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A metal cylinder, which has length L and a resistance of 4 Ohms, is melted down to form a new cylinder with twice the length but the same density and mass. What is the new cylinder's resistance in Ohms ?
Electrons are ejected from a metallic surface with speeds ranging up to 4.60 × 105 m/s when light with a wavelength of 625 nm is used. What is the cutoff frequency for this surface
copper has a work function of 4.7ev while gold has a work function of 5.1ev. what are the minimum frequencies of light
A skier, weighing 453 n, is skiing down a slope that has an incline of 29 degrees above the horizontal. Compute the acceleration of the skier (coefficient of kinetic friction between the skis and snow is 0.21)
What is the least radius of the circular path? (b) At this radius, what is the force causing the centripetal acceleration of the pilot.
The football started on the ground 63yrds from the base of the goal posts and just barely cleared the 10ft high bar. How long after the ball was struck did it past through the goal posts
A 13.6 kg object on a horizontal frictionless surface is attached to a spring with k = 519 N/m. find the initial potential energy of the block-spring system
A 61 kg skater and a 77 kg skater stand at rest on frictionless ice. They push off, and the 61 kg skater moves at 1.9 m/s in the + x-direction. What's the other's velocity? (Express your answer to two significant figures and include the appropriate u..
a pair of parallel plates is charged by a 12-v battery. if the electric field between the plates is 1200 n/c, how far apart are the plates
My home is exactly 5.9 km from Spartan Stadium, where the football team has just scored another touchdown. What is the temperature(in degree Celsius) of the air
q1. a 62.6-kg chandelier is suspended 1.5 m below a ceiling by three wires each of which has the same tension and the
A child sits on the edge of a spinning merry-go-round that has a radius of 2.9 m. What is the child's acceleration
A 10.3 kg block is dragged over a rough, horizontal surface by a 63.6 N force acting at 21° above the horizontal. Find the total change in the block's kinetic energy
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