If the turn-off point of a cluster lies about type F, this cluster is very ________
Fill in the blank(s) with correct word
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Which of the following general statements about Earth's atmosphere is not true?
A) The nitrogen and oxygen in Earth's atmosphere keep the surface pleasantly warm. B) Atmospheric pressure decreases with altitude. C) Even in low-Earth orbit, some atmospheric gas is still present. D) Atmospheric scattering of light explains why our daytime sky is bright and blue.
An electron moving from the negative terminal to the positive terminal of a 12. volt battery gains (or loses) how much energy? (Be sure to indicate whether it is a gain or loss.)
What will be an ideal response?
An incompressible fluid flows steadily through a pipe that has a change in diameter. The fluid speed at a location where the pipe diameter is 8.0 cm is 1.28 m/s. What is the fluid speed at a location where the diameter has narrowed to 4.0 cm?
A) 0.32 m/s B) 0.64 m/s C) 1.28 m/s D) 2.56 m/s E) 5.12 m/s
The background microwave radiation, discovered in 1965 by Penzias and Wilson, has its peak intensity at a wavelength of 1.06 mm
What blackbody temperature does this wavelength imply for the universe? (? = 5.670 × 10-8 W/m2 • K4, Wien displacement law constant is 2.90 × 10-3 m • K) A) 0.00°C B) 0.0027 K C) -2.7°C D) -270°C E) 2.7°C