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A mountain climber stands at the top of a 52.8m cliff hanging over a calm pool of wat. The climber throws two stones vertically 1.9 s apart and observes that they cause a single splash when they hit the water. The first stone has an initial velocity of +1.9m/s. Find the velocity of the first stone at the instant both stones hit the water. The acceleration of gravity is 9.81m/s2. Answer in units of m/s.
Infrared light of wavelength 1.17 um illuminates a 0.34-mm-diameter hole. What is the angle of the first dark fringe in degrees
One of the weapons considered for the "Star Wars" antimissile system is a laser that could destroy ballistic missiles. What laser beam intensity will produce such a field
A 60.0 resistor is connected in parallel with a 117.0 resistor, Find the current in the 117.0 resistor and Find the power dissipated in the 117.0 resistor
Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully). How far apart are the half-kilogram marks on the scale
The electrical field within a continuous distribution of charge is given by the equation E= cxi+cyj+czk, Write the equation for E in terms of the position vector r
A beam of protons, each with kinetic energy 40 MeV, approaches a step potential of 30 MeV. What fraction of the beam is reflected and what fraction transmitted
A wire streches from the top of a vertical pole to a point on level ground 16 feet from the base of the pole. if the wire makes an angle of 62 degrees withe the ground, find the height of the pole and length of the wire.
q1. using the equation fm v2r for a force an object in circular motion. find the radius r of motion of a m1.6 kg ball
A ball is thrown upward at 20 m/s from the top of a building, which is 100 meter high. Another ball is thrown downward from the top of the building at 15 m/s. What is their final speed when they hit the ground
A spherical conductor with radius 2.00 cm is centered on the origin and holds charge q1=-250 nC, Find the surface charge density a(charge per area) on the outside surface of the outer spherical shell
On dry land, an athlete weighs 63.7kg . The same athlete, when submerged in a swimming pool and hanging from a scale, Determine the athlete's percent body fat
It has been suggested that rotating cylinders about 10 mi long and 5.0 mi in diameter be placed in space and used as colonies. What angular speed should such a cylinder have so that the centripetal acceleration at its surface equals the free-fall ..
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