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

Physics & Space Science

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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

Physics & Space Science

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.

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science