Why does Mars appear red from Earth's surface?
What will be an ideal response?
The soil on Mars contains large amounts of oxidized iron (rust). So the color of the planet truly is red.
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What is an asterism?
a. A legend or folklore association to a grouping of stars b. Less formally defined group of stars outside the official 88 constellations c. The council of astronomers who defined the 88 constellations d. The northern pivot point of the celestial sphere e. Constellations close enough to a celestial pole that they do not appear to rise from the east and set in the west
Three pith balls supported by insulating threads hang from a support. We know that ball X is positively charged. When ball X is brought near balls Y and Z without touching them, it attracts Y and repels Z. Since pith is an insulating material, we can conclude that
a. Y has a negative charge. b. Z has a negative charge. c. Y has a positive charge. d. Z has a positive charge. e. Z is neutral (has no net charge).
If the kinetic energy of a proton is 80% of its total energy, what is the speed of the proton?
A) 0.02c B) 1.0c C) 0.87c D) 0.98c
If you toss 100 coins simultaneously, there are many different ways for half the coins to land with half having heads facing up and half with tails facing up. How many ways are there to have all heads, and what does this imply?
a. As many ways as there are to have half heads and half tails, and it implies that both events are just as likely. b. As many ways as there are to have half heads and half tails, and it implies that half heads and half tails is a much more likely outcome. c. Two ways only, and this implies that all heads is unlikely. d. One way only, and this implies that it is much less likely to have all heads than to have half heads and half tails. e. One way only, implying that it is just as likely as for half heads and half tails.