What is the average diameter of the head of a comet?
a. ?1-2 km
b. ?less than 15 km
c. ?50 km
d. ?500 km
e. ?2,500 km
ANSWER: b
You might also like to view...
Which of the following conditions is best suited to create an advection fog?
A) Vertically descending dry, cold air moving over a warm surface B) Vertically rising moist, warm air moving over a cold surface C) Laterally moving dry, cold air moving over a warm surface D) Laterally moving moist, warm air moving over a cold surface
Which of the following is true with respect to Ravenstein's laws of migration?
A. International migration creates no counterflow of migration. B. Long-distance migration generally takes place in the form of moving from one large urban area to another. C. Women are more likely to migrate internationally. D. Step-by-step migration no longer takes place in today's world.
The average per capita world fish catch has increased significantly since 1972
Indicate whether the statement is true or false
Using this nomogram, what is the magnitude of an earthquake that is 500 km from a seismic station and has an amplitude of 0.2 mm?
A. 4.0 B. 10.2 C. 2.0 D. 6.0 E. 7.0