What aspect of Kepler's theory would have horrified all astronomers before Kepler?
A) Kepler's elliptical orbits.
B) The fact that the Earth has a spherical shape in Kepler's theory.
C) Kepler's simple circular orbits.
D) The fact that Earth was no longer at the center.
E) The absence of any epicycles [or "circles-within-circles"].
A
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What approach for estimating the distance to a galaxy requires the measurement of a galaxy's rotation speed?
A. Type Ia supernova as standard candles B. the Tully-Fisher method C. Hubble's law D. Cepheid variables as standard candles
The cause of Venus' slow rotation is unknown at present
Indicate whether the statement is true or false
The wave equation is written down in an exam as
?
.
?
From dimensional considerations we see that
A.
.B.
.C.
D.
.E.
.In a supermarket, you place a 22.3-N (around 5 lb) bag of oranges on a scale, and the scale starts to oscillate at 2.7 Hz. What is the spring constant of the spring of the scale?
A) 650 N/m B) 600 N/m C) 330 N/m D) 820 N/m E) 410 N/m