The first cells must have been simple, single-celled organisms similar to modern _______________
Fill in the blank(s) with correct word
bacteria
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The fresh newly created surfaces of icy satellites of Jovian planets
a. appear dark in color with few impact craters. b. appear dark in color with many impact craters. c. appear very bright because fresh ice is very reflective. d. generally show long bright grooves and a modest number of impact craters. e. generally have small volcanoes that are active.
Which of the following statements about circumpolar stars is true at all latitudes?
A) They are the stars close to the north celestial pole.
B) They always remain above your horizon.
C) They make relatively small circles, traveling clockwise around the north celestial pole.
D) Like all other stars, they rise in the east and set in the west.
E) You cannot see them from the Southern Hemisphere.
Three disks have the same mass and the same total kinetic energy. Disk #1 has radius R, disk #2 has radius 2R, and disk #3 has radius 3R. Which one has the highest vtranslational?
a. disk #1 b. disk #2 c. disk #3 d. The all have the same vtranslational.
Which of the following waves exhibit interference?
A. Only water B. Only sound C. Sound, water, and light D. Only light E. None of these choices are correct