Air at a temperature of 32°F has a relative humidity of 60%. If the temperature of the same air increases, the relative humidity increases
Indicate whether the statement is true or false
F
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If you are standing at the Earth's North Pole, which of the following would be located at the zenith?
a. The nadir b. The star Vega c. The celestial equator d. The north celestial pole
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 also heated to 400 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.
One of the biggest problems for ground-based astronomy today is
A. atmospheric pollution has significantly worsened the seeing. B. light pollution makes it difficult to observe faint objects. C. all the best mountains already have telescopes on them. D. space-based observatories are making most of the observations.
The average density of the planet Jupiter has been known for hundreds of years, but the densities of its Galilean moons were only determined accurately from data obtained during the Voyager by-pass missions. Why?
What will be an ideal response?