What characteristic of neutrinos other than their flavor is essential to the theory of neutron oscillation?
a. Their three different wavelengths.
b. Their three different frequencies.
c. Their three different electric charges (+, 0, and -).
d. Their three different masses.
e. Their three different colors.
d
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Your weight is equal to mg when you are
A) firmly supported on a horizontal surface and in equilibrium. B) in Earth's gravitational field. C) anywhere except in Earth's orbit. D) all of the above
A center or an edge of the Universe would be a special place, contradicting the cosmological principle
a. True b. False Indicate whether the statement is true or false
A force of 3.8N directed along the positive x-axis combines with a second force directed along the positive y-axis to produce a total force vector of magnitude 6.1N. What is the magnitude of the second vector?
A. 2.7N B. 9.5N C. 23.5N D. 4.8N E. Not enough information is given.
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.