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
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.
What is the quark structure of an electron?
a. uud b. udd c. uuu d. ddd e. the question does not make sense