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Suppose a conducting sphere of radius 40 cm has a charge of 7 mC and a mass of 2 kg. What is the electric potential at the center of the sphere? Assume that the electric potential is zero at infinity.
Two large flat planes are separated by a distance d. the plates are connected to a battery. Write an expression for the capacitance
How large does the radius R of the dish have to be to attain electric field vector amplitude of 0.1mV/m at the receiver.
What is the maximum speed with which a 1200 kg car can round a turn of radius 60.0m on a flat road if the coefficient of friction between tires and road is 0.65.
A coin placed on a turntable rotating at 37.9 rev/min will stay there if its center is placed no further than 8.5 cm from the axis of rotation. find the coefficient of friction between the coin and turntable
An ?-particle has a charge of +2e and a mass of 6.64 ? 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.06 X 106 V, What is the speed of the ?-particle
A cylinder of gas at room temperature (20°C) has a pressure p1. To what temperature in degrees Celsius would the temperature have to be increased for pressure to be 2.7p1.
you accelerate your car starting from rest. while the car is increasing its speed, the frictional force acting from the road on the tires? A) directed backword, opposing the motion B)IS directed vertically uo, C) is directed forward, in the direct..
A sphere of mass 10.0 kg and radius 0.45 m is subject to an angular acceleration about its center of 2.00 rad/s2. What are the final respective rotational kinetic energies, assuming both the objects began at rest
A projectile is fired directly upward at such an initial velocity that it reaches half its height of 45 meters. Determine the speed of the projectile at the top of the trajectory
Two boats are heading away from shore. Boat 1 heads due north at a speed of 2.94 m/s relative to the shore. find the speed of the passenger relative to the shore
Two boats start together and race across a 56km wide lake and back. Boat A goes across at 56 km/h and returns at 56km/h. Boat B goes across at 28km/h, and its crew, realize how far behind it is getting.
A recording engineer works in a soundproofed room that is 39.4 dB quieter than the outside. what is the intensity outside
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