If intending to teach his students the constellations by season, why would an astronomy instructor be advised to always assign the stars in the current western sky at the beginning of each term?
What will be an ideal response?
As the Earth revolves around the Sun, the Sun appears to move one degree eastward per day. These stars are, therefore, soon lost in the Sun's glare.
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If the diffusivity of radon gas into nitrogen gas at 20ºC, 1 atm pressure is 0.12 cm^2/s, what would you expect the diffusivity to be at 30ºC, 2 atm pressure?
What will be an ideal response?
Unpolarized light is incident upon two polarization filters that do not have their transmission axes aligned. If of the light passes through this combination of filters, what is the angle between the transmission axes of the filters?
A) 53° B) 73° C) 85° D) 80°
How does the modern value of Hubble's constant compare to Hubble's original published value?
A) They are very similar. B) The modern value is about 7 times lower than the original value. C) The modern value is about 7 times higher than the original value. D) The modern value is about 700 times lower than the original value. E) The modern value is about 700 times higher than the original value.
The Large Hadron Collider is expected to produce protons with kinetic energy 7 TeV. What is the speed of these protons?
A) less than 0.9000 c B) 0.9500 c C) 0.9990 c D) greater than 0.9999 c E) 0.9000 c