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In the figure below, sources A and B emit long-range radio waves of wavelength λ =430 m, by the phase of the emission from A ahead of that from source B by 90°. The distance r A from A to detector D is greater than the corresponding distance B with 150 m. What is the phase difference at D?
A day on a distant planet observed orbiting a nearby star is 41.9 hours. Calculate the average angular speed of the planet as it travels around its neighboring star
Monochromatic light (lambda = 670 nm) is incident on a single slit and forms a diffraction patter on a screen 95 cm away. what is the separation between the first-order minima
a fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. the
gold which has a density of 19.32 gcm3 is the most ductile metal and can be pressed into a thin leaf or drawn out into
Assume that a binary star system consists of two stars of equal mass. They are observed to be separated by 310 million kilometres and take 4.0 Earth years to orbit about the point midway between them.
A pump is required to lift 20 kilogram of water per minute through a height of 4.00 meter. Find what output power rating in watts should the pump motor have
A turtle ambles lesisurely- as turtles tend to do- when it moves from a location with position vector r1x = 1.07 m, find the magnitude of the turtle's average velocity
A long rope is suspended from the ceiling. Waves are started from the bottom traveling up the rope. It is observed that their speed changes as they move up the rope. Do they get faster or slower? Explain why this occurs.
A parallel-plate capacitor has plates of area 0.2 m2separated by a distance of 0.003 m. What is the strength of theelectric field between these plates when this capacitor isconnected to a 5-V battery?
Imagine that Earth is struck by a meteor with a mass of 5.23 x 1015 kg, and a speed of 8100 m/s. What speed would such a meteor give Earth in a head-on collision
the distance between 2 telephone poles is 50.0 m. when a 1.00 kg bird lands on the telephone wire midway between the
A block of wood of mass 0.938 kg is initially at rest. A bullet of mass 0.0492 kg traveling at 107 m/s strikes the block and becomes embedded in it. With what speed do the block of wood
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