Density is defined as
A) size divided by weight.
B) mass times weight.
C) weight per square inch.
D) weight divided by the planet's radius.
E) mass per unit volume.
E
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Fissioning a lead nucleus would yield a net
A) absorption of energy. B) release of energy. C) neither of these
What is the wavelength of the line in the hydrogen spectrum that is comprised of transitions from the n = 5 to the n = 3 levels?
a. 1880 nm c. 2250 nm b. 1290 nm d. 1920 nm
Which of the following best represents the energy transformations occurring in a photovoltaic cell?
A) electric ? radiant B) thermal ? electric C) thermal ? radiant ? electric D) radiant ? electric E) radiant ? thermal ? electric
You are riding in a spaceship that has no windows, radios, or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. How can you do this?
A) You can determine if the ship is moving by determining the apparent velocity of light in the spaceship. B) You can determine if the ship is moving by checking your precision time piece. If it's running slow, the ship is moving. C) You can determine if the ship is moving by lying down and measuring your height. If you are shorter than usual, the ship is moving. D) You should give up because you have taken on an impossible task!