A temperature of –65 Kelvin is equivalent to _____ degrees Celsius
a. 219.1
b. 208.0
c. –53.9
d. –338.2
d
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A certain crystal has an interatomic spacing of 0.142 nm. If a beam of electrons moving with a speed of 1400 m/s is diffracted from this crystal, what is the de Broglie wavelength of the electron?
A) 420 nm B) 130 nm C) 260 nm D) 502 nm E) 520 nm
How is an x-ray burst (in an x-ray binary system) similar to a nova?
A) Both involve explosions on the surface of stellar corpse. B) Both typically recur every few hours to every few days. C) Both are thought to involve fusion of hydrogen into helium. D) Both result in the complete destruction of their host stars.
What is the most accurate way to determine the distance to a nearby star?
A) Hubble's law B) radar ranging C) stellar parallax D) Cepheid variables E) main-sequence fitting
The definition of "life" requires only that an entity be able to reproduce itself
Indicate whether the statement is true or false