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A woman with mass of 55 kg stands at the rim of a horizontal table having a moment of inertia of 410 kg m2 and a radius of 1.6 m. The turntable is initially at rest and is free to rotate about a frictionless, vertical axis through its center. The woman then starts walking around the rim clockwise (as viewed from above the system) at a constant speed of1.1 m/s relative to the Earth. (1st question) With what angular speed does the turntable rotate? Answer in units of rad/s (2nd question) How much work does the woman do ON THE TABLE to set it into motion?
Answer in units of J
An insulating rod of length 8.0-cm and charge 30 nC is in a plane with a long straight uniform line charge. What is the electric force on the rod
question1when two tuning forks are struck simultaneously 9 pulses of increased sound intensity per second are heard.
A single-turn current loop, carrying a current of 4.82 A, is in the shape of a right triangle with sides 72.8, 121, and 141 cm. The loop is in a uniform magnetic field of magnitude 57.9 mT whose direction is parallel to the current in the 141 cm side..
A disk rotates about its central axis starting from rest at t = 0 and accelerates with constant angular acceleration. what is the time required to complete 64 revolutions
A projectile proton with a speed of 500 m/s collides elastically with a target proton initially at rest. What is the speed of the target proton after the collision
The mass of the Earth is 5.98 ? 1024 kg, and the mass of the Moon is 7.36 ? 1022 kg. Locate the center of mass of the Earth-Moon system as measured from the center of the Earth
A student has built a 20-cm-long pinhole camera for a science fair project. She wants to photograph the Washington Monument, How far should she stand from the Washington Monument
A frictionless plane is 10.0 m long and inclined at 34.0°. A sled starts at the bottom with an initial speed of 5.90 m/s up the incline. find the distance that the first sled traveled up the incline
Spaceship A moves away from earth at a velocity of uxA= -0.50 c and spaceship B at uxA= 0.70c, uyB= -0.20c uzB=0.30c. How fast is B's velocity in A's reference frame
The engine of an aircraft propeller delivers an amount of power 171hp to the propeller at a rotational velocity of 2360 rev/min the torque= 516 Nm, How much work does the engine do in one revolution
The focal length of a bi-convex lens is 10 cm. The focal length of a convex-concave thin lens is -20 cm. If placing them in parallel and in close contact, what is the compound focal length
An outfielder throws a 0.150 kg baseball at a speed of 36.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball at the highest point of its motion
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