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Q. A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 20 rpm in 8.0 s. Assume the merry-go-round is a uniform disk of radius 2.5 m and has a mass of 1000 kg, and two children (each with a mass of 20 kg) sit opposite each other on the edge. Calculate the torque required to produce the acceleration, neglecting frictional torque.
What force is required at the edge?
Q. Light is an electromagnetic wave and travels at a speed of 3.00 x 10^8 m/s. The human eye is most sensitive to yellow-green light, which has a wavelength of 5.45 x 10^-7m. How you find out the frequency of this light?
What is t he steam-side coefficient
Compute magnitude of the average velocity
An airplane is flying with a velocity of 93.0 m/s at an angle of 22.0^circ above the horizontal. When the plane is a distance 119 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
An ore car of mass 4 000kg rolls downhill on tracks from a mine. At the end of the tracks, 10 m lower in elevation, is a spring with k = 400 000 N/m. How much is spring compressed in stopping the ore car? Ignore friction.
A potter's wheel having a radius 0.55m and a moment of inertia 12kg•m2 is rotating freely at 51 rev/min. The potter can stop the wheel in 7 s by pressing a wet rag against the rim and exerting a radially inward force of 67N. Find out the effectual co..
On an amusement park ride, passengers are seated in the horizontal circle of radius 6.5 m. The seats begin from rest and are uniformly accelerated for 24 seconds to a maximum rotational speed of 1.4 rad/s.
What is EMF in the secondary circuit
How numerous years would it take a thermally insulated one-million-kilogram chuck of granite to undergo a 1000k boost in temperature?
If you had been tasked to remove the water from New Orleans after Hurricane Katrina would you select a radial flow, mixed flow or axial flow pump for this purpose? Explain it briefly.
A 80 kg person sits on a 4 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.3 cm in diameter. Find the pressure in pascals exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.
A 400 kg car sits 2 m to the right of a fulcrum assume car is on a weightless rod, how far to the left of the fulcrum should an effort of 200 N be applied to keep the system in quilibrium.
A rectangular block of ice 9.00 m on each side and 0.7 m thick floats in sea water. The density of the sea water is 1025kg/m3. The density of ice is 919kg/m3. How high does the top of the ice block float above the water level.
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