Why does Ptolemy include epicycles in his model?
What will be an ideal response?
To account for retrograde motion and still preserve uniform circular motion.
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It takes ________ astronauts to operate the Hubble Space Telescope
Fill in the blank(s) with correct word
A hunter points a rifle horizontally and holds it 3.30 m above the ground. The bullet leaves the barrel at 325 m/s and experiences no significant air resistance. The acceleration due to gravity at this location is 9.80 m/s2
(a) How long does it take for the bullet to strike the ground? (b) How far horizontally does it travel?
_________ is a form of electromagnetic radiation produced by rapidly moving electrons spiraling through magnetic fields
a. Lagrangian radiation b. Accretion c. Ultraviolet radiation d. Synchrotron radiation e. Infrared radiation
Most of the information about the Moon's internal structure comes from ________ left on the lunar surface by Apollo astronauts
Fill in the blank(s) with correct word