What does Hubble's law imply about the history of the universe?
A) The universe must be infinitely old and huge.
B) The universe had a beginning and has expanded since, giving it a finite age.
C) The Milky Way lies exactly at the center of this expansion.
D) The redshifts will lengthen with time due to dark energy.
E) The redshifts will turn to blue shifts as universe contraction follows the expansion.
B
You might also like to view...
Second closest star to Earth
A. Solar Eclipses |
B. Alpha Centauri |
C. Proxima Centauri |
D. Lunar Eclipses |
E. Nicolas Copernicus |
F. Claudius Ptolemy |
The visible parts of galaxies contribute about 10 percent of the critical density of the universe
Indicate whether the statement is true or false
A planar loop consisting of four turns of wire, each of which encloses 200 cm2, is oriented perpendicularly to a magnetic field that increases uniformly in magnitude from 10 mT to 25 mT in a time of 5.0 ms. What is the resulting induced current in the coil if the resistance of the coil is 5.0 ??
a. 60 mA b. 12 mA c. 0.24 mA d. 48 mA e. 6.0 mA
A pendulum is made by letting a 2.0-kg object swing at the end of a string that has a length of 1.5 m. The maximum angle the string makes with the vertical as the pendulum swings is 30°. What is the speed of the object at the lowest point in its trajectory?
a. 2.0 m/s b. 2.2 m/s c. 2.5 m/s d. 2.7 m/s e. 3.1 m/s