Relative to the age of the universe, how old is our solar system?
A) It is about 1% as old as the universe.
B) It is about one-third the age of the universe.
C) It is nearly the same age as the universe.
D) It is between about 5% and 10% as old as the universe.
B
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The elliptical galaxies have compositions and shapes like the ________ of the Milky Way
Fill in the blank(s) with correct word
A physicist claims that she has found a new particle with a mass 200 000 times the mass of the proton (1.67 × 10^?27 kg) and a charge of 3.20 × 10^?19 C. If she is correct, such a particle traveling in a circle in a uniform 5.00 T magnetic field at a velocity of 2 500 m/s will have a radius of
a. 0.261 m. b. 0.522 m. c. 1.04 m. d. 3.27 m. e. 3.13 × 10^26 m.
The photons coming from an excited gas create a(n) ____ spectrum
a. absorption b. emission c. continuous d. Doppler e. ionization
Red giant stars are I. more luminous than the Sun. II. larger in diameter than the Sun. III. cooler than B stars. IV. located above the main-sequence stars in the H-R diagram
a. I & II b. II & IV c. I, II, & IV d. II, III, & IV e. I, II, III, & IV