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The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 4.0 rev/s in 13.0 s. At this point, the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub slows to rest in 12.0 s. Through how many revolutions does the tub turn during this 25 s interval? Assume constant angular acceleration while it is starting and stopping.
An inductor is connected to a source of sinusoidally varying voltage with constant amplitude and a frequency of 50.0 Hz. what will be the new rms current
The range of a projectile depends not only on v0 and ?0 but also on the value g of the free-fall acceleration, which varies from place to place. by how much would his record have differed
A small block with mass 0.0450kg slides in a vertical circle of radius 0.600m on the inside of a circular track. How much work was done on the block by friction during the motion of the block from point A to point B
A tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 55.5 m/s and returns the shot with the ball traveling horizontally at 36.0 m/s in the opposite direction. find the impulse delivered to the ball by the tennis racq..
A demonstration gyroscope consists of a uniform disk with a 41-cm radius, mounted at the midpoint of a light 58-cm axle, How fast is the gyroscope precessing, in units of rad/s, if the disk is spinning around the axle at 28 rev/s
Calculate the eccentricity, e, of a planet's orbit around a central star if the ratio of its gravitational potential energies at the aphelion and at the perihelion is ? = 0.175
At the instant shown, the spring is unstretched and B is moving downward at 4 ft/s. Use conservation of energy to identify velocity of B when it has moved downward 2 ft from its current position.
A cannon ball is shot straight upward with a velocity of 77.50 m/s. What is the maximum height attained by the cannon ball
A 120-V motor has mechanical power output of 2.70 hp. It is 94.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
Sunlight, with an intensity of 657 W/m2, strikes a flat collecting surface perpendicularly and is totally absorbed. find the force in micronewtons that acts on the surface
if two springs are attatched to one another and a mass is added at the bottom, how would one find the potential energy of the springs
Two ideal gases have the same mass density and the same absolute pressure. One of the gases is helium (He), and its temperature is 180 K. The other gas is neon (Ne). Illustrate what is the temperature of the neon?
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