A plot of the continuous spectra of five different stars is shown in the figure. Based on these spectra, which of the stars has the lowest temperature?
a. Star A
b. Star B
c. Star C
d. Star D
e. Star E
E
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Which of the following best describes the modern definition of a constellation
a) a group of stars that all lie at about the same distance from Earth b)a region of the celestial sphere c)a pattern of bright stars in the sky
The Sun's path, as viewed from the equator, is highest in the sky on
A) the winter solstice. B) the spring and fall equinoxes. C) the summer solstice. D) the day when Earth is closest to the Sun.
A prankster drops a water balloon from the top of a building. If the balloon is traveling at 29.1 m/s when it strikes a window ledge that is 1.5 m above the ground, how tall is the building? Neglect air resistance
A) 45 m B) 43 m C) 46 m D) 47 m
X-rays of wavelength of 0.0656 nm undergo Compton scattering from free electrons in carbon. What is the wavelength of photons scattered at 82.5° relative to the incident beam? (h = 6.63 × 10^?34 J?s, me = 9.11 × 10^?31 kg, c = 3.00 × 10^8 m/s, and 1 nm = 10?9 m)
a. 0.0656 nm b. 0.0677 nm c. 0.0848 nm d. 0.0719 nm e. 0.0659 nm