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A 10kg baby is perched at the rim of a 40kg disk. The disk rotates freely in a horizontal plane at 1 rev/s. The baby crawls to point at the center of the disk. What is the frequency of rotation in rev/s when the baby arrives at the center (Assume the size of the baby and the frictional torques are negligibly small)?
A large capacitance of 1.80 mF is needed for a certain application, Calculate the volume of Teflon alone in the capacitor
Sound with a frequency of 466 Hz travels through steel. What is the speed of the sound in steel?
A 1.9x10^14 Hz electromagnetic wave propagates in carbon tetrachloride with a speed of 2.05x10^8 m/s
A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 16rpm in 10.0s. What force is required at the edge
As part of a safety investigation, two 1400 cars travelling at 18 are crashed into different barriers. Find out the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 to stop, and (b) car that hits a concrete barrier an..
Only about 5 % of the energy in the universe is composed of baryonic matter. Estimate the density of dark matter in the universe
A speedboat moving at 33.0 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of ?3.20 m/s2 by reducing the throttle. (a) How long does it take the boat to reach the buoy? (b)What is the velocit..
A car of mass m moving at speed v1 collides and couples with the back of a truck of mass 2 m moving initially in the similar direction as the car at a lower speed v2.
What is the apparent weight of a 75 kg astronaut.
A 1290-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1805-N crate hangs from the far end of the beam. find the magnitude of the tension in the wire
a block of mass M hangs at rest. The rope that is fastened to the wall is horizontal and has a tension off 52 N. what is the angle theta
An 800 keV photon is Compton scattered at an angle of 30 degrees. Calculate The energy of the scattered photon, The change in wavelength
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