The cosmic microwave background radiation is due to
c.
as the universe cooled below 3000 K, the photons no longer tended to interact with matter and could pass throughout the universe.
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Stars larger than about 1.4 solar masses must lose mass in order to become white dwarfs
a. True b. False Indicate whether the statement is true or false
The self-inductance of a solenoid increases under which of the following conditions?
a. Only the solenoid length is increased. b. Only the cross sectional area is decreased. c. Only the number of coils per unit length is decreased. d. Only the number of coils is increased.
Which organisms are multicellular eukaryotes, with the majority being photosynthetic producers?
a. plants b. animals c. fungi d. bacteria e. archaea
Stars are evenly distributed throughout the Universe.
a. true b. false