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A truck can move up a road having a grade of 1.0-ft rise every 50-ft with a speed of 15 mi/h. The resisting force is equal to one twenty-fifth the weight of the truck. If its power output is the same, how fast will the same truck move down the hill? Assume that the resisting force remains unchanged.
Find the work function of the emitting surface and the wavelength of the second source. Determine the net work done on the piano.
A grating with 1300 slits percentimeter is illuminated with light of wavelength 500 nm. What is the highest order number that can be observed with this grating
An electron is moving through a magnetic field whose magnitude is 8.76 x 10-4 T. The electron experiences only a magnetic force and has an acceleration of magnitude 3.32 x 1014 m/s2.
The intensity level produced by a jet airplane at a certain location is 163 dB. Calculate the intensity of the sound wave generated by the jet at the given location.
A transmission line that has a resistance per unit length of4.5*10^-4 ohms/meter is to be used to transmit 5.00MW over 400miles (6.44 *10^5m). WHat fraction of the input power is lost to the line underthese circumstances
at a certain location in africa a compass points 12ordm west of the geographic north. the north tip of the magnetic
A cylindrical aluminum rod, with an initial length of 0.8200 m and radius 1200.0 µm, is clamped in place at one end and then stretched by a machine pulling parallel to its length at its other end. Assuming that the rod's density (mass per unit volume..
A highly polished silver hemisphere of radius R rests with its base on a level table. What must be the diameter of the beam if light from the outer edges of the beam is reflected horizontally
A compressed-air cylinder is known to fail if the pressue exceeds 100 atm. A cylinder that was filled to 20 atm at 22°C is stored in a warehouse. Unfortunately, the warehouse catches fire and the temperature reaches 900°C. What is the pressure ins..
a dock worker applies a constant horizontal force of 78.0 to a block of ice on a smooth horizontal floor. the
Two freight cars, each with a mass of 2.9 x 10^5 kg, collide and stick together. One was initially moving at 2.80 m/s and the other was at rest. What is the final speed.
A wave pulse travels down a slinky. The mass of the slinky is m = 0.85 kg and is initially stretched to a length L = 6.2 m. compute the speed of the wave pulse
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