On a Hertzsprung-Russell diagram, where on the main sequence would you find stars that have the greatest mass?
A) upper right B) lower right C) upper left D) lower left
C
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Interstellar gas clouds may collapse to form stars if they
a. have very high temperatures. b. encounter a shock wave. c. rotate rapidly. d. are located near main sequence spectral type K and M stars. e. all of the above.
A gas expands from an initial volume of 30.0 L to a final volume of 65.0 L at a constant pressure of 110 kPa. How much work is done by the gas?
A) 3.85 kJ B) 10.4 kJ C) 3850 kJ D) 10.4 MJ E) 3.85 MJ
A car starts from rest and reaches 20 m/s in 5 seconds. The average acceleration of the car is
A. 1.0 m/s2. B. zero m/s2. C. 4.0 m/s2. D. 10.0 m/s2. E. 2.0 m/s2.
Index of Refraction: Light having a wavelength in vacuum of 600 nm enters a liquid of refractive index 2.0. In this liquid, what is the wavelength of the light? (c = 3.0 × 108 m/s)
A. 1200 nm B. 600 nm C. 300 nm D. 150 nm E. 200 nm