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A circular platform of radius Rp = 5.95 m and mass Mp = 359 kg rotates on frictionless air bearings about its vertical axis at 6.99 rpm. An 80.1-kg man standing at the very center of the platform starts walking (at t = 0) radially outward at a speed of 0.737 m/s with respect to the platform. Approximating the man by a vertical cylinder of radius Rm = 0.241 m, determine an equation (specific expression) for the angular velocity of the platform as a function of time. What is the angular velocity when the man reaches the edge of the platform?
Electrons are accelerated through a potential difference of 39.0 V. The beam of electrons then passes through a single slit. estimate the width of the slit
As we've seen, astronauts measure their mass by measuring the period of oscillation when sitting in a chair connected to a spring. What is the mass of an astronaut who oscillates with a period of 2.25 when sitting in the chair
A bead with a mass of 0.02 g and a charge of 20nC is free to slide on a vertical rod. At base of the rod is a fixed 20nC charge.
An iron rod of diameter 2.6 cm and length 80.0 cm is to be inserted inside a long solenoid to make an electromagnet. how many turns of wire will be needed for the solenoid
A drag racer crosses the finish line of a 304.8 m track with a final speed of 126 m/s. how long would it take to finish the race
The springs of a 1300 {rm kg} car compress 6.0 {rm mm} when its 62 {rm kg} driver gets into the driver's seat. If the car goes over a bump, what would be the frequency of vibrations.
The intensity level of 26.82 harmonicas in a harmonica band is 87.59 dB. Compute the intensity level generated by one harmonica
A 0.20 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. Determine the speed of the stone
A heat pump keeps a house warm at 72.0 degrees Fahrenheit when the outside temperature is 0 degrees Fahrenheit. How much heat is drawn in from the outside
A uniform steel beam has a mass of 720kg On it is resting half of an identical beam, What is the vertical support force at each end
A 300g ball on a 70-cm-long string is swung in a vertical circle about a point 200 cm above the floor. What was the tension in the string an instant before it broke
q1. a 52 kg person escapes from a burning building by jumping from a window 50 m above a catching net. assuming that
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