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Two 4.0 cm × 4.0 cm electrodes spaced 2.0 mm apart form aparallel-plate capacitor. Inside the capacitor the electric fieldstrength is 6.2 X106 N/C. What is the charge on each electrode?
two circular coils are concentric and lie in the same plane. the inner coil contains 170 turns of wire has a radius of
During a violent storm, a car is struck by a failing high-voltage wire that puts an excess charge of -850 mircoC on the metal car. how much is on the outer surface of the car
A small motor is mounted on the axis of a space probe with its rotor (the rotating part of the motor) parallel to the axis of the probe. Through how many revolutions has the rotor turned
Two resistors, R1=100 ohms and R2=200 ohms,are connected in parallel across a battery. The current throughR1 is 0.150 amperes. What is the terminal voltage provided by the battery, and what is the total current through the battery?
The closest star to our solar system is Alpha Centauri, which is4.30 light years away. A spaceship with a constant speed of 0.800c relative to the Earthtravels toward the star. How much time would elapse on a clock on board the spaceship?
Consider a generator with a 300 turn coil on its armature and a uniform magnetic field of 5.4 T. The diameter of the coil is 5.0 cm. how fast do we need to rotate the coil
two objects push on each other. the first object has a mass 30kg and it accelerates at 2m/s2 toward the east. what is the force acting on the first object
A beam of ultraviolet radiation, with frequency of2.78x1015 Hz is directed on a clean metalsurface. Calculate the maximum kinetic energy for an electron
A block of unknown mass is attached to a spring of spring constant 6.5 N/m and undergoes simple harmonic motion with an amplitude of 10 cm. Calculate the maximum acceleration of the block
A beam of light traveling in a block of glass (n=1.60) is incident on the top surface at an angle of 55° with respect to the normal. What is the maximum possible index of refraction of the oil
A stone has a mass of 3.15 g and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.941. determine the radius r of the tire
a surveyor wishes to find the distance between 2 inaccessible points p and q on opposite sides of a lake. from point r
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