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The student sits on a pivoted stool while holding a weight ineach outstretched hand. The stool rotates about a verticalaxis through its center. The moment of intertia of thestudent, weights, and stool is 2.2.5 kg-m2 , and theinitial angular speed is 5.0 rads/s. As the student rotateson the stool, the weights are pulled inward so that the new momentof inertia becomes 1.80 kg-m2. Calculate the new angular speed of the system.
An 8.71-kg block slides with an initial speed of 1.62 m/s down a ramp inclined at an angle of 27.0° with the horizontal. find the distance the block slides before coming to rest
Three equal point charges, each with charge 1.65 , are placed at the vertices of an equilateral triangle whose sides are of length 0.500 . What is the electric potential energy of the system
A certain lens focuses light from an object 1.25maway as an image 41.8cm on the other side of the lens. What type of lens is it
X-rays with a wavelength of 7.02 x 10^-12 m strike a stationary electron and the reflected photon is scattered 75 degrees relative to the incident photon. What is the wavelength of the scattered photon?
A railroad car of mass 2.00 x 10^4 kg moving at 3.00 m/s collides, What is the speed of the three coupled cars after the collision
An object is moving in a circular path of radius 4.00 m. If the object moves through an angle of 30.0 degrees, then what is the tangential distance traveled by the object
Assume the mostly infrared radiation from a heat lamp acts like a continuous wave with wavelength 1.50 µm. Find the peak magnetic field strength
Photons with wavelength 670 nm are capable of producing photoelectrons from a particular substance. Determine the substance's work function and cutoff wavelength
A cart for hauling ore out of a gold mine has a mass of 447 kg, including its load. Calculate the work done on the cart during the process by friction
Two straight wires run parallel to each other, each carrying a current in the direction shown below. The two wires experience a force in which direction? B) What happens when one of the currents is turned off?
Suppose you could pack neutrons (mass = 1.67 × 10-27 kg) inside a small ball of radius 0.026 m in the same way as neutrons, Approximately how many neutrons would fit inside the ball
A Mercedes-Benz 300SL (m = 1750 kg) is parked on a road that rises 10° above the horizontal, What is the static frictional force that the ground exerts on the tires
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