Galaxies with disks but no evident spiral arms are called
A) irregular galaxies
B) lenticular galaxies
C) barred spiral galaxies
D) elliptical galaxies
B) lenticular galaxies
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Consider the ratio of the surface area of a cylinder to its volume. Assume the height is equal to its diameter. What happens to this ratio if the diameter of the cylinder decreases by a factor of 2?
A. Remains the same B. Decreases by a factor of 2 C. Increases by a factor of 2 D. Decreases by a factor of 4 E. Increases by a factor of 4
The pressure of an interstellar gas cloud depends on the cloud's ____________________ and ____________________
Fill in the blank(s) with correct word
If the maximum possible accuracy in measuring the lifetime of a particle increases, the maximum possible accuracy in measuring its energy will
A) increase. B) decrease. C) not be affected.
Order the following from most recent to least. I. Big Bang II. Age of quasars III. First humans IV. Cambrian explosion V. Formation of the solar system VI. First life VII. Recombination Period
a. I, II, VII, IV, V, VI, III b. I, VI, VII, II, V, IV, III c. I, VI, V, VII, III, II, IV d. I, VII, II, V, VI, IV, III