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The distance from earth to the center of our galaxy is about 30,000 light years (1 ly = 1 light year = 9.47 x 10^15 m), as measured by an earth-based observer. A spaceship is to make this journey at a speed of 0.9990c. According to a clock on board the spaceship, how long will it take to make the trip? Express your answer in years. 1 year is equal to 3.16 x 10^7 s.
A photon with energy E collides with a stationary mass m. What is the mass and speed of this particle
If the observer knows his/her speed is 25.0 m/s and the temperature is 30°C, and hears a frequency of 450.0 Hz, what is the frequency heard by the source
What's the magnitude of the electric field at an on-axis point a distance of .7m from a ring of charge with a total charge of .8microC
A man in a restaurant asked a waiter for a juice glass, a dinner plate, water, a match, and a lemon wedge. How did the waiter get the water into the glass
A cyclotron designed to accelerate protons has a magnetic field of magnitude 0.590 T over a region of radius 1.40 m, What is the cyclotron frequency
An aircraft weighing 959 N is accelerated at 9 m/s/s for 11 seconds, How much work was done on the aircraft
Each cable has a length of l = 2.70 -{rm m}. What is the tension T in each of the cables? Use 9.80- {rm m/s}^2 for the magnitude of the acceleration as a result of gravity.
White light, with frequencies ranging from to , is incident on a potassium surface. Find the maximum kinetic energy of electrons ejected from this surface
A light meter stick is balanced at the 60 cm mark with a 200-g mass is hung from the 90 cm mark and a 100-g mass is hung from the 10 cm mark, Find the mass (in g) of the ruler
Find out the magnitude of the wind velocity. Find the direction of the wind velocity.If the wind velocity is 39 due south, in what direction should the pilot set her course to travel due west? Use the same airspeed of 213 .
A spaceship of proper length 308 m takes 0.76 µs to pass an Earth observer. Determine the speed of this spaceship as measured
Visible light of wavelength 480 nm is incident on a diffraction grating with a slit spacing of 0.003 mm
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