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Q. A converging lens with a diameter of 26.00 cm forms an image of a satellite passing overhead. The satellite has two green lights (wavelength 500 nm) spaced 1.24 m apart. If the lights can just be resolved according to the Rayleigh criterion, what is the altitude of the satellite?
Two children tug on a toy of mass 2.0 kg. Costa pulls with a force of 10.0N [W 30degrees S]. The toy slides with an acceleration of 2.5 m/s^2 in the direction of the net force.
A 60kg pole vaulter running at 13m/s vaults over the bar. Her speed when she is above the bar is 0.7m/s. Neglect air resistance, as well as any energy absorbed by pole, and determine her altitude as she crosses the bar.
An airplane whose air speed is 608 is supposed to fly in a straight path 38 north of east. But a steady 86 wind is blowing from the north. In what direction must the plane head.
A magnifier has a magnification of 8 times. How far from the lens should an object be placed so that its (virtual) image is at the near-point distance of 25 {rm cm}.
The car has just achieved double its initial velocity when the driver spots a police officer behind him and applies the brakes. The car then slows down, coming to rest at the stoplight ahead.
A 2 kg projectile is fired with an initial speed of 135 m/s at an angle of 68° with the horizontal. At the top of its trajectory, the projectile explodes into two fragments of masses 0.72 kg and 1.28 kg. At 3.8 s after the explosion, the 1.28 kg f..
Two loudspeakers are placed at either end of a gymnasium, both pointing towards each other. The sound emitted by the speakers is in phase and are of frequency of 256 Hz.
A cue ball hits a stationary eight ball on a pool table. For which of the following systems is there a change in momentum during the collision? define why.
Assume that the rod is held at rest horizontally and then released. (Throughout the remainder of this problem, your answer may include the symbol, moment of inertia of the assembly, whether or not you have answered the first part correctly.)
Three identical conducting spheres initially have following charges: sphere A, 5Q; sphere B, -7Q; and sphere C, 0. Spheres A and B is fixed in place, with a center-to-center separation that is much larger than the spheres.
Old naval ships fired 14 kg cannon balls from a 250 kg cannon. It was very important to stop the recoil of the cannon, since otherwise heavy cannon would go careening across the deck of the ship. In one design, a large spring with spring constant 2..
According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Imagine the speed quoted is that of the end of the rod.
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