Why might inflation have occurred at the end of the GUT era?
A) Gravity was an extremely weak force at this period in time.
B) Large amounts of matter and antimatter annihilated at this time.
C) There wasn't enough matter present to slow down the expansion at that time.
D) The universe was too small and needed to grow quickly.
E) An enormous amount of energy was released when the strong force froze out from the GUT force.
E
You might also like to view...
One mole of Strontium-90 is decaying with a half life of 28. years. After 61. years, how much Strontium is left and what is its activity?
What will be an ideal response?
The left-hand end of a glass rod is ground to a spherical surface. The glass has index of refraction 1.50. A small object 4.00 mm tall is placed in the axis of the rod, 11.0 cm to the left of the vertex of the spherical surface
The image is formed in the rod, 17.0 cm to the right of the vertex. (a) What is the magnitude of the radius of curvature of the spherical surface at the end of the rod? (b) What is the height of the image?
An object is rotating with an angular momentum of magnitude 20.0 kg?m2/s in a direction directly east. A torque of magnitude 10.0 N?m acts in a direction 30° north of east acts on the object for 5.00 s
What is the angular momentum after the torque has acted? A) 45.0 kg?m2/s, 51.3° north of east B) 68.1 kg?m2/s, 21.5° north of east C) 25.0 kg?m2/s, 51.3° north of east D) 63.3 kg?m2/s east E) 32.0 kg?m2/s, 51.3° north of east
It takes no work to hold a cheerleader in the air, as shown here. If no work is done by the cheerleaders, why do they eventually tire?
a. Because maintaining the same position for a long time is boring. b. Their bodies expend chemical energy as their muscles function; this is "hard work," but not the same kind of work that moves a mass over a distance. c. The concept of work, as it apples in physics, does not apply to any process that involves people. d. The arrangement is unstable and they can easily fall over. e. The cheerleaders at the greater height have more potential energy.