Suppose that inflation did not occur. In that case, the fact that the cosmic microwave background has the same temperature in opposite directions of the sky would be considered
A) surprising, because those locations would never have been close enough to have any light or matter exchanged between them.
B) surprising, because we would not expect those locations to have the same age.
C) natural, because everything in the universe is naturally expected to have the same temperature.
D) natural, because quantum fluctuations in the early universe would have ensured that the whole universe had precisely the same temperature.
A) surprising, because those locations would never have been close enough to have any light or matter exchanged between them.
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Increasing the diameter of a telescope I. increases its light gathering power. II. increases its resolving power. III. increases it magnifying power. IV. increases its chromatic aberration
a. I, II, III, & IV b. I, II, & III c. I, II, & IV d. III & IV e. I & II
What is the next harmonic frequency over the fundamental for an organ pipe 1.50 m in length, closed at one end? The speed of sound in air is 340 m/s
a. 227 Hz c. 113 Hz b. 170 Hz d. 56.7 Hz
Magnetic Field of a Long Wire: Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 20 cm. At what point between the two wires do they produce the same strength magnetic field?
A. 4.0 cm from the 20 A wire B. 8.0 cm from the 20 A wire C. 12 cm from the 20 A wire D. 16 cm from the 20 A wire E. 18 cm from the 20 A wire
A spiral galaxy is the result of the collision and merger of galaxies that leave moderate to large amounts of gas in the system.
Answer the following statement true (T) or false (F)