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A ball of mass 5.0 kg is lifted off the floor a distance of 1.7m. What is the change in gravitational potential energy of the ball? If the ball is released from rest and falls to the floor, what is the kinetic energy of the ball just before it hits the floor? what is it velocity? What if it was attached to a parachute, is the KE same, larger or smaller and it mechanic energy conserved in this case?
A 7.0-kg block slides down a frictionless incline making an angle of 60.0° withthe horizontal. What is the total work done on the blockwhen the block slides 1.1 m
A free electron is placed between two large, parallel,nonconducting plates that are horizontal and 1.6 cm apart. One plate has a uniform positivecharge; the other has an equal amount of uniform negative charge.The force on the electron due to the ..
A capacitor has parallel plates of area 12cm^2separated by 2.5 mm. The space between the plates is filled with polystyrene (K=2.6,Em=2.0*10^7 V/m). Find the permittivity of polystyrene
A charge +q is located at the origin, while an identical charge is located on the x axis at x = +0.76 m. Where should the third charge be located
A cancer treatment called the gamma knife uses focused 60Co sources to treat tumors. Each 60Co nucleus emits two gamma rays, Determine the effective radiation dose received by the tumor
a truck on a straight road starts from rest accelerating at 2.00 ms2 until it reaches a speed of 42.0 ms. then the
a variable capacitor consists of two thin coaxial metal cylinders of radii a and b with b-altlta free to move with
two stars with masses m1 and m2 that are initially very far apart and at rest and even farther from any other stars are
a 0.25 harmonic oscillator has a total oscillation energy of 9.9 j. if the oscillation amplitude is 20.0 cm what is the
explain how much charge is on each plate. What is the work done by the field on the electron.
A 2.50-kg ball, moving to the right at a velocity of +3.83 m/s on a frictionless table, collides head-on with a stationary 8.10-kg ball. Find the final velocities of (a) the 2.50-kg ball and of (b) the 8.10-kg ball if the collision is elastic. (c) Fi..
A converging lens and a diverging lens, separated by a distance of 30.0 cm, are used in combination. What is the focal length of the diverging lens
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