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Light falling normally on a 800 line/cm grating produces a spectrum that contains three lines in the second order (m=2) at angles of 31.2 degree,36.4 degree,47.5 degree. Decide the wavelengths responsible.
A guitar string is 90.0 centimeter long and has a mass of 3.21 gram. Find the frequencies of the fundamental and first two overtones
A 17g rifle bullet travelling 220 m/s buries itself in a 3.90 kg pendulum hanging on a 3m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of the pendulum's displacement.
A reasonable estimate of the moment of inertia of an ice skater spinning with her arms at her sides can be made by modeling most of her body as a uniform cylinder. Estimate the skater's moment of inertia to two significant figures
In an EM wave traveling west, the B field oscillates vertically and has a frequency of 84.0 kHz and an rms strength of 6.30×10^?9T.
A hollow cylinder (hoop) is rolling on a horizontal surface atspeed v = 1.95 m/s when itstarts up a 23.5° incline. How far along the incline will it go
q1. a weight of 1200 n rests on a lever at a point 0.50 m from a support. on the same side of the support at a distance
The catapults on the USS George H.W. Bush can launch aircraft from rest to a speed of 150 mph over a distance of 270 feet. Find the acceleration of the aircraft
a reflecting telescope has a radius of curvature of 2.8 m for its objective mirror and a radius of curvature of -1.5 m
A merry-go-round accelerating uniformly from rest achieves its operating speed of 2.5 rpm in five revolutions. Find how many seconds does it take the merry-go-round to reach its operating speed
A 70-kg sky diver jumped out of an airplane at an altitude of 0.80 km. She opened her parachute after a while and eventually landed on the ground with a speed of 5.2 m/s. How much energy was dissipated with air resistance through the jump?
A diesel engine performs an amount of mechanical work equal to 2800Jand discards an amount of heat equal to 4800J each cycle. What is the thermal efficiency of the engine
a bucket of water with a mass of 7.0 kg is attached to a rope that is wound around a cylinder. the cylinder has a mass
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