Two speakers are placed side by side and driven by the same frequency of 0.50 kHz. If the distance from a person to one speaker is 5.0 m and the person detects little or no sound,
which of the following is a possible the distance from the person to the other speaker? The sound speed in the room is 340 m/s.
A) 7.7 m
B) 8.1 m
C) 8.4 m
D) 9.1 m
B
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Astronomers consider the Solar System's Kuiper belt extending beyond the orbit of Neptune as an example of an old debris disk
a. True b. False Indicate whether the statement is true or false
At what temperature would the root-mean-square speed (thermal speed) of oxygen molecules be 13.0 m/s? Assume that oxygen approximates an ideal gas. The mass of one O2 molecule is 5.312 × 10-26 kg. The Boltzmann constant is 1.38 × 10-23 J/K
A) 0.217 K B) 1800 K C) 5410 K D) 0.0666 K
Sun is considered to be a
A) low-mass star. B) intermediate-mass star. C) high-mass star. D) brown dwarf.
A 500-kg elevator is pulled upward with a constant force of 5500 N for a distance of 50.0 m
(a) What is the work done by the 5500-N force? (b) What is the work done by gravity? (c) What is the net work done on the elevator? What will be an ideal response?