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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 the other. He fires a gun and, after a while, hears three echoes. The second echo arrives 1.39 s after the first, and the third echo arrives 1.13 s after the second. Assuming that the speed of sound is 343 m/s and that there are no reflections of sound from the ground, find the distance (in m) between the cliffs.
a super-particle travels forward along a straight cylindrical tube at 1000 m/s for 10 m, What is the average velocity
If the tension in each chain at the lowest point is 408 N, find the child's speed at the lowest point.
An 18 g rifle bullet travelling 180m/s buries itself in a 3.6kg pendulum hanging on a 2.8 m long string, which makes the pendulum swing upward in an arc. Verify the horizontal component of the pendulum's displacement.
A three-step cycle is undergone by n moles of an ideal diatomic gas: (1) the temperature of the gas is increased from T_1 to T_2 at constant volume, compute the efficiency of the cycle in terms of T_1 and T_2
Find out the wavelengths of the light.
Suppose a tank contains 770 m3 of neon (Ne) at an absolute pressure of 1.01×105 Pa. The temperature is changed from 293.2 to 295.6 K. What is the increase in the internal energy of the neon?
A supertanker filled with oil has a total mass of 6.1 x 108 kg. how far below the water level is the bottom of the tanker
A 70,000 kg spaceship wants to orbit a tiny black hole at a height of 10,000 m. What speed should the captain tell the computer to set the spaceship for
A 1.00 kg beaker containing 2.00 kg of oil (density=900kg/m^3 rests on a scale, Find the equilibrium readings of both scales
An x-ray photon of 0.12 nm strikes a metal and undergoes Compton scattering of the electrons in the metal. What is the momentum of the incident photon
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 14rpm in 9.8s, What force is required at the edge
A wood block floats on water with 35% of its volume above the surface (of water), what is the average density of the block (in kg/m3)
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