Due to absorption of shorter wavelengths by interstellar dust clouds, distant stars appear
A) brighter.
B) redder.
C) larger.
D) bluer.
E) to have a higher radial velocity.
B
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The Jovian planets formed beyond the _______________, where water vapor, methane, and ammonia could freeze to form ice particles
Fill in the blank(s) with correct word
How does an H-R diagram make it clear that giant stars are larger than main-sequence stars of the same temperature?
What will be an ideal response?
You are heating two chunks of metal of the same size and shape. One is made of lead and is heated to 400 K. The other is made of iron and is heated to 350 K. Which of the following statements apply to the thermal radiation the two chunks emit?
A) The two spectra peak at the same wavelength. B) The spectra cannot be compared because they come from different materials. C) The lead spectrum peak is at a shorter wavelength than the iron spectrum peak. D) The lead spectrum peak is at a longer wavelength than the iron spectrum peak.
The period of a satellite circling planet Nutron is observed to be 84 s when it is in a circular orbit with a radius of 8.0 × 10^6 m. What is the mass of planet Nutron?
a. 6.2 × 10^28 kg b. 5.0 × 10^28 kg c. 5.5 × 10^28 kg d. 4.3 × 10^28 kg e. 3.7 × 10^28 kg