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A drop is falling in a Millikan oil-drop apparatus when the electric field is off.
1. What are the forces acting on the oil drop, regardless of its acceleration?
2. If the drop is falling at constant velocity, what can be said about the forces acting on it?
A person is riding a bicycle, and its wheels have an angular velocity of 13.9 rad/s. What is the anguar acceleration (in rad/s2) of each wheel
A motorcycle and rider have a total mass equal to 295 kg. What is the net force on the motorcycle
The closest star to our solar system is Alpha Centauri, which is4.30 light years away. A spaceship with a constant speed of 0.800c relative to the Earthtravels toward the star. How much time would elapse on a clock on board the spaceship?
A long horizontal hose of diameter 3.2 cm is connected to a faucet. At the other end, there is a nozzle of diameter 1 cm. What is the velocity of the water in the hose
A mass of 0.25 kg is attached to a horizontal spring with a spring constant of 4.0 N/m. Write an expression for the position of the mass as a function of time
Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long climb. Illustrate what is the change in the car's kinetic energy, ΔKE = KEf - KE0, fro..
A small earthquake starts a lamppost vibrating back and forth. The amplitude of the vibration of the top of the lamppost is6.5 cm at the moment the quake stops, and8.6 s later it is 2.1 cm. What is the time constant for the damping of the oscillation..
A small steel ball bearing with a mass of 15 g is on a short compressed spring. Calculate the horizontal distance the ball will travel if the same spring is aimed 38° from the horizontal
A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.870 m/s encounters a rough horizontal surface of length script l = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.360 and..
An ideal gas expands at a constant total pressure of 2.5 atm from 3.45 L to 6.70 L. estimate the total work done by the gas in the process
A wire of unknown material has a cross-sectional area 7 mm2 and length 15 cm. What is the resistivity of the unknown material
A diver releases an air bubble of volume 2.0cm3from a depth of 16m below the surface of a lake, What is the volume of the bubble when it reaches just below the surface of the lake
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