If the air temperature decreases, how does the resonant frequency in a pipe closed at one end change?
a. It increases.
b. It decreases.
c. It doesn't change since one end of the pipe is closed. d. It doesn't change because resonance is a pressure phenomenon.
B
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A grating with 396 lines/mm is illuminated with light of wavelength 343 nm. What is the angular separation between the two second-order bright fringes?
A) 31.5° B) 15.8° C) 32.9°
Which two resistors are in parallel with each other?
a.
R and R4
b.
R2 and R3
c.
R2 and R4
d.
R and R1
If 5.0 × 10^21 electrons pass through a 20-? resistor in 10 min, what is the potential difference across the resistor?
a. 21 V b. 32 V c. 27 V d. 37 V e. 54 V
You discover that a nearby star, very similar to the Sun, has a velocity curve that has a period of 6 months, induced by the orbit of a planet. You infer that
A) the planet's orbit radius is greater than 1 AU. B) the planet's orbit radius is less than 1 AU. C) the planet's orbit radius cannot be determined based on the information provided. D) the planet's orbit radius is about 1 AU.