Which types of galaxies have a clearly defined disk component?
A) spirals only
B) ellipticals only
C) irregulars only
D) both spirals and ellipticals
A) spirals only
You might also like to view...
The intensity of solar radiation near the earth is 1.4 kW/m2. What force is exerted by solar radiation impinging normally on a 5.0 m2 perfectly reflecting panel of an artificial satellite orbiting the earth?
(c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) A) 14 kN B) 94 µN C) 140 µN D) 23 µN E) 47 µN
The heat capacity at constant volume and the heat capacity at constant pressure have different values because:
A. heat increases the temperature at constant volume but not at constant pressure B. heat increases the temperature at constant pressure but not at constant volume C. the system does work at constant volume but not at constant pressure D. the system does work at constant pressure but not at constant volume E. the system does more work at constant volume than at constant pressure
Shapley found the Sun is located about half way out the disc from the center of the disk of the Galaxy
Indicate whether the statement is true or false
An automobile travels due north with a speed of 77 km/h that is decreasing. All forces considered, the unbalanced force acting on the auto is
a. zero. b. southward. c. northward. d. downward. e. upward.