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A large, cylindrical roll of paper of initial radiusR lies on a long, horizontal surface. The outside end of thepaper is nailed to the surface. The roll is given a verylight push (initial speed close to zero) and commences tounroll. Assume the roll has a uniform density & thatmechanical energy is conserved in the process. What is the speed of the center of mass of the roll when its radius hasdiminished to r?
An electron has an initial velocity of 3.50 106 m/s in the x direction. It enters a uniform electric field = (400 N/C) , which is in the y direction. (a) Find the acceleration of the electron.
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 4.7 kg *m^2. Calculate the final kinetic energy of the system
A car at the Indianapolis 500 accelerates uniformly from the pit area, going from rest to 350km/h in a semicircular arc with a radius of 210m. Determine the tangential and radial acceleration of the car
When 1160 of heat are added to one mole of an ideal monatomic gas, its temperature increases from 272K to 275K
a planet with a radius of 6.00 x 10^7 m has a gravitational field of magnitude 30.0 m/s2 at the surface. what is the escape speed from the planet
Consider a particle of radius s that orbits a solar mass star at 1 au on a circular orbit.Calculate the mass of gas that the particle collides with during one orbit about the star
At t1 = 5.00 s, the acceleration of a particle moving at constant speed in counterclockwise circular motion is a1=(2m/s^2)i + (9m/s^2)j At t2 = 6.00 s (less than one period later), the acceleration is a2= (9m/s^2)i - (2m/s^2)j The period is more t..
a disk and a hoop have the same mass and same radius. Explain why the disk reaches the bottom of the incline first
the block diagram of the control of an electric heating system. the heater is driven from a voltage-controlled power
An electron (charge -e) is projected horizontally into the space between two oppositely charged parallel plates. The electric field between the plates is 462N/C upward.
Dr Jeeves has invented a new kind of heat engine that operates using a pool of molten copper at 1083 degrees celcius and a block of solid lead at 327 degrees celcius. How much power is produced by the engine
You are the operator of a 15,000 V rms, 60 Hz electrical sub-statin. When you get to work one day, you see that the station is delivering 6.0 MW of power with a power factor of .90. how much power will the station then be delivering
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