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A small plastic sphere with a charge of -7.5 nC is near another small plastic sphere with a charge of +11 nC. If the force between the spheres has a magnitude of 8.8×104 N, what is the distance between the spheres? What kind of force is this?
A physics student in a hot air balloon ascends vertically at constant speed. suppose the following four forces that arise in this situation.
q1. a 4.00-kg model rocket is launched expelling 54.9 g of burned fuel from its exhaust at a speed of 690 ms. what is
Waves on a 10 meter rope travel at 19 m/s. You shake the rope back and forth until you get a standing wave with a single antinode. What is the wavelength and frequency of each standing wave
What is the electric force between a glass ball with 2.0 µC of charge and a rubber ball with-4.5 µC of charge when they areseparated by 5 cm? (N)
A 1100 kg car is moving at a speed of 40.0 m/s. How much work is required to bring the car to rest
A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a tightly wound inner core. what is the angular speed of the spool
A crate of mass 47 kg is pushed across a level floor by a person. what is the work done by the person
A hydraulic jack for changing car tires is designed with a primary cylinder (the one you push down on) 1 cm in diameter and a secondary cylinder (the one that pushes up on the car) 5cm in diameter. how much force acts to lift the car
A ball m=1kg rolling without slipping on a flat surface with v=.1m/s strikes the wall after which v=.08m/s
A 2kg ball traveling to the right with a speed of 4 m/s collides with a 4 kg ball traveling to the left with a speed of 2 m/s. The total momentum of the two balls after the collision is what.
A car weighing 12 kN is driving due north at 30.0 m/s. After driving around a sharp curve, the car is moving east at 30.0 m/s. What is the change in momentum
A rock is dropped into an abandoned mine, and a splash is heard 4s later. how fast the rock was falling when it hit the water
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