A stringed instrument has a node at each end of the string, while a wind instrument:
a. has an antinode at the open end and a node at the closed end.
b. has a node at the open end and an antinode at the closed end.
c. has antinodes at both ends of the column of air.
d. has no nodes or antinodes at all.
e. has a node at each end of the column of air, similar to a stringed instrument.
a
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The change in entropy of 20.0 moles of ideal monatomic constant volume gas as it changes from an initial temperature 300 K to its final temperature is 200 J/K. What is the final temperature of the gas?
A) 669 K B) 562 K C) 427 K D) 187 K E) 345 K
A star has a parallax of .05". Its distance is
A) 20 parsecs. B) 200 parsecs. C) 66 parsecs. D) 5 light-years. E) 660 light-years.
A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 cos (pt). The magnitude of the acceleration (in m/s2) of the body at t = 1.0 s is approximately
a. 3.5 b. 49 c. 14 d. 43 e. 4.3
In a(n) _____________reaction, two solid phases ? and ? react to form one solid phase ?.
Fill in the blank(s) with the appropriate word(s).