In the eighteenth and nineteenth centuries, the rare transits of ________ were critical in determining the astronomical unit's length
Fill in the blank(s) with correct word
Venus
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When an ice cube in a glass of water melts, the water level
A) rises. B) falls. C) remains the same.
If the Sun passes almost in front of the center of our Milky Way Galaxy, it does so
A) once a year. B) once a day. C) only in 2012, at the end of the Mayan calendar. D) once a month.
A metal having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 4.0 eV. What is the maximum kinetic energy of the photoelectrons produced by this light? (h = 6.626 × 10-34 J • s, 1 eV = 1.60 × 10-19 J)
A) 2.6 × 10-19 J B) 3.8 × 10-19 J C) 4.7 × 10-19 J D) 5.5 × 10-19 J E) 6.4 × 10-19 J
A pair of narrow slits, separated by 1.8 mm, is illuminated by a monochromatic light source. Light waves arrive at the two slits in phase, and a fringe pattern is observed on a screen 4.8 m from the slits
If there are 5.0 complete bright fringes per centimeter on the screen near the center of the pattern, what is the wavelength of the monochromatic light? A) 700 nm B) 650 nm C) 550 nm D) 600 nm E) 750 nm