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Two metal spheres of different sizes are charged such that the electric potential is the same at the surface of each. Sphere A has a radius 7 times that of sphere B. Let and be the charges on the two spheres, and let and be the electric-field magnitudes at the surfaces of the two spheres.
A fan is running at 898 rpm when the power goes out. It makes 1,311 complete revolutions before it finally stops. What was the angular acceleration
Your forehead can withstand a force of about 6.0kN before fracturing while your cheekbone can only withstand about 1.3 kN. what is the magnitude of the balls deceleration
A car of mass 1540 kg rests on a hydraulic lift with a piston of radius 0.27 m that is connected to a second piston of radius 0.031 m. what is the force at the second piston
A penny of mass 3.1g rests on a small 20g block supported by a spinning disk. The coefficients of friction between the block and disk are 0.75 (static) and 0.64 (kinetic).
If a person radiates about 66 W of power at room temperature, how long does it take for person to radiate away the energy acquired by consuming a 230 Calorie doughnut.
A 0.280 kg ball is dropped from rest at a point 1.35m above the floor. The ball rebounds straight upward to a height of 0.780 m. What are the magnitude and direction of impulse of the net force applied to the ball during the collision with the flo..
A 75-kg man is riding in a 75-kg cart at 1.0 m/s. He jumps off in such a way as to land on the ground with no horizontal velocity
A sample of neon gas has its volume tripled and its temperature held constant. What will be the new pressure relative to the initial pressure
In a particular beta-minus decay of a free neutron (that is, one not part of an atomic nucleus), the emitted electron has exactly the same kinetic energy as the emitted electron antineutrino. What is the value, in MeV, of that kinetic energy? Assume ..
A block is launched with initial speed 2.1 up a 30 degree frictionless ramp. How far up the ramp does it slide
An electric fan is turned off, and its angular velocity decreases uniformly from 500 rev/min to 200 rev/min in a time interval of length 4.00 s. Find the number of revolutions made by the motor in the time interval of length 4.00s
A step-up transformer for long-range transmission of electric power is used to create a potential difference of 1.0921 x 10^5 V across the secondary. How many turns are in the primary
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