In any process, the total ________ in all parts of the universe increases or remains constant.
Fill in the blank(s) with the appropriate word(s).
entropy
disorder
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By convention, the direction of current in a circuit is
A) from the positive terminal of a source to the negative terminal. B) the direction in which positive charge flows. C) both of these D) neither of these
Astronauts in a space shuttle that orbits the Earth are in a state of "free fall" that makes them appear to be weightless. If an astronaut brings a helium balloon to a pressurized room of a space shuttle while it is in orbit, what would the helium balloon do?
1.It would float to the top of the cabin. 2.It would sink slowly to the bottom of the cabin. 3.It would remain wherever it is placed. 4.It would remain at whatever height it is placed, but it would move horizontally to one side of the cabin.
Based on the H-R diagram shown above, what is the spectral type of a main-sequence star with a luminosity 100 times greater than that of the Sun?
A) O B) A C) G D) M
A glass block, for which n = 1.52, has a blemish located 3.3 cm from one surface. At what distance from that surface does the image of the blemish appear to the outside observer?
a. 5.0 cm b. 2.2 cm c. 4.1 cm d. 2.7 cm e. 3.3 cm