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Two conducting spheres of radii r1 and r2 at the same electric potential V are connected to each other by a wire.
a) What is the ratio of their chargesq1 and q2?b) What is the ratio of the magnitudes of electric fields E1 and E2 at their surfaces?
An electron has an initial velocity of (11.0j + 15.0k ) km/s and a constant acceleration of (4.00x10^12 m/s2) in a region in which uniform electric and magnetic fields are present. If = (400 µT)i , find the electric field in ijk notation.
An electrical generating plant operates a boiler at a temperature of 220 C, What is the maximum theoretical efficency of the plant
If the pressure of the 3 cm3 volume is reduced to 2.0 10-11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
The springs of a 1600 kg car compress 5.0 mm when its 70 kg driver gets into the driver's seat, If the car goes over a bump, what will be the frequency of vibrations?
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air, that the patient and platform start from rest, determine the recoil velocity
An aluminum container which has a mass of 0.350 kg holds 0.70 kg of water. The water and container are both at 45.0°C. How much ice is required
A block (m+12 kg) is moving at a speed of 7.0 m/s on a level surface. A force of 25 N is applied in the direction that is moving but it comes to a stop in a distance 625 cm
At one instant, a 19.0-kg sled is moving over a horizontal surface of snow at 5.00 m/s. find the magnitude of the average friction force acting on the sled while it was moving
A cheerleader waves her pom-pom in SHM with an amplitude of 18.8 cm and a frequency of 0.870 hz. Find the maximum magnitude of the velocity
Two charged Ping-Pong balls separated by the distance of 1.62 m exert an electric force of 0.0234N on each other. What will be the force if the objects are brought closer, to a separation of only 31.4 cm.
The Gravitron is an amusement park ride in which riders stand against the inner wall of a large spinning steel cylinder. At some point, What is the maximum rotational speed at which the riders will not slide up the walls of the ride
assume four objects each of mass m are placed at the corners of a square os side length, How much work is needed to separate the planets so that they are infinitely away from each other
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