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The turntable of a record player has an angular speed of 9.7 rad/s at the instant it is switched off. 4.0 s later, the turntable has an angular speed of 1.1 rad/s. Through how many radians does the turntable rotate from the time it is turned off until it stops? (Assume constant angular acceleration.)
Light is emitted by a sodium sample that is moving toward Earth with speed v. The wavelength of the light is 589 nm in the rest frame of sample. The wavelength measured in the frame of Earth is 537 nm. Find v.
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. What is the net charge of all these electrons
The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. What is the magnitude of the electric field in the membrane
The electric field everywhere on the surface of a thin, spherical shell of radius 0.785 m is of magnitude 850 N/C and points radially toward the center of the sphere. (a) What is the net charge within the sphere's surface? Please show work.
A Carnot heat engine has an efficiency of 0.800.If it operates between a deep lake with a constant temperature of 291.0 K and a hot reservoir, what is the temperature of the hot reservoir
A hot (70 C) lump of metal has a mass of 250 gm and a specific heat of .25 cal/gm-C. John drops the metal into a 500 gm calorimeter (specific heat of .10 cal/gm-C) containing 75 g of water at 20 C. Once they reach equilibrium, what will be the fin..
A spring with spring constant 19 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 2.5 and released. The ball makes 33 oscillations in 15 seconds. What is its utmost speed.
q1. a screen is placed 51.0 cm from a single slit that is illuminated with light of wavelength 677 nm. if the distance
q1. at the point of fission a nucleus with 98 protons is divided into two smaller spheres each with 49 protons and a
A tennis player standing 10.2 m from the net hits the ball at 3.60° above the horizontal. To clear the net, the ball must rise at least 0.322 m. how fast was the ball moving when it left the racquet
A 10-cm-long nichrome wire is connected across the terminals of a 1.5 V battery. What is the current density inside the wire
Determine the minimum thickness of a soap film (n= 1.80) that will result in constructive interference of a specific red line with wavelength 610 nm
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