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The base of a record player is a disk that has a mass of 2 kg and a diameter of 34 cm. A child spins it so it rotates at a constant rate of 50 times a minute. Neglect friction and all that stuff that complicates problems! Then, the child drops on a record (also a disk) with mass 1.3 kg and a diameter of 32 cm. How many times a minute will they spin together if the record player base and the record stick together (assume there is no slipping when the record lands on the base)? Remember, for a solid disk or cylinder, I = 1/2 MR2.
Starting from rest at the ground floor, an elevator takes 19.0 seconds for a vertical trip of 70.0 meters. What is the maximum velocity of the elevator
You stand on a frictional platform that is rotating at 1.9 rev/s. Your arms are outstretched, and you hold a heavy weight in each hand. What is the resulting angular speed of the platform
An insect 5.50mm tall is placed 25.0cm to the left of a thin planoconvex lens. The left surface of this lens is flat, Calculate the size of the image
a 0.30-kg puck initially at rest on a frictionless horizontal surface is struck by a 0.20-kg puck that is initially
how would you describe the discoveries of benjamin franklin robert millikan cgarles-augastin de coulomb and ernest
question a 5 turn loop of wire with a radius of 4cm moves toward a 0.15t magnetic field in a 3 second time interval.
A dipole is formed by point charges +3.8 micro Coulomb and -3.8 micro Coulomb placed on the axis at (0.45 m, 0) and (-0.45m, 0), respectively. At what positions on the axis does the potential have the value 7.7×105 V?
An intially uncharged 4.59-uF capacitor and a 6.63-kOHm resistor are connected in series to a 1.50-V battery that has negligible internal resistance. Calculate the circuit's time constant in milliseconds
a solonoid 4.0 cm in raduis and 4 m in length has 5000 uniformly spaced turns and carries a current of 5.0a. concider a
Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 5.85 m/s. Ignore frictional losses. What is the height of the hill
A 180g block hangs from a spring with spring constant 6.0 N/m. At the block is 31cm below the equilibrium point and moving upward with a speed of 98.0cm/s. What is the block's position at t = 9s.
a person rides on a 12-m-diameter ferris wheel that rotates at the constant rate of 6.6 rpm. calculate the magnitude
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