Which of the following types of galaxies are reddest in color?
A) spirals
B) ellipticals
C) lenticulars
D) irregulars
B
Physics & Space Science
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The Southern hemisphere of Mars is at
A) an average elevation and is covered with impact craters B) a higher than average elevation and is relatively smooth C) a higher than average elevation and is covered with impact craters D) a lower than average elevation and is relatively smooth
Physics & Space Science
Halley's comet orbits the Sun approximately every 76 years, therefore it is a short-period comet.
Answer the following statement true (T) or false (F)
Physics & Space Science
An object that has zero resistance is a
a. semiconductor. b. superconductor. c. diode. d. transistor. e. positive ion.
Physics & Space Science
The proton is slightly more massive than the neutron
Indicate whether the statement is true or false
Physics & Space Science