Normally, solar wind approaches Earth at an average speed of ____
a. ?300 km/sec
b. ?400 km/sec
c. ?500 km/sec
d. ?100 km/sec
e. ?1000 km/sec
ANSWER: b
You might also like to view...
A floating leaf oscillates up and down two complete cycles each second as a water wave passes by. What is the wave's frequency?
A) 0.5 Hz B) 1 Hz C) 2 Hz D) 3 Hz E) 6 Hz
Longitude and latitude are measured using the unit terms of
A) degrees, minutes. B) degrees, minutes, seconds. C) degrees, hours, minutes, seconds. D) miles, feet, inches.
Which geologic eon and era are we currently living in?
A. Proterozoic eon, Cenozoic era B. Proterozoic eon, Mesozoic era C. Phanerozoic eon, Paleozoic era D. Phanerozoic eon, Cenozoic era
Which of the following pairs of elements are the most abundant in the continental crust?
a. Calcium and oxygen b. Sodium and silicon c. Silicon and iron d. Aluminum and oxygen e. Silicon and oxygen