The star named Circini has the spectral type and luminosity class of O 8.5 V. Based on this information, which of the following are true? I. Circini has a surface temperature less than the sun. II. Circini has a diameter that is greater than that of the sun. III. Circini is more luminous than the sun. IV. Circini is located near the upper left hand corner in the HR diagram
a. I & II
b. II & IV
c. II, III, & IV
d. I, II, & III
e. I, II, III, & IV
C
You might also like to view...
A 0.40 H inductor has a current that rises from zero to 3.0 A in 6.0 s. What is the average power required to accomplish this?
A. 15 W B. 9.0 W C. 1.5 W D. 0.60 W E. 0.30 W
What is the correct order of densities from least to most?
a. supergiant, main sequence, white dwarf b. main sequence, white dwarf, supergiant c. white dwarf, main sequence, giant d. main sequence, giant, supergiant
Time Dilation: An unstable particle is moving at a speed of 1.6 × 108 m/s relative to a laboratory. Its lifetime is measured by a stationary observer in the laboratory to be 6.8 × 10-6 s. What is the lifetime of the particle as measured in the rest frame of the particle? (c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
If you double the length of each side of a cube, its surface area increases by what factor?
A. 2 B. 4 C. 6 D. 8