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A small sphere , with a radius r = 1.52cm and a mass m = 13.8g rolls without slipping on the inside of a large fixed hemispherical bowel of radius R = 18.6cm and a vertical axis of symmetry. The small sphere starts at the top from rest . What normal force does it exert on the hemisphere at the bottom? Hint: first express its kinetic energy at the bottom in terms of its linear velocity there.
An electron is accelerated by a 4.5 kV potential difference. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5 cm.
Dolphins and other sea creatures can leap to great heights by swimming straight up and exiting the water at a high speed. How much time does it take for the dolphin to come to rest
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1360 Hz. The bird-watcher, however, hears a frequency of 1430 Hz. What is the speed of the bird, expressed as a percentage of the speed of sound?
A transformer has a primary coil with 1200 turns and a secondary coil with 225.0 turns. what is the voltage output from the secondary coil
with an initial concentration of 25 ppm and an equilibrium concentration of 300 ppm if the time constant for the room
In a ballistics test, a 23-g bullet travelling horizontally at 1300 m/s goes through a 40.0 cm-thick 450-kg stationary target and emerges with a speed of 900m/s. The target is free to slide on a smooth horizontal surface.
A 50-kg pole vaulter running at 14 m/s vaults over the bar. Her speed when she is above the bar is 1.7 m/s. determine her altitude as she crosses the bar
The figure below shows a 6.2 kg rod of 1.00 m in length, hinged to a vertical wall and supported by a thin wire. The wire and rod each make angles of 45° with the vertical. When a 10.0 kg block is suspended from the midpoint of the rod, the tension T..
A silver wire has resistivity ? = 1.88 × 10-8 ?·m and a cross-sectional area of 5.80 mm2. What is the displacement current in the wire at that time
A train is travelling up a 4.0 incline at the speed of 3.25 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily.
question1as at rest two trains has sirens that release a frequency of 300 hz. the trains travel toward one another and
two parallel mirrors are a distance d apart. An object is placed 1.0 inch in front of the right-hand mirror. Calculate the distance between the mirrors
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