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A man strikes one end of a thin rod with a hammer. The speed of sound in the rod is 16 times the speed of sound in air. A woman, at the other end with her ear close to the rod, hears the sound of the blow twice with a 0.15 s interval between; one sound comes through the rod and the other comes through the air alongside the rod. If the speed of sound in air is 345 m/s, what is the length of the rod?
The angular momentum of a flywheel having a rotational inertia of 0.100 kg·m2 about its central axis decreases from 3.00 to 0.400 kg·m2/s in 0.80 s. What is the average power of the flywheel
A jellyfish is floating in a water filled aquarium 1.00 m behind a flat pane of glass 6.00 cm thick having an index of refraction of 1.50. a) Where is the image of the jellyfish located?
If a helium nucleus with a mass of 6.68x10^-27kg, a charge of +2e, and an initial velocity of 1.50x10^7 m/s is projected head-on toward a gold nucleus with a charge of +79e, how close will the helium atom come to the gold nucleus before it stops a..
What is the minimum rate of rotation, in revolutions per minute, required for the spheres to contact the cylinder wall?
Two cars have collided at right angles at an intersection: Car A was eastbound; car B was northbound. The marks on the pavement show that the vehicles both moved together in the same direction immediately after the collision. That direction was at..
A quarterback claims that he can throw the football a horizontaldistance of 196.6 m (215 yd). Furthermore,he claims that he can do this by launching the ball at therelatively low angle of 25° above the horizontal. To evaluate his claim, determine ..
A person with mass m1 = 60 kg stands at the left end of a uniform beam with mass m2 = 91 kg and a length L = 3.2 m, What is the location of the center of mass of the system
A 4.4-nF parallel plate capacitor with a sheet of Mylar (? = 3.1) filling the space between the plates is charged to a potential difference of 180 V and is then disconnected. (The initial capacitance including the dielectric is 4.4 nF.)
What is the net charge inside the sphere.
A proton starts out moving horizontally from a positive plate to a negative plate of equal size and equal magnitude of charge. Calculate this difference of heights in meters
A 0.362 kg bead slides on a curved wire, starting from rest at point A, find the speed of the bead at C
A solid wood door 1.00m wide and 2.00 m high is hinged along one side and has a total mass of 44.0 kg. Find the final angular speed of the door
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