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Q. A force F = (2.0 N/m^2)x^2i is applied to a particle initially at rest in the xy plane. Find the work done by this force on the particle and the final speed of the particle as it moves along a path that is (a) in a straight line from point (2.0 m, 2.0 m) to point (2.0 m, 7.0 m) and (b) in a straight line from point (2.0 m, 2.0 m) to point (5.0 m, 6.0 m). The given force is the only force doing work on the particle.
Q. A dolphin in 25 degree C sea water emits a sound direct toward the bottom of the ocean 126 m below. How much time passes before it hears an echo?
Jupiter emits radio waves and also visible light (reflected Sunlight). Which of the following statements about the light we detect from Jupiter is true.
It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes.
The drawing shows a mercury barometer. Consider two barometers, one using mercury and another using an unknown liquid. assume that the pressure above the liquid in each tube is negligible. The height of the unknown liquid is 18.3 times greater tha..
A pipe open at one end has a fundamental frequency of 256 Hz. A second pipe,identical to first pipe, is shortened by cutting off a portion of the open end. When both pipes vibrate at their fundamental frequencies, a beat frequency of 12 Hz is heard..
A uniform plank of length 5.40 m and weight 217 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 417 N walk on the overhanging part of the plank before it immedia..
You then maintain a constant speed of 65.0 mph. You pass the patrol car 16 seconds after you at first applied the brakes and are relieved that he doesn't pull out after you. How far away was the highway patrol car when you first saw it.
A 6 kg block slides along a frictionless horizontal surface. The block is acted on by two forces, a 4.5 N force to the left, and a 7.5 N force to the right. At what rate is the 4.5 N force doing work on the block at the instant when its speed is 4..
Find the difference in decibel levels β1 & β2 of a sound source is related to the ratio of its distances r1 & r2 and find the average power generated by the horn.
Assume a neuron in the brain carries a current of. Treating the neuron as a straight wire, what is the magnetic field it produces at a distance of 7.50.
A water pipe is inclined 32.0° below the horizontal. The radius of the pipe at the upper end is 3.00 cm. If the gauge pressure at a point at the upper end is 0.117 atm, what is the gauge pressure at a point 2.65 m downstream, where the pipe has narro..
To store the energy produced in 1hour by a 110 electric power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir? Suppose the upper reservoir is 510 meters above the lower one, and we can neglect the sm..
A stone with a mass of 0.700 is attached to one end of a string 0.8 long. The string will break if its tension exceeds 65.0 . The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed.
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