An observer in the Southern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?





a.

straight north

b.

straight east

c.

straight south

d.

straight west

e.

straight up, directly overhead


C

Physics & Space Science

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Coulomb's Law: Three point charges are located on the x-axis at the following positions: Q1 = +2.00 ?C is at x = 1.00 m, Q2 = +3.00 ?C is at x = 0.00, and Q3 = -5.00 ?C is at x = -1.00 m. What is the magnitude of the electric force on Q2? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)

A. 0.0540 N B. 0.135 N C. 0.158 N D. 0.0810 N E. 0.189 N

Physics & Space Science

One theory for the origin of life suggests that life was transported to Earth in meteorites. This is referred to as

A) naturism B) intelligent design C) panspermia D) chemical evolution

Physics & Space Science

Instructions: On occasion, the notation will be a shorthand notation for .

Vectors and  have equal magnitudes. Which statement is always true? A.

+ = 0

B.
- = 0

C.
 is perpendicular to + .

D.
  is perpendicular to+.

E.
The magnitude of + equals the magnitude of .

Physics & Space Science

A 100 million-year-old open cluster will no longer contain any O-type stars

Indicate whether the statement is true or false

Physics & Space Science