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Three resistors, 20, 40, and 72 Ω, areconnected in series, and a 0.53-A currentpasses through them.
a) What is the equivalent resistance?b) What is the potential difference across the three resistors?
Write down the expression for net torque
A physics professor demonstrates the Doppler effect by tying a 580HZ sound generator to a 1.0m--long rope and whirling it around her head in a horizontal circle at 120rpm . What is the highest frequency heard by a student in the classroom? What is th..
Two hockey players strike a puck of mass 0.169 kg with their sticks simultaneously, exerting forces of 1.17 103 N, compute the instantaneous acceleration of the puck
A 10000 kg empty railroad car moving at 3 m/s collides with a loaded railroad car weighing 196000 N and couples with it. What is the final velocity of the combined railroad cars
Suppose 2.50 kg of 32 degrees C water is mixed with 9.30 kg of 65 degrees C water. If no heat is lost in this system, what is the final temperature of the water
A golfer hits a golf ball with a velocity of 138 mph. Determine the head velocity of the golf club. Assume the following: • Mass of golf club head (M): 190 g • Mass of golf ball (m): 46 g • Coefficient of restitution (e): 0.83
A hole in an iron plate has a radius of 2.300 cm at STP. When the plate is heated to 100 C, what is the hole diameter
Two carts with masses of 4.80 kg and 2.78 kg move toward each other on a frictionless track with speeds of 4.94m/s and 3.17m/s respectively. The carts stick together after colliding head-on. Find out the final speed.
What was the initial negative charge on one of the spheres, and what was the initial positive charge on the other?(Hint: Use charge conservation and solve for one of the initial charges. You will end up with a quadratic equation. The solutions giv..
A turntable with a moment of inertia of 4.8 kg · m2 rotates freely with an angular speed of 33 1/3 rpm. Calculate the angular speed of the turntable
As a baseball is being caught, its speed goes from 36 to 0 m/s in about 0.009 s. Its mass is 0.145 kg. What is the size of the force acting on it
A proton orbits a long, uniformly charged wire, making 1.6×10^6 revolutions per second. The radius of the orbit is 1.8 cm. What is the wire's linear charge density
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