The result of a particle meeting its antiparticle will most likely be
A. the creation of a "black hole."
B. the release of quarks contained in each particle.
C. the creation of a new particle with twice the mass of the original particles.
D. annihilation of the two particles and the release of photons.
Answer: D
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Suppose it is a crescent moon, as seen from Earth. How would Earth appear to someone on the Moon at this time?
A) The side of Earth facing the Moon is completely bright. B) The illumination of the Earth does not change, as viewed from the Moon. C) Half of the side of Earth facing the Moon is bright and half is dark. D) Most of the side of Earth facing the Moon is bright.
A 160 lb person has a mass of 160/32 = 5 slugs. A 160 lb person steps into an elevator and stands on a bathroom scale. Determine the scale reading for the given scenarios. After moving upwards at constant speed, the elevator is slowing down at 2 m/s2 as it is coming to rest
a. 150 lb c. 170 lb b. 160 lb d. none of the above
When a sine wave is used to represent a sound wave, the crest corresponds to
a. rarefaction. b. condensation. c. point where molecules vibrate at a right angle to the direction of wave travel. d. region of low elasticity.
An electron's de Broglie wavelength is 2.4 ?m. What is its speed?
A) 3.0 × 102 m/s B) 2.5 × 105 m/s C) 1.7 × 103 m/s D) 8.3 × 106 m/s