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A turn-table is spinning down due to friction in the bearings. It takes 60 seconds for the turn-table to stop from an initial speed of 2. 5 s?1 and that the magnitude of the initial angular acceleration was 0.10s?2. Assuming a quadratic fit for the angular velocity, find the expression for this angular velocity in this time interval. From the angular velocity, find the angular acceleration and the number of rotations of the turn-table in this time interval.
q1. a ball tied to the end of the string is swung in a vertical arc of radius r under the action of gravity. what would
An electron is accelerated from rest by a potential difference of 440 V. It then enters a uniform magnetic field of magnitude 220 mT with its velocity perpendicular to the field. Calculate the radius of its path in the magnetic field
Unpolarized white light is incident on a polarizer and then falls on an analyzer whose TA (Transmission Axis) makes an angle of ?= 23.5? with the polarizer. What is the fraction of the original light transmitted through both the polarizer and analy..
Mary is driving her car at 48 km/h. She approaches an intersection just as the traffic light turns yellow. The yellow light lasts only 3.0 s before turning to red, and she is 30 m away from the near side of the intersection.
Write a Matlab program that converts from COEs (classical orbital elements) to position and velocity vectors
A 16 cm-diameter compressed-air tank is 70cm tall. The pressure at 30 degrees C is 130 atm. What is the number of moles in the tank
A crate of mass 12.5 kg is pulled up a rough incline with an initial speed of 1.50 m/s. The pulling force is 100 N parallel to the incline, How much mechanical energy is lost due to friction
A 1.00 kg object is attached to a horizontal spring. The spring is initially stretched by 0.500 m, and the object is released from rest there. What is the maximum speed of the object
An electron ( mass = 9.11×10?31kg ) leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, If the accelerating force is constant, compute the acceleration of the electron
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 15.0° below the horizontal. Find the length of time the car is in the air
two 8.00 kg blocks are connected by a massless string over a frictionless pulley of radius 10.0 cm and rotational inertia, I. What is the inertia of the pulley
Nitrogen and oxygen in their liquid states have densities only 0.80 and 0.90 that of water. Atmospheric pressure is due primarily to weight of nitrogen and oxygen gas in the air. If atmosphere liquefied would its depth be greater or less than 10.30 m..
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