The Hertzsprung-Russell diagram can be labeled many different ways. Which coordinates CANNOT be used on an H-R diagram?
a. luminosity versus spectral type
b. luminosity versus temperature
c. radius versus temperature
d. absolute magnitude versus temperature
e. luminosity versus color
c
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A block is on a frictionless horizontal table, on earth. This block accelerates at 1.9 m/ when a horizontal force is applied to it. The block and table are then set up on the moon where the acceleration due to gravity is 1.62 m/s2
What is the weight of the block on the moon? A) 77 N B) 67 N C) 58 N D) 48 N E) 39 N
Why was Voyager 2 an extremely efficient and productive probe?
What will be an ideal response?
The fact that more radioactive particles are spewed from coal-fired power plants than nuclear fission reactors is evidence that
A) coal is more radioactive than uranium. B) coal-fired plants have less shielding. C) coal-fired plants are more numerous. D) all of the above E) none of the above
Atoms are held together by
A) the electrostatic force of attraction between the protons in the nucleus and the surrounding electrons B) the combined electrostatic force of attraction between the protons and neutrons in the nucleus and the surrounding electrons C) the force of gravitational attraction between the protons in the nucleus and the surrounding electrons D) the electrostatic force of attraction between the neutrons in the nucleus and the surrounding electrons