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A solid copper sphere has a net positive charge. The charge is distributed uniformly over the surface of the sphere, and the electric ?eld inside the sphere is zero. Then a negative point charge outside the sphere is brought close to the surface of the sphere. Is all the net charge in the sphere still on its surface? If so, is this charge still distributed uniformly over the surface? If it is not uniform, how is it distributed? Is the electric field inside the sphere still zero ? In each case justify your answers.
An engine draws energy from a hot reservoir with a temperature of 1250 K and exhausts energy into a cold reservoir with a temperature of 355 K. What is the power output of this engine
a playground merry go round has a radius of 4.40 m and a moment of inertia of 245kg.m^2 and turns with negligible friction about a vertical axle through is center. What is the average power supplied by the child
A body moves with shm and passes two points A and B 56cmapartwith the same velocity,having occupied 2s in passing from A toB. Find the period and amplitude of the oscillation
90 kW of power is delivered to the other side of a city by apair of power lines with the voltage difference of 13952.8 V. How much power is waisted as heat in both lines together
question a baseball played of mass 93.2 kg is sliding horizontally into 2nd base retarded by a force of 575.4 n. what
using momentum newtons first law of motion and or newtons second law of motion explain how a rocket is launched deep
A rifle bullet with mass 8.00 g strikes and embeds itself in ablock with mass 0.992 kg that rests on a frictionless, What was the initial speed of the bullet
An aluminum rod is 24.0 cm long at 20°C and has a mass of 350 g. If 13,500 J of energy is added to the rod by heat, what is the change in length of the rod
a pendulum of length 50 cm is pulled 30 cm away from thevertical axis and released from rest. What will be its speed at the bottom of its swing
A spring with spring constant 14 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 3.0 and released. The ball makes 17 oscillations in 16 seconds. What is it the mass of ball.
A particular radioactive source produces 125 mrad of 1 MeVgamma rays per hour at a distance of 1.0 m. How long could a person stand at thisdistance before accumulating an intolerable dose of 1 rem
A sonic depth gauge is placed 5m above the ground. Anultrasound pulse sent downward reflects off snow depth depends onthe device using the correct air temperature is 0C. How far is the surface of the snow from the device
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