If you observe a variable star with a period of 50 days as a yellow, supergiant star, then you most likely have seen a(n) ____
a. degenerate star
b. RR Lyrae variable star
c. eclipsing binary star
d. Cepheid variable star
e. Type I Pulsar
d
Physics & Space Science
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Exhibit 4-2
Newton approximated motion in a circle as a series of linear motions, as in the polygon below.
Assume that the particle moves at constant speed vA from A to B, and at constant speed vB from B to C.
Use this exhibit to answer the following question(s).
Refer to Exhibit 4-2. The direction of the acceleration,
, at point B, is shown by the arrow ina.
Physics & Space Science
What is the speed of a 6-kg ball with a momentum of 72 kg?m/s?
A) 3 m/s B) 4 m/s C) 12 m/s D) 48 m/s E) none of the above
Physics & Space Science
The lowest layer of Earth's atmosphere is called the ________.
A. terrasphere B. ionosphere C. stratosphere D. ozone layer E. troposphere
Physics & Space Science
All multicellular organisms are
A) Bacteria B) Prokaryotes C) Archaea D) Eukarya
Physics & Space Science