 30 kg, and she is riding a skateboard traveling 5 m/s. what is her momentum?
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