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If the magnitude of an electric field in air is as great as 3.00×106 N/C, the air becomes ionized and begins to conduct electricity. This phenomenon is called dielectric breakdown. A charge of 13.0 C is to be placed on a conducting sphere. What is the minimum radius of a sphere that can hold this charge without breakdown?
Two small metallic spheres, each of mass m = 0.40 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
A 1.4cm tall object is 4.0cm from a concave mirror. Ifthe image is 4.0cm tall, how far is it from the mirror
A capacitor can be made from two sheets of aluminium foil separated by a sheet of waxed paper. If the sheets of aluminium are 0.37 m by 0.33 m and the waxed paper, of slightly larger dimensions, is of thickness 0.040 mm and dielectric constant? = 2.5..
Additional light oil is poured onto the liquid surface until the top surface of the oil coincides with the top surface of the wood cube (in hydrostatic equilibrium). How thick is the whole layer of the light oil
the pressure att he depth of 1.25 m in a tank of liquid is measured to be 125.5 kpa. the tank is open to the outside
A 230-N child is in a swing that is attached to ropes 1.90m long. Find out the gravitational potential energy associated with child relative to her lowest position at the following times.
A .200 kg plum bob is attached to a string and the string isconnected to the ceiling. How many cycles does it take for the plum bob to lose halfof its energy
A wagon is being pulled up a hill by a running child. Derive the work done by friction on the wagon
an other frame moves with a speed of 0.85 relative to the home frame. an object at rest in the home frame has a length
When a softball player swings a bat, she accelerates it from rest to an angular velocity of 10 rad/s in a time of 0.26792 seconds. What is the magnitude of the torque she applies to the end of the bat? Model the bat as a uniform rod of length 0.90 m ..
A 10.1-kg cannonball is fired from a 3,350 kg cannon with a velocity of 198 m/s. What is the speed of recoil of the cannon
What is the smallest number of whole logs (? = 725 kg/m3, radius = 0.0917 m, length = 3.10 m) that can be used to build a raft that will carry four people
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