Which of the following best describes the Milky Way Galaxy?
A) a spiral galaxy with a disk about 100,000 light-years in diameter
B) a spiral galaxy with a disk about 1 billion kilometers in diameter
C) a spiral galaxy with a disk about 1000 light-years in diameter
D) a spherically shaped galaxy that is about 4 light-years in diameter
E) a spherically shaped galaxy that is about 100,000 light-years in diameter
A) a spiral galaxy with a disk about 100,000 light-years in diameter
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Part of the current atmosphere of Earth is believed to be
a. the remnants of the original hydrogen and helium gas from the solar nebula attracted by the protoplanet. b. the result of the melting and vaporizing of the glaciers from the last ice age. c. composed primarily of hydrogen and helium. d. composed of gases that were outgassed from the heated rocks sometime after the planet formed. e. the result of a collision between the sun and another star.
Platinum melts at 3215°F. What is the corresponding temperature in the Kelvin scale?
A) 2041 K B) 2135 K C) 2207 K D) 2296 K E) 3215 K
A concave mirror is also known as a diverging mirror
Indicate whether the statement is true or false
The San Andreas fault is still active today as the northwest moving
A) North American Plate grinds against the southwest moving Pacific Plate. B) Pacific Plate grinds against the southwest moving North American Plate.