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A block of mass m is thrown vertically down from a height of 8m. determine the mass of the block, its initial and final velocities and the potential and kinetic energies at the start and end of its travel. The Kinetic energies of the block when it is 2m below the start is 250J and 642 J when it is 2m above the ground.
The magnetic field in an electromagnetic wave has a peak value given by B = 2.7mu T. Find the average intensity
A solid uniform marble and a block of ice, each with the same mass, start from rest at the same height, Which object is moving faster at the bottom, the ice or the marble
Two events occur in an inertial system at the same time, but 7200 km apart. What is the time difference between the two events
A point particle with charge q=4.6uC is placed on the x axis at x=-10cm and a second charge Q = 7.7uC is placed on the x axis at x=+25cm. Determine the x and y components of the electric field
According to a commentary in the Journal of the American Medical Association: Thus, vitamin E enters the category of therapies that were promising in epidemiologic and observational studies but failed to deliver in adequately powered randomized co..
A solid sphere starts from rest at the upper end of the track, as shown in figure below, and rolls without slipping until it rolls off the right-hand end. If H = 13.0 m and h = 3.50 m and the track is horizontal at the right-hand end, how far hori..
A diver springs upward from a diving board. At the instant she contacts the water, her speed is 9.50 m/s, Determine her initial velocity, both magnitude and direction
A 4.94-g bullet is shot through a 0.99-kg wood block suspended on a string 2.00 m long. The center of mass of the blockrises a distance of 0.50 cm. Find the speed of the bullet as itemerges from the block if its initial speed is 393 m/s.
A weight lifter lifts a 420 N set of weights from ground level to a position over his head, a vertical distance of 1.70 m. How much work does the weight lifter do, assuming he moves the weights at constant speed?
four charges are placed at the corners of a square of side 4 cm. What is the electrostatic potential energy of this system relative to infinity
Three metal fishing weights, each with a mass of1.00x102g and at a temperature of 100.0oC,are placed in 1.00x102g of water 35.0oC. The final temperature of the mixture is 45.0oC. What is the specific heat of the metal in the weights?
One cubic foot of water can store 312 Btu of thermal energy. On a cold winter day a well-constructed home may require 100,000 Btu of nighttime space heating.
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