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A thin insulating rod is bent into a semicircle arc of radius a, and a total electric charge Q is distributed uniformly along the rod. Calculate the potential at the center of curvature of the arc if the potential is assumed to be zero at infinity. Express the answer in terms of the given quantities and appropriate contants.
A car starts from rest and travels for 7.0 seconds with auniform acceleration of +2.5 m/s^2. how far has it gone
Two conductors are made of the same material and have the same length l. Conductor A is a hollow tube and inside diameter is 1.5mm and outside diameter is 7.30mm; conductor B is a solid wire with radius Rb, what value of Rb is required for the two co..
A ball of mass 0.40 kg is fired with velocity 180 m/s into the barrel of a spring gun of mass 1.5 kg initially at rest on a frictionless surface. The ball sticks in the barrel at the point of maximum compression of the spring. No energy is lost to fr..
A loudspeaker at a rock concert generates 10-2 W/m2 at 22.0 m at a frequency of 1.0 kHz. Assume that the speaker spreads its energy uniformly in three dimensions. What is the total acoustic power output of the speaker
On a winter day heat leaks out of a house at the rate of 2.5x10^4 kcal/h. At what rate does this process produce entropy
A spring scale on a rotating platform indicates that the horizontal force on a 0.606 kg mass is 1.57 N, How long does it take for the platform to make one revolution
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
a boy is laying on a sled wich is on an ice covered hillinclined at an anlge of 15 degrees if the boy and the sled have acombned mass of 54kg what is the force pulling them down the hill
An object moving with uniform acceleration has a velocity of 10.0 cm/s in the positive x-direction when its x-coordinate is 3.09 cm. If its x-coordinate 3.05 s later is ?5.00 cm, what is its acceleration?
A car travelling in a large circle passes by the motorcycle that is travelling in a straight line from North to South. Both of their speedometers read 10m/s.
A 2.50-cm-diameter parallel-plate capacitor with a spacing of 0.900 mm is charged to 500 V. What is the total energy stored in the electric field
A vessel whose walls are thermally insulated contains 2.10 of water and 0.450 of ice, all at the temperature of 0 . The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted into the water.
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