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Suppose some children push a merry-go-round so that it turns twice as fast as it did before they pushed it. What are the relative changes in angular momentum and rotational kinetic energy?
A slingshot consists of a rubber strap attached to a y-shaped frame, with a small pouch at the center of the strap to hold a rock or other small projectile. FIND the potential energy of the system prior to release
An electron in an atom has an orbital angular momentum with ml = 0. What is the component morb,z? (J*s) What is the component ?orb,z? (J/T) If an atom is in an external magnetic field B of magnitude 45 mT and directed along the z-axis, what is the..
A driver in a car travelling at the speed of 78 km/h sees a cat km away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 99 m.
Water is moving at a speed of 7.55 m/s through a fire hose with an internal diameter of 5.99 cm. What is the gauge pressure of water in the hose
Two loud speakers face each other, vibrate in phase, and produceidentical 451 Hz tones. A listening walks from one speakertoward the other at a constant speed and hears the loudness change(loud-soft-loud) at a frenquency of 2.84 Hz.
To prevent damage to floors (and to increase friction), by what factor does the tip reduce the pressure exerted by the crutch
The inlet of the pipe shown has a cross sectional area of 202.0cm2, and the outlet has a cross sectional area of 75.0cm2. What is the volumetric flow rate in the horizontal pipeline
A nail gun fires a nail into a piece of wood. The nail is going a velocity of 9.0 m/s right before entering the wood. The mass of the nail is 0.060 kg, how far into the wood does the nail go
A child slides across a floor in a pair of rubber-soled shoes. The friction force acting on each foot is 20 N, what is the horizontal distance traveled by the sheared face of the sole
The equation in part (b) can not be solved analytically to give the allowed energy levels but simple solutions exist in certain special cases. Determine the conditions on Vo and a so that a bound state exists with E=0.
compute the accelerations experienced by the blood.
A roller coaster at the Six Flags Great America amusement park in Gurnee, Illinois, incorporates some clever design technology and some basic physics. What is the radius of the arc of the teardrop at the top
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