To fully describe the apparent motion of the planets in the sky, Ptolemy's model invoked

A) ellipses.
B) constant speeds.
C) a heliocentric view.
D) epicycles.
E) Occam's Razor.


D

Physics & Space Science

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If ? = 40°, ? = 60°, and M = 4.0 kg, determine the tension in string 1



a.
15 N

b.
22 N

c.
17 N

d.
20 N

e.
36 N

Physics & Space Science

Define solubility. Give an example

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Wave Characteristics: How far does a beam of light travel in 2.0 ms? (c = 3.0 × 108 m/s)

A. 6.0 × 105 m B. 0.66 × 105 m C. 90 m D. 70 m E. 60 m

Physics & Space Science

An electron moving in the positive x direction experiences a magnetic force in the positive z direction. If Bx = 0, what is the direction of the magnetic field?

a. negative y direction b. positive y direction c. negative z direction d. positive z direction e. negative x direction

Physics & Space Science