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Four identical charges (+4.0 µCeach) are brought from infinity and fixed to a straight line. Thecharges are located 0.20 m apart. Determine the electric potential energy of this group.
A 10cm -diameter cylinder contains argon gas at 10 atm pressure and a temperature of 60?C . A piston can slide in and out of the cylinder. What is the final length of the cylinder
A block of mass m = 0.828 kg is fastened to an unstrained horizontal spring whose spring constant is k = 91.3 N/m. Find the angular frequency of the resulting oscillatory motion
A thin, flexible metal plate attached at one end to the platform, can be used to measure mass. When the free end of the plate is pulled down and released, it vibrates in simple harmonic motion with a period that depends on the mass attached to the pl..
Steam locomotives have an eff of 17% and operate with hot steam temp of 425C. A.) what is the cold temp B.) what is the max eff if the cold temp 150C
A refrigerator uses an ideal Carnot cycle to cool its interior. The outside air has a temperature of 304 K, What is the coefficient of performance of this refrigerator
A box starts out at the top of a frictionless ramp, then slides down. The ramp has a height h = 3 meters and a slope of 5 degrees with respect to the ground. What does this make the velocity of the box at the bottom
In an amusement park water slide, people slide down an essentially frictionless tube. They drop 2.8 m and exit the slide, moving horizontally, What horizontal distance do they travel from the exit point
A hot (70 C) lump of metal has a mass of 250 gm and a specific heat of .25 cal/gm-C. John drops the metal into a 500 gm calorimeter (specific heat of .10 cal/gm-C) containing 75 g of water at 20 C. Once they reach equilibrium, what will be the fin..
imagine that we have a string 1.5 meters long that is fixed at both ends. what is the frequency of the normal mode of the strings oscillation that has 3 antinodes
A factory worker pushes a 30.0kg crate a distance of 4.4 m along a level floor at constant velocity by pushing downward at an angle of 31 below the horizontal. What is the total work done on the crate
A 57 kg tightrope walker stands in the middle of a rope. Her weight makes the rope sag, evaluate the rope tension
When the plane atats to accelerate for take off, a man is holding the pocket watch steady by its 20cm chain, Estimate the takeoff velocity of the plane
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