A standard candle is an object with a known luminosity
a. True
b. False
Indicate whether the statement is true or false
True
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The lowest tone to resonate in a closed pipe of length L is 200 Hz. Which of the following frequencies will not resonate in that pipe?
A) 200 Hz B) 400 Hz C) 600 Hz D) 1000 Hz E) 1400 Hz
A certain crystal has an interatomic spacing of 0.442 nm. A beam of neutrons moving with a speed of 1640 m/s is diffracted from the crystal. What is the angle of the second interference maximum?
A) 17.0° B) 21.0° C) 33.0° D) 60.0° E) 90.0°
The flattest of the ellipticals are class
A) SBO. B) SBF. C) E9. D) E7. E) E0.
For what kinds of stars are the masses of stars in the H-R diagram "orderly"? For what kinds of stars are they disorderly? In other words, could you guess the mass of a star from its location (luminosity, temperature) on the H-R diagram?
What will be an ideal response?