The flatness problem and horizon problem
a. are solved if there was a sudden inflation of the Universe at time before recombination occurred.
b. show that the Universe can be described as static and unchanging.
c. show that dark matter must be a small fraction of the total mass of the Universe.
d. imply that the Universe was once much colder than it is now.
e. imply that the inflationary theory is incorrect.
a
You might also like to view...
Standing Sound Waves: An organ pipe that is 1.75 m long and open at both ends produces sound of frequency 303 Hz when resonating in its second overtone. What is the speed of sound in the room?
Fill in the blank(s) with the appropriate word(s).
In an AC circuit operating at a frequency where the phase angle with respect to the current is 30°, what happens to the phase angle if the capacitance of the circuit is increased?
a. It increases. b. It decreases. c. nothing d. It decreases and can become zero.
An amount of an ideal gas is taken around the process shown. Which of the following statements about the internal energy of the states is true?
Two blocks, joined by a string, have masses of 6.0 and 9.0 kg. They rest on a frictionless, horizontal surface. A second string, attached only to the 6.0-kg block, has horizontal force = 45 N applied to it. Both blocks accelerate. Find the tension in the string between the blocks
a. 18 N c. 12 N b. 27 N d. 9.0 N