The__________is a graph that separates the effects of temperature and surface area on stellar luminosities and enables astronomers to sort the stars according to their diameters
A) Herzberg diagram
B) Hertzsprung-Russell diagram
C) Ptolemaic geocentric
D) Maxam-model
B
You might also like to view...
Radio telescopes image a universe much ________ in temperature than with visible light
Fill in the blank(s) with correct word
What is the quark structure of an electron?
a. uud b. udd c. uuu d. ddd e. the question does not make sense
Which of the following can be classified as "heat engines":
A) geothermal power plant B) wind turbines C) hydroelectric power plant D) All of the above. E) None of the above.
A car travels in a flat circle of radius R. At a certain instant the velocity of the car is 20 m/s north, and the total acceleration of the car is 2.5 m/s2 37° south of west. Which of the following is correct?
a. R = 0.40 km, and the car's speed is decreasing. b. R = 0.20 km, and the car's speed is decreasing. c. R = 0.20 km, and the car's speed is increasing. d. R = 0.16 km, and the car's speed is increasing. e. R = 0.16 km, and the car's speed is decreasing.