9/ The star Betelgeuse has a wavelength of maximum
emission of 923.5 nm, whereas the star...
9/ The star Betelgeuse has a wavelength of maximum
emission of 923.5 nm, whereas the star Bellatrix has a wavelength
of maximum emission of 131.8 nm. Which star is colder
A/ more info
B/ Bellatrix
C/ Betelgeuse
D/ same temperature
10/ Which of the following correctly lists the spectral
sequence of stars in order of decreasing surface
temperature?
A/ O,B,A,F,G,K,M
B/ M,K,G,F,A,B,O
C/ O,M,K,G,F,B,A
D/ A,B,F,G,K,M,O
11/ How is a star assigned its spectral
type?
A/ The star’s spectrum is...
A certain tube, open at both ends, resonates at a frequency of
286 Hz when the...
A certain tube, open at both ends, resonates at a frequency of
286 Hz when the air temperature is 35.0OC. When one end of the tube
is closed and the air temperature is 15.0OC, it resonates at a
frequency of 449 Hz. Find the length of the tube.
1. If a wind instrument, such as a tuba, has a fundamental
frequency of 30.1 Hz,...
1. If a wind instrument, such as a tuba, has a fundamental
frequency of 30.1 Hz, what is its first overtone? It is closed at
one end and the speed of sound is 334 m/s.
2. Find the length of an organ pipe closed at one end that
produces a first overtone frequency of 276 Hz when air temperature
is 21.3ºC .
3. A “showy” custom-built car has two brass horns that are
supposed to produce the same frequency but...