The most striking example of solar variability was:
A) the Dust Bowl drought of the 1930s.
B) the Maunder Minimum from 1645-1715.
C) the Sporer Minimum that doomed the Anasazi.
D) the fall of Rome.
E) Joseph's seven lean years in the Old Testament.
B
You might also like to view...
Based on the given right ascensions and declinations, which of the following stars lies closest to the celestial equator on the celestial sphere?
A) Sirius: RA = 6hr 45m, dec = -16°42' B) Canopus: RA = 6hr 24m, dec = -52°41' C) Alpha Centauri: RA = 14hr 40m, dec = -60°50' D) Arcturus: RA = 14hr 16m, dec = +19°11' E) Vega: RA = 18hr 37m, dec = +38°47'
When an oxygen-19 nucleus undergoes beta decay, the nucleus formed is that of
a. nitrogen-18. b. oxygen-18. c. fluorine-19. d. carbon-14.
In general, Globular clusters are ________ and ________ than open clusters
Fill in the blank(s) with correct word
A 500-kg elevator is pulled upward by a cable that exerts a constant force of 5500 N on the elevator for a distance of 50.0 m. The elevator is the system
(a) What is the work done by the 5500-N force? (b) What is the work done by the gravitational force? (c) What is the net work done on the elevator?