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A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, 11 years have elapsed on earth, and 9.8 years have elapsed on board the ship. How far away is the planet, according to observers on earth?
what is the depth d. what is the angle of refraction.
Now a peg is placed 4/5 of the way down pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its starting po..
A hunter aims directly at a target (on the same level) 140 m away.
What is swimmer velocity relative to the bank
A simple model considers a continent as a block (density ? 2800 kg/m3), estimate the height of the continent above the surrounding mantle rock
A 78-kg base runner begins his slide into second base when he is moving at a speed of 4.2 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches base.
A race car can be slowed with a steady acceleration of -11 m/s2 if the car is going 55m/s how many meters would it travel before it stops?
It has been suggested that rotating cylinders about 10 mi long and 5.0 mi in diameter be placed in space and used as colonies. What angular speed should such a cylinder have so that the centripetal acceleration at its surface equals the free-fall ..
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 460 lines/mm , and the light is observed on a screen 1.7 m b..
Water at a pressure of 3.00*10^5 Pa flows through a horizontal pipe at a speed of 1.00 m/s. The pipe narrows to one-fourth its original diameter
You have a thin lens with a focal point at 1.7 cm. If you place a candle stick at a distance of 3.9 cm from the center of the lens, calculate the distance of the resulting image from the lens
In lab, your instructor generates a standing wave using a thin string of length L = 2.10m fixed at both ends. What is the maximum transverse speed vy of the bead
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