According to the Big Bang theory, why do we live in a universe that is made of matter rather than antimatter?
A) Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter.
B) GUT theories predict that under the conditions that prevailed in the early universe, the normal laws of physics would have been suspended so that only matter particles were created, and no particles of antimatter.
C) The fact that we live in a universe made of matter is not surprising because antimatter has never been shown to exist for real.
D) During the first 0.001 second after the Big Bang, particles and antiparticles were made in almost but not perfectly equal numbers. Everything annihilated except the very slight excess of matter particles.
D) During the first 0.001 second after the Big Bang, particles and antiparticles were made in almost but not perfectly equal numbers. Everything annihilated except the very slight excess of matter particles.
You might also like to view...
What observations demonstrate the existence of an interstellar medium?
What will be an ideal response?
Magnetic Field of a Long Wire: How much current must flow through a long straight wire for the magnetic field strength to be 1.0 mT at 1.0 cm from a wire? (?0 = 4? × 10-7 T ? m/A)
A. 50 mA B. 9.2 A C. 16 A D. 50 A E. 5.0 mA
From the fact that virtually every galaxy is moving away from us and more distant galaxies are moving away from us at a faster rate than closer ones, we conclude that
A) the Milky Way Galaxy is expanding. B) we are located at the center of the universe. C) even nearby galaxies will eventually be moving faster than the speed of light. D) the universe is expanding. E) the universe is shrinking.
A person makes ice tea by adding ice to 1.8 kg of hot tea, initially at 80°C
How many kilograms of ice, initially at 0.00°C, are required to bring the mixture to 10°C? The heat of fusion of ice is 334 kJ/kg, and we can assume that tea has essentially the same thermal properties as water, so its specific heat is 4190 J/(kg?K). A) 1.0 kg B) 1.2 kg C) 1.4 kg D) 1.5 kg E) 1.7 kg