Weakly interacting particles (WIMPs) interact with other particles using gravity and the weak nuclear force. They cannot emit or absorb light. Therefore, how does the behavior of hydrogen and helium gas differ from that of WIMPs?
A) Hydrogen and helium gas affects particles that we can see.
B) Hydrogen and helium gas interacts with other forms of matter gravitationally.
C) Hydrogen and helium gas can cool by radiating energy.
C
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Planetary systems discovered around other stars
A) all have exactly the same layout as the planets in our own solar system B) all have completely different layouts as the planets in our own solar system C) exhibit a range of different layouts, some being very similar to our solar system while others being very different D) all have very similar but not identical layout to our solar system
Explain how the structure of the atom creates binding energy, and what limits there are on the amount of binding energy an electron can have
What will be an ideal response?
Which planet is orbited by the four "Galilean moons" known individually as Io, Europa, Ganymede, and Callisto?
A) Saturn B) Uranus C) Mars D) Jupiter E) Neptune
Which law of thermodynamics states that no system can reach absolute zero?
A) First law B) Second law C) Third law D) all of the above