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A ball of mass m is suspended above the center of the rotating platform on the elastic spring with stiffness k and initial (non-stretched) length l0 as shown. The opposite end of the spring is attached to the vertical pole fixed on axis of the platform. The platform starts to rotate with angular velocity ω. What is the angle α that the spring makes with the vertical? Consider all values of the angular velocity, from ω=0 to ω=inf and find the conditions on ω when the angle α >0 and when α =0.
which mode of heat transfer out of conduction convection and radiation is principally at work in the following
You are given a 23.8 µF capacitor that is connected to a 12.0 V DC power supply. What will be the charge that is stored on this capacitor
Some believe that the positions of the planets at the time of birth influence the newborn. Calculate the gravitational force exerted on the baby by the planet Jupiter (m=1.9*10^27 kg) at its closest approach to the earth
A stream of water sprays like a fountain vertically from asmall hole in a pipe, reaching a height of 2.5 m. what is the gauge water pressure in the pipe
A rocket-powered hockey puck has a thrust of 1.50N and a total mass of 1.40kg. How far does the puck land from the base of the table
An aluminum bar has a length of 2.0 m and transverse dimensions of 3.5 mm and 6.9 mm, What force is required to stretch the bar 1.2 mm
consider an atomic nucleus to be equivalent to a one-dimentional infinite potential well. what is the wavelength of the emitted light
A 1060-kg van, stopped at a traffic light, is hit directly in the rear by a 794-kg car traveling with a velocity of +3.90 m/s. determine the final velocity of the car and the van
a 2.60-g lead bullet at 32.0degc is fired at a speed of 210 ms into a large block of ice at 0degc in which it becomes
The plates of a parallel-plate capacitor are 3.00mm apart, and each carries a charge of magnitude 75.0nC. What is the area of each plate
A circular wheel has a radius R = 0.45 + or - 0.02 m. The wheel is observed to be rotating uniformly with period T = 2.00 +or- 0.05 s. Compute the frequency with which the wheel spins
A basketball player makes a jump shot. The 0.606 kg ball is released at a height of 2.18 m above the floor with a speed of 7.26 m/s. What is the work done on the ball by air resistance, a nonconservative force
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