the shortest time interval between these events?
A. Jennifer
B. Rob
C. The train passengers
A. Jennifer
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What is the maximum number of eclipses that can occur in a year?
A. 7 (four solar and three lunar) B. 4 (two solar and two lunar) C. 2 (one solar and one lunar) D. 7 (five solar and two lunar) or 7 (four solar and three lunar) E. 7 (five solar and two lunar)
Winter and summer differ in length on Mars because of its elliptical orbit
Indicate whether the statement is true or false
When a star finally runs out of hydrogen to fuse in its central core
A) it grows smaller and dimmer, becoming a brown dwarf B) it grows larger and brighter, becoming a giant or supergiant star C) it grows smaller and dimmer becoming a white dwarf D) it remains the same size but grows brighter
The tropical year is shorter than the sidereal year because Earth's
a. orbit is an ellipse rather than a true circle. b. axis precesses westward. c. orbital speed is not constant. d. axis is tilted by 23.5°.