The distance between successive nodes for a standing wave pattern is ________ the wavelength (give multiple or fraction).
Fill in the blank(s) with the appropriate word(s).
1/2
half
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According to the Big Bang theory, ordinary matter did not exist in the first microsecond after the beginning. All the matter in the universe was a sea of ________.
Fill in the blank(s) with the appropriate word(s).
Two large equipotent surfaces are flat and parallel and separated by a relatively small distance compared to their size. One surface is at 25 V and the other is at 33 V. The surfaces are 1.25 cm apart. What is the direction of the electric field midway between the surfaces?
A. the field is parallel to the surfaces B. the field is perpendicular to the surfaces going from the 25 V surface to the 33 V surface C. the field is perpendicular to the surfaces going from the 33 V surface to the 25 V surface D. the field makes clockwise circles viewed from the 33 V surface E. the field makes clockwise circles viewed from the 25 V surface
Harlow Shapley concluded that the Sun was not in the center of the Milky Way Galaxy by
A) looking at the shape of the "milky band" across the sky. B) mapping the distribution of stars in the galaxy. C) mapping the distribution of globular clusters in the galaxy. D) mapping the distribution of gas clouds in the spiral arms. E) looking at other nearby spiral galaxies.
Through what potential difference would an electron initially at rest need to be accelerated to have its total energy be five times its rest energy? (me = 9.11 × 10^–31 kg, c = 3.00 × 10^8 m/s, and qe = 1.6 × 10^?19 C)
a. 1.6E–19 V b. 2.6E+6 V c. 2.0E+6 V d. 210 V e. 6.8E–3 V