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A line of positive charge is formed into a semi circle of radius R = 60.0 cm. The charge per unit length along the semicircle is described by the expression λ=λ0 cos θ. The total charge on the semicircle is 12.0 μC. Calculate the total force on a charge of 3.00 μC placed at the center of the curvature.
Two and one-half kg of ice at temperature T' = 0ºC is melted into water at the same temperature by placing it in contact with a reservoir at temperature TR = 20.0ºC. find the change in entropy of the ice that was melted
A cylindrical fishing reel has a moment of inertia of I = 6.59E-4kg*m2 and a radius of 4.11 cm. What is the force of the fish on the line
A Texas cockroach of mass 0.189 kg runs counterclockwise around the rim of a lazy Susan (a circular disk mounted on a vertical axle) that has a radius 10.2 cm, rotational inertia 3.61 x 10-3 kg·m2, and frictionless bearings.
A boy 10.0 m above the ground in a tree throws a ball for his dog, who is standing right below the tree and starts running the instant the ball is thrown. How far from the tree will the dog catch the ball
A coil has a DC resistance of 100 Ω and an impedance of 180 Ω at a frequency of 2 kHz. What is the inducatance of the coil
Johnny Jumper's favorite trick is to step out of his high-rise window and fall 37.0 m into a pool. Find Johnny's de Broglie wavelength at this moment
three charges shown in figure from an equilateral trangle with 4.9 cm long sides what is the electrical potentialat the point indicted with the dot
Two blocks with mass m1=2kg and m2=3kg hang on either side of a pulley. Block m is on an incline at 30 degrees, Find the maximum extension of the spring.
In a women's 100-m race, accelerating uniformly, Laura takes 2.00 s and Healan 3.00 s to attain their maximum speeds, What is the acceleration of each sprinter
A 71.9-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a)accelerating upward with an acceleration of 1.92 m/s2,(b) moving upward at a constant speed, and(c) accelerating downward with an acceleration of..
(from Roger Ordidge, with alterations) The magnetic field can store energy, but it can do 110 work. Therefore, another agency must be responsible for doing the work that puts the energy into the magnetic field.
five resistors are connected to a battery with an emf of 12 V and internal resistance of 1 ohm. calculate the external resistance of the circuit
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