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The Milky Way has a diameter (proper length) of about 1.2×105 light-years. According to an astronaut, how many years would it take to cross the Milky Way if the speed of the spacecraft is 0.890 c?
The time required for one complete cycle of a mass oscillating at the end of a spring is 0.25s. what is the frequency of oscillation
a an energetic photon of wavelength 5.1 nm scatters off an electron at rest at an angle of 63 degrees. what is the
there are four charges each with a magnitude of 1.88 microc. two are positive and two are negative. the charges are
A vibrating source generates a harmonic wave on a string underconstant tension. If the power delivered to the string is doubled, by what factor does the speed change
What is the de Broglie wavelength of an object with a mass of 1.3 kg moving at a speed of 2.3 m/s? (Useful constant: h = 6.63×10-34 Js.)
a 1.00-kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position. the spring
a glass tube of radius 0.80cm contains liquid mercury to a depth of 64.0cm at 12 deg. find the depth of the mercury
an automobile weighing 3000 lb is put in motion on a level highway and then allowed to coast to rest. its speed is
Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of 448 m/s. What is the temperature (in Kelvin) of the environment
A spring attached to the ceiling of an elevator is 10 cm long when nothing is hanging from it. It is 12 cm long when a certain mass is hanging from it and the elevator is at rest. If the elevator moves upwards at an increasing speed of 4m/s^2, how lo..
A ball bounces upward from the ground with a speed of 14 m/s, How high above the ground does the ball hit the wall
a very thin sheet of brass contains two thin parallel slits. when a laser beam shines on these slits at normal
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