Look once more at the objects you ranked in Parts A and B. This time, rank the objects from left to right based on how much they have aged since they emitted the light we see today, from greatest to least.
Ans: Picture above
Aged Most
1) Star on the far side of the Andromeda Galaxy
2) Star on the near side of the Andromeda Galaxy
3) Star on the far side of the Milky Way Galaxy
4) Star near center of Milky Way Galaxy
5) Orion Nebula
6) Alpha Centauri
7) Pluto
8) The Sun
Aged Least
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What is the energy of a photon with the Compton wavelength (0.00437 nm)? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, and 1 eV = 1.60 × 10^?19 J)
a. 4.55E–14 eV b. 2.84E+5 eV c. 2.84E+1 eV d. 3.52E–6 eV e. 4.55E+5 eV
Some of Earth's artificial satellites orbit in the
a. stratosphere. b. troposphere. c. mesosphere. d. thermosphere. e. exosphere.
Which of the following statements about ozone (in Earth's stratosphere) is not true?
A) The presence of ozone was crucial to the origin of life. B) If the ozone layer is depleted, we can expect the rate of mutations in land-based life-forms to increase significantly. C) Ozone absorbs ultraviolet light from the Sun. D) The human-made chemicals known as CFCs can cause a loss of ozone in the atmosphere.
Air within the funnel of a large tornado may have a pressure of only 0.2 atm. What is the approximate outward force on a (5 m × 10 m) wall if a tornado suddenly envelops the house? (1 atm = 1.01 × 105 N/m2.)
A. 4 × 103 N B. 4 × 104 N C. 4 × 105 N D. 4 × 106 N E. 7 × 105 N