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A table with smooth horizontal surface is placed in a cabin which moves in a circle of a large radius R (figure 7-E5). A smooth pulley of small radius is fastened to the table. Two masses m and 2m placed on the table are connected through a string going over the pulley Initially the masses are held by a person with the strings" along the outward radius and then the system is released from rest (with respect to the cabin). Find the magnitude of the initial acceleration of the masses as seen from the cabin and the tension in the string.
A parallel plate capacitor of capacitance 4.3 µF has the space among the plates filled with a slab of glass with = 3.6. The capacitor is charged by attaching it to a 1.6-V battery. After the capacitor is disconnected from the battery, the dielectric ..
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 12cm . You take the balloon in an airplane, where the pressure is 0.90 atm. If the temperature is unchanged, what's the balloon's new radius?..
An 8 g of ice cube at %u2013 120 C is put into a thermos flask containing 100 cm3 of tea at 850C. What is the drop in temperature for tea
q1. the coefficient of kinetic friction between a 78kg box and a warehouse floor is 0.21. how much force is necessary
The wheel weighs 70 kg, and is 120 cm in diameter. you mount the wheel by its central axis, What is the angular velocity of the wheel at the end of the fall
Two capacitors are connected in parallel across the terminals of a battery. What is the voltage of the battery
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel as shown in the figure below. The flywheel is a solid disk with a mass of 61.5 kg and a radius R = 0.625..
A 605 N woman climbs a staircase that rises at 47 degrees above the horizontal and is 4.70 m long. Her speed is a constant 40.0 cm/s. How much work has gravity done on her as she climbed the stairs
A tennis ball (m = 0.2 kilogram) is thrown at a brick wall. It is traveling horizontally at 15 meter per second just before hitting the wall and rebounds from the wall at 12 meter per second, Obtain the magnitude of the average force of wall on bal..
A narrow beam of light passes through a plate of glass with thickness 1.34 cm and a refractive index 1.53. The beam enters from air at an angle 29.8o . The goal is to calculate the deviation d of the ray as indicated in the figure.
What is the minimum thickness of coating which should be placed on a lens in order to minimize reflection of 406 nm light? The index of refraction of the coating material is 1.54 and the index of the glass is 1.79.
A solid uniform 3.25 kg cylinder, 65.0 cm in diameter and 12.4 cm long is connected to a 1.5kg weight over two massless frictionless pulleys. How fast is the cylinder turning at this instant
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