What is the power of the combined lenses with individual powers of 8.0 diopters and 4.0 diopters?
A) 32 diopters
B) 24 diopters
C) 2.0 diopters
D) 4.0 diopters
E) 12 diopters
E
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If gold were always sold by weight, could you make money buying gold at one altitude above the ground and selling it at a different altitude?
A) Yes, you could make money by buying gold at a lower altitude and selling it at a higher altitude. B) Yes, you could make money by buying it at either a lower or higher altitude, and then selling it at the other altitude. C) Yes, you could make money by buying gold at a higher altitude and selling it at a lower altitude. D) No, you couldn't make any money this way because the mass of the gold would be the same at both altitudes. E) No, you couldn't make any money this way because the weight of the gold would be the same at both altitudes.
A current loop is placed in a magnetic field which is coming out of the board, as indicated. Will the loop tend to rotate clockwise, counterclockwise, or not at all about a vertical axis?
A. clockwise B. counter-clockwise C. not at all
Size of the Nucleus: The radius R of a nucleus of mass number A is given by R = R0 A1/3, where R0 = 1.2 × 10-15 m, calculate the density of a nucleus that has contains 57 protons and 82 neutrons. The mass of a nucleon (proton or neutron) is 1.67 × 10-27 kg.
Fill in the blank(s) with the appropriate word(s).
What do we mean by time dilation in relativity?
A) It is the idea that time really runs slower in reference frames moving relative to you. B) It is the idea that time seems to run slower in reference frames moving relative to you, but time really is the same for everyone. C) It is the idea that relativity makes time dilate, or expand, for people who study it. D) It is a hallucinogenic effect experienced by people who take too much of something.