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Q. A loudspeaker at a rock concert generates 10-2 W/m2 at 18 m at a frequency of 1 kHz. Suppose that speaker spreads its energy uniformly in all directions. What is the intensity level at 18.00m?
If air resistance is negligible, using energy considerations alone, how fast must the ball be going after it falls 200 meters.
Now a peg is placed 4/5 of the way down the pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its startin..
The lens has a refractive index of 1.30. Find out the difference Δx in the positions where each crosses the principal axis.
A street lamp weight 164N. It is supported equally by two wires that form an angle of 129 degrees with each other. What is the tension of each of these wires.
W hat are underwater angles of refraction
A 12.0 kg bucket of water of is suspended by a rope wrapped around a windlass, which is the solid cylinder 0.500 m in diameter with mass 14.0 kg. The cylinder is pivoted on a frictionless axle through its center. The bucket is released from rest at t..
What are the original charges on each sphere
What is the speed of the 2 cars as they move together after the collision.
What is the distance, measured along the screen, between this bright fringe and bright fringe corresponding to m = 3.
Two speakers, one directly behind the other, are each generating a 295-Hz sound wave. What is the smallest separation distance between the speakers that would produce destructive interference at a listener standing in front of them? Take the speed..
If a bullet is fired vertically upwards with the speed calculated in (b), what is the maximum height that the bullet can reach.
The cockroach finds a bread crumb on the rim and, of course, stops. What is an angular speed of the lazy Susan after the cockroach stops.
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