Which of the following limit the ultimate world population?
a. The size of Earth
b. The energy coming to Earth from the Sun
c. The amount of land mass
d. The amount of food available
e. All of the above are limits to world population.
E
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In the context of the excitation of atoms, jumps of electrons from one orbit to another are sometimes called__________
A) magnetic jumps B) transitional jumps C) filtered jumps D) quantum jumps
Ionization from the ____________________ star in the Orion nebula makes it ____________________ brightly
Fill in the blank(s) with correct word
The length of a certain wire is kept same while its radius is doubled. What is the new resistivity of this wire?
A) It is increased by a factor of 2. B) It is increased by a factor of 4. C) It is reduced by a factor of 2. D) It is reduced by a factor of 4. E) It does not change.
Which of the beams is due to an energetic light wave?
A) a B) b C) c D) a and c E) all of the above