___________ galaxies contain large clouds of gas and dust, both young and old stars, but have no obvious spiral arms or nucleus
a. Irregular
b. S0
c. E7
d. Sa
e. E0
a
You might also like to view...
Double-Slit Interference: In a double-slit experiment, the slit separation is 1.75 mm, and two coherent wavelengths of light, 425 nm and 510 nm, illuminate the slits. At what angle from the centerline on either side of the central maximum will a bright fringe from one pattern first coincide with a bright fringe from the other pattern?
Fill in the blank(s) with the appropriate word(s).
The Sun appears to travel daily in the sky
a. one degree in 4 minutes. b. 7 ° in one hour. c. 360° in 12 hours. d. 23.5° in one year.
As an object moves from point A to point B only two forces act on it: one force is nonconservative and does ?30 J of work, the other force is conservative and does +50 J of work. Between A and B,
a. the kinetic energy of object increases, mechanical energy decreases. b. the kinetic energy of object decreases, mechanical energy decreases. c. the kinetic energy of object decreases, mechanical energy increases. d. the kinetic energy of object increases, mechanical energy increases. e. None of the above.
The ____________________ of a star can be determined from its color
Fill in the blank(s) with correct word