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A crankshaft with a diameter of 3.0 \rm cm, rotating at 2600 rpm comes to a halt in 1.40 s.What is the tangential acceleration of a point on the surface of the crankshaft?
a 100 w lightbulb generates 94 w of heat which is dissipated through a glass bulb that has a radius of 2.8 cm and is
A U-shaped tube open to the air at both ends contains some mercury with a density of 13,600 kg/m3. Calculate the gauge pressure at the water-mercury interface
You drop a stone into a deep well and hear it hit the bottom 2.60 s later. This is the time it takes for the stone to fall to the bottom of the well.
Two boxes of masses m1 = 20.0 kg and m2=40.0 kg are connected by a rope through a pulley that has a uniform wheel of mass M=10.0 kg
a proton is released from rest in a uniform electric field of magnitude 1.26x105 nc. find the speed of the proton after
A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light originates in the oil and passes into the unknown liquid. What is the index of refraction of the unknown liquid
one container is filled with helium gas and another with argon gas. Both containers are at the same temperature. Which molecules have the higher Rms speed
two tiny conducting spheres are identical and carry charges of -18.7c and 47.5c. they are separated by a distance of
A grinding wheel of radius 0.35 m rotating on a frictionless axle is brought to rest by applying a constant friction force tangential to its rim. The constant torque produced by this force is 75N · m. Find the magnitude of the friction force.
After inverting the tube 100 times, the temperature of the lead shot is found to have increased by 30C
Two 2.0-g pith balls hang in air on essentially weightless cotton threads 50-cm long from a common point of support. Find the magnitude of the charge on each ball
What minimum horsepower must a motor have to be capable to drag a 290 box along a level floor at a speed of 1.05 if the coefficient of friction is 0.50.
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