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?
The masses of main-sequence stars decrease systematically from upper left to lower right in the H-R diagram, but the masses of giants and supergiants are not arranged in any ordered pattern.
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A hornet circles around a pop can at increasing speed while flying in a path with a 12-cm diameter. We can conclude that the hornet's wings must push on the air with force components that are
A. straight down. B. down and inwards. C. down and outwards. D. down and backwards. E. down, backwards and outwards.
In terms of composition and density, the atmosphere of Titan is closer to our own than any other place we have found in the solar system
Indicate whether the statement is true or false
If, at the instant of fission, the Ba and Kr fragments are spherical and just barely in contact,
what is the electrostatic potential energy of these two fragments? (1 eV = 1.60 × 10-19 J, e = 1.60 × 10-19 C, 1/4??0 = 8.99 × 109 N ? m2/C2 ) A) 270 MeV B) 250 MeV C) 230 MeV D) 260 MeV E) 240 MeV
What happens to the cyclotron frequency of a charged particle if the radius of its path doubles?
A) It quadruples. B) It triples. C) It doubles. D) It halves. E) It does not change.