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A weather vane initially at rest has a moment of inertia of 0.122 kg · m2 about its axis of rotation. A 61.5 g piece of clay is thrown at the vane and sticks to it at a point 13.5 cm from the axis. The initial velocity of the clay is 28.0 m/s, directed perpendicular to the vane. Find the angular velocity of the weather vane just after it is struck.
A simple pendulum is made from a 0.60-m-long string and a small ball attached to its free end. how much time elapses before it attains its greatest speed
Evangelista Torricelli was the first to put forward the idea that we live at the bottom of an ocean of air. (i) Given the value of the atmospheric pressure at the surface of the Earth.
question1take two indistinguishable metallic tumblers a and b. insulate one tumbler say a by wrapping chart paper
A research submarine has a 10-cm-diameter window that is 8.7cm thick. What is the submarine's maximum safe depth in salt water
A bicycle wheel of radius 0.30m is spinning at a rate of 60 revolutions per minuit. What is the period of the wheels motion
A cubic crystal with interatomic spacing of 0.24 nm is used to select gamma rays of energy 100 keV from a radioactive source containing a continuum of energies. at what angle do the 100 keV gamma rays appear
Calculate the force required to pull a copper ball of radius 3.00 cm upward through a fluid at the constant speed 6.00 cm/s
A lead ball is dropped into a lake from the diving board 30 m above the water. After entering the water, it sinks to the bottom with the constant velocity equal to velocity with which it hit the water. The ball reaches the bottom 10 s after it is ..
Determine the smallest thickness of the shaft if the allowable shear stress is ?allow=150MPa and the shaft is restricted not to twist more than 0.08rad
1. Chameleons use their tongues to catch their prey. Their tongues typically accelerate at 250 m/s2 for up to 20 ms, then they travel at constant speed for a further 30 ms. During this total duration, of acceleration plus constant motion, of 5..
A steel wire having a mass of 6.30 g and a length of 1.10 m is fixed at both ends and has a tension of 996 N. Find the speed of transverse waves on the wire
In a lightning bolt, a large amount of charge flows during a time of 2.1 x 10-3 s. How much charged has flowed during the lightning bolt?
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