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An electric fan spinning with an angular speed of 16 rad/s has a kinetic energy of 3.9 J. What is the moment of inertia of the fan?
A baseball player stealing second base runs at 7.8 m/s. If he slides the last 3.6 m, slowing to a stop at the base, what's the coefficient of kinetic friction between player and ground
A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity by a factor of 350. When a jet aircraft is taking off.
a 2.7-kg cart is rolling along a frictionless horizontal track towards a 1.4-kg cart that is held initially at rest.
A 4.22 box sits at rest at the bottom of a ramp that is 7.74 long and that is inclined at 40.0 above the horizontal. The coefficient of kinetic friction is 0.40, and the coefficient of static friction is 0.50.
An infant's toy has a 140g wooden animal hanging from a spring. If pulled down gently, the animal oscillates up and down with a period of 0.50s. how far above its equilibrium position will it go
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1040 Hz, What is the speed of the bird, expressed as a percentage of the speed of sound
You are driving along a highway at 25 m/s when you hear the siren of an emergency vehicle traveling in the opposite direction on the other side of the highway. What is the speed of the vehicle
suppose you wish to fabricate a uniform wire fromnbsp2.50nbspg of copper. the wire is to have a resistance of rnbsp
Consider a balloon containing hydrogenmolecules at room temperature (20°C) and atmospheric pressure. what is the number of molecules in the balloon
A lens for a 35-mm camera has a focal length given by f = 67 mm. What is the magnification of the image on the film
Two different simple harmonic oscillators have the same natural frequency (f=9.10 Hz) when they are on the surface of the Earth. Calculate the new frequency of the vertical spring and mass
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water
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