List the two major regions of the near side of the Moon, as seen with the naked eye
What will be an ideal response?
The darker maria and the brighter highlands
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Which of the following planets is an example of a Terrestrial planet?
A) Uranus B) Venus C) Jupiter D) Neptune
Coulomb's Law: The zirconium nucleus contains 40 protons, and an electron is 1.0 nm from the nucleus. What is the electric force on the electron due to the nucleus? ( e = 1.60 × 10-19 C, k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 2.9 nN B. 1000 C C. 3.7 nN D. 6.8 nN E. 9.2 nN
The parallax of a star is ________ usually measured in ________.
A. a distance; AUs B. an angle; arc seconds C. a distance; arc seconds D. an angle; parsecs
A rock sample contains 1/2 microgram of the parent radioactive isotope U-235 and 1/2 microgram of its daughter isotope Pb-207. If the half-life of this decay is 700 million years, how old is this rock?
A) 1400 million years B) 2100 million years C) 700 million years D) 350 million years