Relate the inflationary theory to the GUTs
What will be an ideal response?
The "superforce" breaks up into the strong nuclear force and the electro-weak force at about 10-35 seconds produced a huge jump in the scale of the universe, by about times, solving the horizon and flatness problems in the process.
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The energy per unit charge supplied by a battery is its __________
Fill in the blank(s) with correct word
What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state n = 4 jumps to the final state n = 2? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 243 nm B) 486 nm C) 556 nm D) 312 nm E) 609 nm
Ptolemy was important in the history of astronomy because he ________
A) was the first to believe that all orbits are perfect circles B) was the first to create a model of the solar system that placed the Sun rather than the Earth at the center C) developed the first scientific model of the universe D) developed a model of the solar system that made sufficiently accurate predictions of planetary positions to remain in use for many centuries
A tractor T is pulling two trailers, 
and 
with a constant acceleration. T has a mass of 200 kg, 
has a mass of 100 kg, and 
has a mass of 150 kg. If the forward acceleration is 0.60 
then the horizontal force on the tractor due to the ground is
A. 270 N backward.
B. 270 N forward.
C. 150 N backward.
D. 150 N forward.
E. 90 N forward.