Based on the H-R diagram shown above, what is the approximate luminosity of a main-sequence M star?
A) 10?6 times that of the Sun
B) 0.01 times that of the Sun
C) 1 times that of the Sun
D) 10 times that of the Sun
B) 0.01 times that of the Sun
You might also like to view...
In the vicinity of what frequency does an object with a temperature of 1000 K radiate the largest amount of power? (c = 3.00 × 108 m/s, Wien displacement law constant equals 2.90 × 10-3 m ? K, ? = 5.670 × 10-8 W/m2 ? K4)
A) 1.0 × 1014 Hz B) 8.0 × 1014 Hz C) 2.3 × 1014 Hz D) 6.7 × 1014 Hz E) 4.1 × 1014 Hz
A metal wire has a resistance of 14.00 ? at a temperature of 25.0°C. If the same wire has a resistance of 14.55 ? at 90.0°C, what is the resistance when its temperature is ?32.0°C?
a. 2.21 ? b. 13.5 ? c. 5.13 ? d. 39.2 ? e. 13.0 ?
A heat engine absorbs 85.6 kJ of heat each cycle and exhausts 61.8 kJ
(a) What is the efficiency of the engine? (b) How much work does it do each cycle?
The smaller portion of a solution is generally called the
a. salt. b. solute. c. molar concentrate. d. solvent.