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in one of Michelson 's experiments, the distance between the two stations is 36.9 km. the octagonal mirror has to be rotated at the rate of 500 rev/sec for getting the null position . if the distance between two stations is reduced by 350 metre , find the speed of mirror which will again give no shift position .
With what speed in miles/hr (1 m/s = 2.23 mi/hr) must an object be thrown to reach a height of 91.5 m (equivalent to one football field)? Assume negligible air resistance.
A 8.5 kg block moves at 9 m/s to the right while a 8.5 kg block moves at 10 m/s to the right. Find the kinetic energy relative to the center of mass
A wooden raft has a mass of 92kg. When empty it floats in water (density 1000 kg/m3) with 48 percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
The beam emerging from a ruby laser (wavelength 694.3 nm) passes through a circular aperture 6.2 mm in diameter. what is the angular spread of the beam
A dolphin in seawater at a temperature of 25 °C emits a sound wave directed toward the ocean floor 246 m below. How much time passes before it hears an echo? (The speed of sound in ocean water is 1533 m/s.)
Assume you seated on a wheeled desk chair at your desk. Consider friction forces between the floor and the chair to be negligible. Compute the reaction force to the force that caused your acceleration
A transformer has the voltages 121 Vpri and 45 Vsec. What is the current flowing in the secondary
A fisherman is fishing from a bridge and is using a "30.0-N test line." In other words, the line will sustain a maximum force of 30.0 N without breaking. What is the weight of the heaviest fish that can be pulled up vertically.
In a ballistics test at the police department, Officer Rios fires a 6.0gram bullet at 350m/s in to a container that stops it in 1.8milliseconds. What is the average force acting on the bullet
A bullet of mass 0.0025 kg moving at 581 m/s impacts a large fixed block of wood and travels 5.40 cm before coming to rest.
A small immersion heater is rated at 329 W. Compute approximately how long it would take to heat a cup of soup (suppose this is 250 mL of water) from 20°C to 50°C.
A 3.6cm strip of wire is connected to a battery andperpendictular to the magnetic field of a solenoid is 15cm long andmade of 12,600 loops.calculate thecurrent in the strip of wire
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