You measure a 20-V potential difference across a 7.0-? resistor. What is the current flowing through it?
a. 140 A
b. 2.9 A
c. 27 A
d. 13 A
e. 5.2 A
b
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Light that is shifted toward the color red due to the light passing very near a compact object is called ____________________
Fill in the blank(s) with correct word
What makes Polaris a special star?
a. It is the brightest star in the sky. b. It is always directly overhead, no matter where you are. c. It is very close to the north celestial pole on the celestial sphere. d. Its azimuth (direction) is always due north.
An up quark has charge +2/3, a down quark has charge -1/3, and a strange quark has charge -1/3. The Delta- particle is formed by a combination of three down quarks. What is its charge?
A. +1/3 B. -1 C. 0 D. 1 E. -1/3
A uniform meter stick is pivoted to rotate about a horizontal axis through the 25-cm mark on the stick. The stick is released from rest in a horizontal position. The rotational inertia of a uniform rod about an axis perpendicular to the rod and through the center of mass of the rod is given by (1/12)ML2. Determine the magnitude of the initial angular acceleration of the stick.
A. 17 rad/s2 B. 13 rad/s2 C. 15 rad/s2 D. 19 rad/s2 E. 23 rad/s2