The basic physical principal principle that explains the operation of rocket engines is
A) the atomic hypothesis.
B) the law of force pairs.
C) Galileo's principle of falling.
D) the law of inertia.
E) Actually, rockets are unexplainable.
B
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What do astronomers mean by the term "hot Jupiters"?
A) planets with masses and composition similar to what we would expect if Jupiter were hotter B) massive planets that orbit stars that are more massive and hotter than our Sun C) planets with masses similar to Jupiter, but that orbit very close to their central star D) planets with masses similar to Jupiter, but compositions that are similar to Mercury E) planets with masses and orbits similar to Jupiter but for which infrared observations indicate they are surprisingly hot in temperature
Doubling the temperature of a blackbody will double the total energy it radiates
Indicate whether the statement is true or false
The change in the direction of a wave resulting from its encountering a small slit is known as
a. interference. b. diffraction. c. reflection. d. polarization.
A charged particle is observed traveling in a circular path of radius R in a uniform magnetic field. If the particle were traveling twice as fast, the radius of the circular path would be
A) R/2. B) 8R. C) R/4. D) 4R. E) 2R.