Chemically based extraterrestrial life
A) will not need to store information
B) may not use DNA to store information but will very likely use a molecule with a similar function
C) will certainly use DNA to store information, but with different nucleotides
D) will certainly use DNA to store information
B
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A satellite is in a circular parking orbit 6.98 × 106 m from the center of Earth. To initiate a Hohmann transfer, a rocket gives it an accelerating thrust so that its speed is increased to 8300 m/s
How far from the center of Earth will the satellite be when it reaches its apogee? The mass of Earth is 5.97 × 1024 kg and G = 6.67 x 10-11 N•m2/kg2. A) 3.12 × 107 m B) 2.48 × 107 m C) 1.06 × 107 m D) 6.73 × 107 m E) 4.75 × 107 m
The most effective wavelengths to see through the clouds of Venus to the surface are ________
Fill in the blank(s) with correct word
Six identical blocks of steel, each with mass 10.0 kg, are taken to the Moon. On the Moon, their combined mass is
A. 60.0 kg. B. zero. C. 10.0 kg. D. 360 kg.
If the orbital velocity of an eclipsing binary is 97 km/sec and the smaller star is completely eclipsed in 2 hours, what is the diameter of the smaller star?
a. 175,000 km b. 350,000 km c. 194 km d. 700,000 km e. 4656 km