Measuring the Doppler shift of material at various distances from the center of a galaxy can be used to construct a(n) ____________________ for that galaxy

Fill in the blank(s) with correct word


rotation curve

Physics & Space Science

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A rock is thrown directly upward from the edge of the roof of a building that is 66.2 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown

Neglect any effects of air resistance. With what speed was the rock thrown?

Physics & Space Science

Light of wavelength 610 nm is incident on a slit of width 0.20 mm, and a diffraction pattern is produced on a screen that is 2.0 m from the slit. What is the distance of the second dark fringe from the center of the central bright fringe? (1 nm = 10-9 m)

a. 1.4 cm c. 0.68 cm b. 1.2 cm d. 0.92 cm

Physics & Space Science

The International Date Line is a theoretical line following approximately the ______________ meridian

Fill in the blank(s) with correct word

Physics & Space Science

The unit of electrical potential, the volt, is dimensionally equivalent to:

a. J/C. c. F×C. b. J×C. d. C/J.

Physics & Space Science