Which of the following characterize(s) a wave?
a. Wavelength
b. Amplitude
c. Period
d. All of these
d
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A double convex lens has a focal length of 0.10 m. An object 0.05 m high is placed 0.15 m from the lens surface on the principal axis. Sketch a ray diagram and give the characteristics of the image
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.
The diameter of the Milky Way is 100,000 ly. This distance in SI units is
A) 5 x 1015 m. B) 1 x 1021 m. C) 4 x 1030 m. D) 3 x 1036 m. E) 2 x 1042 m.
Compared to other fundamental forces, the Universal Gravitational Constant G indicates gravity to be a relatively
A) weak force. B) strong force. C) extremely strong force.