The decoupling of the strong force from the electroweak force provided energy for a rapid inflation of the Universe
a. True
b. False
Indicate whether the statement is true or false
True
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In an air-free chamber, a pebble is thrown horizontally, and at the same instant a second pebble is dropped from the same height. Compare the times of fall of the two pebbles
A) The thrown pebble hits first. B) The dropped pebble hits first. C) They hit at the same time. D) We cannot tell without knowing which pebble is heavier.
The length of a telescope is 1.60 m and it has a magnification of 60.0. What is the focal length of the eyepiece?
A) 2.62 cm B) 60.0 cm C) 100 cm D) 1.16 cm E) 96.0 cm
The full moon by definition occurs
a. for only a day. b. for 7-3/8 days. c. only for an instant. d. only once every month.
Suppose that Hubble's constant were 11 km/s/million light-years instead of 22 km/s/million light-years. How would this graph look different?
A) The data would follow a much steeper, almost vertical line. B) The data would follow a more shallow line, closer to horizontal than the current line. C) The data would follow a flat, horizontal line. D) The graph would have to show luminosity on the vertical axis, rather than velocity.