There is observational evidence that supports the theoretical conditions of the universe. The farthest back in the history of the universe this evidence goes is:
A) the moment of the Big Bang.
B) the end of the Planck epoch.
C) the beginning of GUT.
D) the end of the Radiation Era.
E) the Recombination Epoch.
E
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The book "De Revolutionibus Orbium Coelestium"
a. describes how Galileo's observations and Kepler's calculations proved the Copernican theory. b. describes the construction of Galileo's telescope and his observations. c. is a dialog written to convince the general public of the merits of the Copernican theory. d. first described the Copernican theory. e. describes the Tychonian theory.
Magnifying Glass With the Image at Infinity: A person having a near point of 25 cm uses a magnifying glass with a focal length of 10 cm. What is the angular magnification of the glass for that person when her eyes are focused at infinity?
A. 1.5 B. 2.5 C. 3.5 D. 4.5
A potential difference of 12.4 V is placed across a 4.1
resistor. What is the current in the resistor?
A. 51 A B. 3.0 A C. 0.33 A D. 16A E. 8.3 A
One light-minute is the distance that light travels in one minute. How far is this, in kilometers? (Recall that the speed of light is 300,000 km/s.)
A) 300,000 km B) 18 million km C) 100 million km D) 1.08 billion km E) 9.46 trillion km