Ancient philosophers and astronomers accepted without question-as first principles-that:
A) heavenly objects must move in circular paths at varying speeds.
B) the planets are made of rock and gas, much like Earth.
C) the Earth is motionless at the center of the Universe.
D) there are many galaxies in the Universe.
Ans: C) the Earth is motionless at the center of the Universe.
You might also like to view...
If sunlight were green instead of white, the most comfortable color to wear on a hot day would be
A) magenta. B) yellow. C) green. D) blue. E) violet.
Diffraction Gratings: Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. If the third-order maximum of the diffraction pattern is observed at 32.0°, what is the total number of maxima can be seen?
A. 5 B. 7 C. 10 D. 11 E. 8
Dense biomass and tremendous species diversity characterizes the
What will be an ideal response?
The cosmic microwave background peaks at a wavelength of about 1 mm, and the universe has a temperature of about 3 K
If the microwave background peaked at a wavelength of 10 micrometers, what would its temperature be? (Hint: see Cosmic Calculations 5.1 and 17.1) A) about 0.3 K B) about 300 K C) about 30 K D) about 0.03 K