Kepler's first law worked, where Copernicus' original heliocentric model failed, because Kepler described the orbits as
A) much larger than Copernicus had envisioned.
B) complex, with epicycles to account for retrograde motions.
C) around the Sun, not the Earth.
D) elliptical, not circular.
E) being on equants instead of epicycles.
D
You might also like to view...
Reactance: As the frequency of the ac voltage across an inductor approaches zero, the inductive reactance of that coil
A. approaches zero. B. approaches one. C. approaches infinity. D. becomes negative.
When you look through a sheer curtain at a distant street lamp, you see a pattern of colored spots of light. This occurs by
a. polarization of light in scattering and partial absorption by the threads. b. interference of light waves that pass through the threads with light waves that pass through the openings between the threads. c. refraction of light waves differentially in the cylindrical threads. d. diffraction of light waves passing through the two dimensional pattern of openings between the threads. e. reflection of light waves by the sides of the threads.
What would be the resonant frequency of an LRC circuit with R = 15 ?, L = 25 mH, and C = 30 ?F?
A) 1150 Hz B) 180 Hz C) 60 Hz D) 120 Hz E) 53 MHz
The energy associated with a photon of blue light is ________________ the energy associated with a photon of red light
a. greater than c. equal to b. less than d. unrelated to