Choose the correct word(s) that make the statement true. The stars appear to rise and set from east to west, but really the sky is not moving and Earth is rotating from (north, south, east, west) to (north, south, east, west)
What will be an ideal response?
west, east
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Spherical Mirrors: If an object is placed at the center of curvature of concave mirror, the image formed by the mirror is located
A. out beyond the center of curvature. B. at the center of curvature. C. between the center of curvature and the focal point. D. at the focal point. E. at infinity.
From shortest to longest wavelength, which of the following correctly orders the different categories of electromagnetic radiation?
A) infrared, visible light, ultraviolet, X-rays, gamma rays, radio B) radio, infrared, visible light, ultraviolet, X-rays, gamma rays C) visible light, infrared, X-rays, ultraviolet, gamma rays, radio D) gamma rays, X-rays, ultraviolet, visible light, infrared, radio E) gamma rays, X-rays, visible light, ultraviolet, infrared, radio
Helium-neon laser light has a wavelength in air of 632.8 nm. What is the energy of a single photon in the beam? (h = 6.626 × 10^?34 J?s and c = 3.00 × 10^8 m/s)
a. 3.14 × 10^?19 J b. 5.40 × 10^?19 J c. 7.62 × 10^?19 J d. 1.15 × 10^?18 J
A point charge Q is placed on the x axis at x = 2.0 m. A second point charge, -Q, is placed at x = 3.0 m. If Q = 40 mC, what is the magnitude of the electrostatic force on a 30-mC charge placed at the origin?
a. 7.2 N b. 3.9 N c. 1.5 N d. 14 N e. 8.1 N