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The frictional force between the block and the table is 20 N. If the moment of inertia of the wheel is 4.0kgm2 , find how long it will take the block to drop 60cm after the system is released.
An 8.5 gram ice cube at -10°C is put into a Thermos flask containing 200 cm3 of water at 30°C. Find by how much has the entropy of the cube-water system changed
Two tiny conducting spheres are identical and carry charges of -29.4C and +70.0C. What is the magnitude of the force that each sphere experiences
A canoe has a velocity of 0.31m/s southeast relative to the earth. The canoe is on a river that is flowing 0.47m/s east relative to the earth. Find the magnitude of the velocity of the canoe
A hockey puck has a mass of 0.113 kg and is at rest. A hockey player makes a shot, exerting a constant force of 28.0 N on the puck for 0.16 s. With what speed does it head toward the goal
q1. a 35.0-g bullet moving at 475 ms strikes a 3.2-kg bag of flour that is on ice at rest. the bullet passes through
a 400 kg mass is released at rest from a distance of two earth radii above the surface of the earth. find the speed of
A diffraction grating has 3996 lines/cm. Light that contains all wavelengths between 464 and 638 nm shines on the grating. Calculate the width of the dark area
Positronium is a hydrogen atom with the proton replaced by a positron (like electron, but w/ positive charge). Calculate E1 for positronium.
For a certain block on a spring, the block's displacementx = X sin() and its velocity v = X cos(), with X = 0.57 m. If the block has a mass of 0.19kg and the spring constant is 55 N/m, calculate the total energywhen = 44°.
A magnetic field points perpendicular into a 5x12 cm rectangular coil of 44 turns and resistance .25 omega. what magnitude of emf is being induced in the coil
The maximum speed and acceleration of a simple harmonic oscillator are 0.96 m/s and 1.58 m/s. Find the oscillation amplitude. Express your answer with the appropriate units.
A dolphin in an aquatic performance jumps straight up out of the water at a velocity of 11 m/s. How high does his body rise above the water in meters
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