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An old mining tunnel disappears into a hillside. You would like to know how long the tunnel is, but it’s too dangerous to go inside. However, you figure out a way: using your subsonic loudspeaker and amplifier, you find resonances at 4.5 Hz and 6.3Hz, and at no frequencies in among these. It’s rather chilly inside the tunnel, so you estimate the sound speed to be 335m/s. What’s the result of your measurement?
Water is flowing in a cylindrical pipe of varying circular cross-sectional area, and at all points the water completely fills the pipe. What is the radius of the pipe at this point
A car takes 11 s to go from v = 0 to v = 75 m/s at approximately constant acceleration. If you wish to find the distance travelled using equation d = 1/2 at2, what value should you use for a.
a golfer hits a shot to a green that is elevated 3.20 m above the point where the ball is struck. the ball leaves the
A hydraulic jack is made with a small piston 1.3 cm in diameter that is used to move a large piston 5.2 cm in diameter. how heavy a load can he lift with the jack
Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 134 km long, 39.4 km wide, and 187 m thick.
a 20 kg block is at rest on an incline of 41 degrees. μs=.81 and μk=.69 the acceleration of gravity is 9.8 meters per second squared. what is the acceleration of the block down the incline
A drop of water on a countertop reflects light from a flower held2.80 cm directly above it. What is the focal length of the water drop
A cowboy at a dude ranch fills a horse trough that is 1.50m long, 65cm wide and 45cm deep. He uses a 2cm diameter hose from which water emerges at 1.50m/s.
An autoclave is a device used to sterilize laboratoryinstruments. It is essentially a high-pressure steam boiler andoperates on the same principle as a pressure cooker. What is the temperature of the steam
The two surfaces of a plastic converging lens have equal radii of curvature of 25.0cm, Calculate the index of refraction of the plastic
Monochromatic light is incident on a metal surface. The ejected electrons give rise to a current in a circuit. how will the required stopping potential change
An object initially at rest breaks into two pieces as the result of an explosion. One piece has twice the kinetic energy of the other piece .What is the ratio of the masses of the two pieces? Which piece has the larger mass?
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