In pair production in the Big Bang, which statement is FALSE?
A) The heaviest particles and their antiparticles formed first, from collisions of the highest energy gamma rays.
B) Matter is frozen energy, according to Einstein's E = mc2.
C) Every electron should have a proton formed at the same time with it.
D) Even neutrons have their antineutrons, although both lack any charge.
E) In addition to familiar neutrons and protons, many other exotic particle and antiparticle pairs formed, but decayed back to radiation.
C
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The four Galilean moons around Jupiter are
A) all made of rock. B) all made of ice. C) a mixture of rock and ice. D) very similar to asteroids. E) hydrogen and helium gas.
An important use of x-ray diffraction was:
a. the observation of Compton scattering. b. determining the structure of the DNA molecule. c. production of positrons. d. observation of the photoelectric effect.
An electron-volt is
A) the charge of one electron. B) the energy of one electron. C) the energy jump between the first and second energy levels of hydrogen. D) an amount of energy much smaller than a joule. E) an amount of energy much larger than a joule.
Why does Mars appear red from Earth's surface?
What will be an ideal response?