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A record (mass 100g and radius 12cm) is rotating at a rate of 33rpm. A quarter (mass 6g) is dropped 2cm from the edge of the record. What is the new rotational rate if angular momentum is conserved? Model the record as a disk and the quarter as a point mass.
A 42-cm-long solenoid, 1.8?cm in diameter, is to produce a 0.030-T magnetic field at its center. If the maximum current is 4.6 A
A ladder weighs 150 N, is 5m long, and is leaning against a frictionless wall at an angle of 30* with the horizontal. Draw an extended freebody diagram of this situation
A force of k is applied to an object for a small fraction of a second, t_k, less than the duration of one frame, t_f. Our simulation doesn't support applying forces for less than an entire frame, so if we wanted to simulate the effect of force k over..
What tension in Newtons should a 50cm length of string support in order to whirl an attached 2000g stone in a circular path at 5 m/s.
A 150 Newton horizontal force pushes a 20 kg mass sitting on a horizontal surface. Additionally, the horizontal surface exerts a 50 Newton frictional force on the mass. find the hydroxide-ion concentration of this solution
Every day our Earth receives 1.55×1022 J energy from the Sun. If we were able to use 1.05 percent of this energy to accelerate spaceships, how many missions would be possible in one year
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, Find the mass of the gold in the rock
A boat moves through the water of a river at 10-m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.6-m/s.
A portable CD player operates with a voltage of 8.00 V, and its power usage is 0.264 W. Find the current in the player
A loudspeaker is generating sound in a room. At a certain point, the sound waves coming directly from the speaker, What is the total intensity level
A 3.50 x 10^2 N child is in a swing that is attached to ropes 1.75 m long. find the gravitational potential energy associated with the child relative to her lowest postion. What is the net charge inside the die.
12 Gallons per minute of water flows through a heater and must be raised from 20 to 90 Celcius. Calulate the rate of heat supplied
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