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A hollow, thin-walled sphere of mass 12.0kg and diameter 47.0cm is rotating about an axle through its center. The angle (in radians) through which it turns as a function of time (in seconds) is given by ?(t)=At2+Bt4, where A has numerical value 1.10 and B has numerical value 1.50.
At the time 4.00s , find the angular momentum of the sphere.
At the time 4.00s , find the net torque on the sphere.
The output voltage of an AC generator is given by ?v = (120 V) sin (50?t). The generator is connected across a 25.0-? resistor. Find the power delivered to the resistor
It is proposed that future space stations create an artificial gravity by rotating, What rotation period will provide "normal" gravity
when free from rest from this spot, the particle arrives at B with twice the speed it previously had, or 2vB. Find the potential at B.
The displacement of a particle in meters moving along x axis is given by x=18t+5t^2, calculate instantenaous velocity at t=2 seconds and instantaneous accelration
A viewing window on the side of a large tank at a public aquarium measures 32 in. by 37 in. The average gauge pressure from the water is 6 psi
A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, explain how many meters will the car have moved before it begins to slow down?
A 125 kg satellite experiences a gravitational force by the Earth of 790 N, What is altitude of satellite and What is the radius of the satellite's orbit
A uniform ring with a radius of 2.15 cm and a total charge of 6.37 ?C rotates with a constant angular speed of 3.84 rad/s, What is the magnetic moment of the rotating ring
By how much horizontal force would you need to apply to a 3.0 N plastic calculator to start it moving from rest? How much horizontal force would you need to keep it moving?
Two automobiles of equal mass approach an intersection. One vehicle is travelling with velocity 13 m/s toward the east and the other is travelling north with speed v2i. Neither driver sees the other.
If a metal wire carries a current of 23.0 mA, how long does it take for 12.0×1020 electrons to pass a given cross-sectional area anywhere along the wire? The magnitude of the charge on an electron is 1.6 × 10-19 C.
A bird sitting in a tree is travelling at 40 km/s relative to the faraway Sun. When the bird drops to the ground below, does it still go 40 km/s, or does this speed become zero.
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