An open pipe of length L is resonating at its fundamental frequency. Which statement is correct?
A) The wavelength is 2L and there is a displacement node at the pipe's midpoint.
B) The wavelength is 2L and there is a displacement antinode at the pipe's midpoint.
C) The wavelength is L and there is a displacement node at the pipe's midpoint.
D) The wavelength is L and there is a displacement antinode at the pipe's midpoint.
E) The wavelength is 3L/2 and there are two displacement antinodes located inside the pipe.
A
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When an unstable nucleus decays by emitting an alpha particle, the atomic number of the nucleus
A) increases by 4. B) increases by 2. C) decreases by 2. D) decreases by 4. E) remains unchanged.
The meson having which of the following quark contents has electric charge -e?
a. 
b. 
c. 
d. 
e. 
A 12 ohm resistor and a 24 ohm resistor are connected in parallel across a 6.0 V battery. The correct statement from the following is
A. the larger current is in the larger resistor. B. the current is the same in each resistor. C. the voltage difference between the ends of each resistor is the same. D. the power dissipated is the same in each resistor.
Suppose you find a meteorite made almost entirely of metal. According to current science, which of the following statements must be true?
A) Your meteorite is a fragment of an object from the Kuiper belt. B) Your meteorite is a fragment from the core of a large asteroid that shattered in a collision. C) Your meteorite was blasted off the surface of Mars by an impact. D) Radiometric dating will show the age of your meteorite to date to the formation of our solar system.