What is the most abundant gas in the atmospheres of Mars and Venus? Explain why it is not as abundant in Earth's atmosphere
What will be an ideal response?
The carbon dioxide so abundant on our neighbors was first dissolved in the Earth's early water oceans, then deposited beneath them in carbonate rocks such as limestone. Also, photosynthesis took much of the remaining carbon dioxide and water and combined them to make carbohydrates and release oxygen into our unique atmosphere.
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Impulse: Three cars, car X, car Y, and car Z, begin accelerating from rest at the same time. Car X is more massive than car Y, which is more massive than car Z. The net accelerating force exerted on each car is identical. After 10 seconds, which car has the most amount of momentum?
A. They all have the same amount of momentum. B. Car X C. Car Y D. Car Z
The first successful landers on the surface of Mars were:
A) Mariners 4 and 5 in 1965. B) Vikings 1 and 2 in 1976. C) Voyagers 1 and 2 in 1979. D) Pathfinder and Sojourner in 1997. E) Spirit and Opportunity in 2004.
Low levels of ionizing radiation
a. are dangerous to the human body b. can be tolerated by the human body c. are beneficial to the human body d. none of the above
If an electron is accelerated from rest through a potential difference of 9.9 kV, what is its resulting speed? (e = 1.60 × 10-19 C, k = 1/4??0 = 8.99 × 109 N ? m2/C2, mel = 9.11 x 10-31 kg)
A) 3.9 × 107 m/s B) 5.9 × 107 m/s C) 2.9 × 107 m/s D) 4.9 × 107 m/s