During its early history, matter dominated the Universe
a. True
b. False
Indicate whether the statement is true or false
False
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A total lunar eclipse is visible only from the path of totality
a. True b. False Indicate whether the statement is true or false
The first stars to form in our galaxy
a. had circular orbits. b. had highly elongated elliptical orbits. c. were population I stars. d. all had orbits in the same plane. e. formed the galactic clusters we see today.
A very long straight wire carrying 2.0 A lies along the x-axis. A second very long parallel wire carrying 3.0 A in the same direction is positioned parallel to the x-axis and passes through the point (0, 1.0 m)
What is the magnitude of the magnetic field at the point (0, 0, 1.0 m)?
An electron has a speed of 0.643c. Through what potential difference would the electron need to be accelerated (starting from rest) in order to reach this speed? (c = 3.00 × 108 m/s, e = 1.60 × 10-19 C, mel = 9.11 × 10-31 kg)
A) 160 kV B) 200 kV C) 130 kV D) 180 kV