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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.
Two equally charged, 1.00 {rm g} spheres are placed with 2.00 {rm cm} between their centers. When free, each begins to acceleration speed at 225 {rm m/s^2}. What is the magnitude of the charge on each sphere.
A 10.64 kilogram bowling ball at 0°C is dropped into a tub containing a mixture of water and ice. Determine from what height was the ball dropped
an ideal fluid is moving at 2.8ms in a section of a pipe of radius 0.18m . if the radius in another section is 0.38m
A factory worker pushes a 28.4 kg crate a distance of 4.9 m along a level floor at constant velocity by pushing downward at an angle of 32degrees below the horizontal. How much work is done on the crate by friction during this displacement
Assuming frictionless conditions, a table has a hanging mass, m1, over a pulley at the left side and another hanging mass, If m1 = .45kg, & m2 = .3kg, & m3 = .25kg what is the new accelration of the system
The convex lens of a copy machine has a focal length of 25.0cm. A letter to be copied is placed 40.0cm from the lens. How far from the lens is the copy paper located? The machine was adjusted to give an enlarged copy of the letter. How much larger wi..
Suppose you are listening to the WKAR FM radio station on a car radio. The carrier frequency of the transmission is 90.5 MHz. Calculate the wavelength of the carrier wave
A resonant circuit using a 220 nF capacitor is to resonate at 18.0 kHz. The inductor in the circuit is to be a solenoid, How many loops will the inductor contain?
A person enters a tall tower, needing to know it's height. If this pendulum is taken to the Moon, where the free-fall acceleration is 1.67 m/s2 what is it's period there
Suppose one bullet with M=5.12g moving to the right with a speed of 250 m/s directed at 21.3 degrees above the horizontal collides, What is the direction of their common velocity immediately after the collision? Measure this angle in degrees from t..
A copper-constantan thermocouple generates a voltage of 5.03 10-3 volts when the temperature of the hot junction is 121.0° C, what is the temperature of the hot junction
A freshly prepared sample of a certain radioactive isotope has an activity of 11.2 mCi. After 4.40 h, its activity is 8.00 mCi. Find the decay constant
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