A pair of narrow slits that are 1.8 mm apart is illuminated by a monochromatic coherent light source. A fringe pattern is observed on a screen 4.8 m from the slits
If there are 5.0 bright fringes/cm on the screen, what is the wavelength of the monochromatic light?
A) 550 nm
B) 600 nm
C) 650 nm
D) 700 nm
E) 750 nm
E
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The average molecular kinetic energy of a gas can be determined by knowing
A) only the number of molecules in the gas. B) only the volume of the gas. C) only the pressure of the gas. D) only the temperature of the gas. E) All of the above quantities must be known to determine the average molecular kinetic energy.
How do scientists determine the age of the solar system?
A) radiometric dating of the oldest Earth rocks B) radiometric dating of meteorites C) radiometric dating of Moon rocks D) Theoretical calculations tell us how long it has taken the planets to evolve to their present forms.
A star more massive than our Sun
A) will have a longer lifetime B) will have a shorter lifetime C) will have the same lifetime as the Sun D) could have either a longer lifetime or a shorter lifetime depending on its chemical composition
Ptolemy formulated a(n) ____________________ model of the solar system to predict positions of the Sun, Moon, and planets
Fill in the blank(s) with correct word