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A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 3.7 kg · m2. A second student tosses a 1.8-kg mass with a speed of 2.9 m/s to the student on the stool, who catches it at a distance of 0.33 m from the axis of rotation. What is the resulting angular speed of the student and the stool?
rad/s
As a woman walks, her entire weight is momentarily placed on one heel of her high-heeled shoes. Calculate the pressure exerted on the floor by the heel
What must the charge (sign and magnitude) of a particle of mass 1.44g be for it to remain stationary when placed in a downward directed electric field of magnitude 660 N/C.
Consider a common mirage formed by super-heated air just above a roadway. A truck driver whose eyes are 2.00 m above the road, Find the index of refraction of the air just above the road surface
One mole of an ideal gas does 1408 J of work on the surroundings as it expands isother- mally to a final pressure of 1.6 atm and vol- ume of 29L. Find out the initial volume.
An air molecule is moving at a velocity of 444 m/s. How various meters would the molecule move during 7.00 ms (milliseconds) if it didn't collide with any other molecules.
A high-voltage transmission line with a resistance of 0.30 /km carries a current of 1050 A, What is the power loss due to resistance in the line
A 5kg steel ball strikes a wall with a speed of 8m/s at an angle of 60.0° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ..
One fine spring afternoon, you go outside to play a rousing game of hoop-and-stick. If your hoop rolls without slipping, what is the angular speed of the hoop
What is the focal length of this mirror. If the object is 25 cm in front of the mirror, what is the image distance.
What is the magnitude of the average force on Superman's chest from the stream of bullets.
You are at a rock concert, and the sound intensity reaches levels as high as 100 dB. Calculate the amplitude of this oscillating force
Two objects of the same mass, m = 1.00 kg, are projected towards each other. The first object initially has velocity (20.0m/s)i^. What is the change in kinetic energy in the collision
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