Which one of the following reactions is the most similar chemically to combustion?
A) fusion in stars
B) vaporization in the atmosphere
C) respiration in animals
D) fission in nuclear reactors
E) photosynthesis in plants
C
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__________is a unit of distance equal to the distance light travels in 1 year
A) The astronomical year B) The light-year C) A light parsec D) A light meter
Single-Slit Diffraction: A beam of light of wavelength 610 nm passes through a slit that is 1.90 µm wide. At what the angle away from the centerline does the first dark fringe occur?
A. 9.35° B. 11.4° C. 12.2° D. 39.9° E. 18.7°
A star (no matter what its mass) spends most of its life
A) as a main-sequence star. B) as a T-Tauri variable star. C) as a planetary nebula. D) as a protostar. E) as a red giant or supergiant.
The planetary model of the hydrogen atom consists of an electron in a circular orbit about a proton. The motion of the electron of charge 1.60 × 10^?19 C creates an electric current. The radius of the electron orbit is 5.30 × 10^?11 m and the electron's velocity is 2.20 × 10^6 m/s. What is the magnetic field strength at the location of the proton?