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A ball sitting on the top of a table has potential energy however no kinetic energy. How do potential and kinetic energy change as the ball falls off the table to the floor?
1. Both its potential energy and its kinetic energy decrease.
2. Its potential energy increases, and its kinetic energy decreases.
3. Both its potential energy and its kinetic energy increase.
4. Its potential energy decreases, and its kinetic energy increases.
A technician wraps wire around a tube of length 40 cm having a diameter of 7.7 cm. If the current in this solenoid increases at the rate of 3 A/s, what is the self-induced emf in the solenoid
A daring ranch hand sitting on a tree limb wishes to dropvertically onto a horse galloping under the tree. The constantspeed of the horse is 13.0 m/s, How long is he in the air
A playground merry-go-round made in the shape of a solid disk, hasa diameter of 2.74 m and a mass of353.7 kg. Two children, each of mass30.2 kg, sit on opposite sides at the edgeof the platform. Approximate the children as point masses.
A uniform electric field exists between two conducting plates separated by 1.7mm . A dust grain with charge 65 nC between the plates feels a 26N electric force, Find the electric field
A proton moves at 1.0x10^7 m/s perpendicularly to a uniform magnetic field. Determine the magnitude and direction of the field
A step-up transformer has 24 turns on the primary coil and 780 turns on the secondary coil. what input current and voltage are needed
at 16 degrees celsius the carbon resistor in an electric circuit connected to a 3.2 v battery has a resistance of 194
A storage tank 23 m high is filled with pure water. (Assume the tank is open and exposed to the atmosphere at the top.), Find the gauge pressure at the bottom of the tank
A 1.6 kg disk with radius 0.63 m is rotating freely at 55 rad/s around an axis perpendicular to its center. A second disk that is not rotating is felled onto the first disk so that their centers align, and they stick together. The mass of the second ..
An injured monkey sits perched on a tree branch 3.0 m above the ground, while a wildlife veterinarian is kneeling down in the bushes 88.5 m away attempting to subdue the monkey with a tranquilizer gun.
The triceps muscle in the back of the upper arm extends the forearm. What is the moment of inertia of the boxer's forearm
The parachute on a race car of weight 8130 N opens at the end of a quarter mile run when the car is traveling at 30.7 m/s. What total retarding force must be supplied by the parachute
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