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A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than to the other. He fires a gun and, after a while, hears three echoes. The second echo arrives 1.9 sec after the first, and the third echo arrives 1 sec after the second. Suppose that the speed of sound is 343 m/s and that there are no reflections of sound from the ground, compute the distance between the cliffs.
A physical pendulum consists of auniform rod of length L = 1.5 meters. What is the angular kinetic energy of the rod after 1.0 sec
Two thin, positively charged rods are placed along the x-axis and y-axis. Each rod is 3.00m in length, and is a distance 1.00m from the origin. Find the electric field produced by each rod individually at the origin
question it takes you 9.5 minutes to walk with an average velocity of 1.2 ms to the north from the bus stop to museum
If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.7 m/s2, what is a force exerted by the scale.
A heat engine with an efficiency of 35% performs 160j of work, how much heat is discharged to the lower temperature
If a man is capable of lifting a 121 lb stone on land, how heavy a stone could he lift under water
A passenger on a stopped bus notices that rain is fallingvertically just outside the window. When the bus moves with theconstant velocity, the passenger observes that the fallingraindrops are now making an angle of 19º with respect to the vertical..
A bullet of mass mb is fired horizontally with speed v1 at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the bloc..
a 3250 kg open railroad car coasts along with a constant speed of 10.6ms on a level track. snow begins to fall
a wire is 1.2 m long and has a mass of 0.027 kg. the wire is stretched between two points and when driven by an
a sample of ideal gas occupies a volume of 1.5 l and is under a pressure of 300 kpa. the gas undergoes an isothermal
A 10-kg bullet is fired horizontally into a 300-g wooden block initially at res on a horizontal surface and become embedded in it. The coefficient of friction between block and surface is (0.50).
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