It's cold. You are sitting on what appears to be a water ice-covered world. The Sun is low on the horizon and circles the horizon once every 24 hours
Despite the low Sun, you can almost "feel" the Sun's ultraviolet radiation on your exposed face because there is little ozone to protect you. Despite these discomforts, you are pleased to find that the air is quite satisfactory; oxygen seems plentiful and you are able to breathe even without the life-support belt.
You have returned to Earth, in the Antarctic spring. (The ozone hole appears during the spring.)
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A ray of light, which is traveling in air, is incident on a glass plate at a 45° angle. The angle of refraction in the glass
A) is less than 45°. B) is greater than 45°. C) is equal to 45°. D) could be any of the above; it all depends on the index of refraction of glass.
Estimate the mass diffusivity of methane into air at 300 K, assuming ideal gas behavior.
What will be an ideal response?
The potential energy for the formation of a hydrogen molecule can be approximated by U = -A + BR + C/R, where R is the nuclear separation. Given that A = -78.5 eV, B = 2.57 × 1011 eV/m , and C = 1.44 × 10-9 eV?m
At what nuclear separation is the potential energy a minimum? A) 1.9 × 10-11 m B) 3.7 × 10-10 m C) 7.5 × 10-11 m D) 2.9 × 10-11 m E) 5.1 × 10-10 m
The Great Nebula in Orion, M-42, is a low-density cloud of hot gas. Use Kirchhoff's laws to describe its spectrum
What will be an ideal response?