What does E = mc2 say--that all energy has mass, or that all mass has energy?
A) All mass has energy. B) It says neither of these.
C) All energy has mass. D) It says both of these.
D
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What are Kepler's three laws?
What will be an ideal response?
We can see each other in the classroom right now because we
A) emit visible light. B) emit thermal radiation. C) emit infrared light. D) reflect visible light. E) reflect infrared light.
When sunlight from air enters water, light that refracts most is
A) red. B) orange. C) green. D) violet. E) all refract the same amount
If cooking is done using an aluminum pan over an electric burner, which of the following will not promote the rate of heat flow from burner to food?
a. increase pan bottom thickness c. increase burner temperature b. increase pan bottom area d. decrease height of pan sides