Occam's Razor

A) divides the inner planets from the outer planets.
B) tells scientists to use the simplest model, all other things being equal.
C) is the term that describes how thin the rings of the Jovian planets are.
D) describes how a planet's orbital period and distance from the Sun are related.
E) is the tool that Copernicus used to shave.


B

Physics & Space Science

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Two displacement vectors have magnitudes of 5.0 m and 7.0 m, respectively. If these two vectors are added together, the magnitude of the sum

A) is equal to 2.0 m. B) could be as small as 2.0 m or as large as 12 m. C) is equal to 12 m. D) is equal to 8.6 m.

Physics & Space Science

Igneous rock that formed on Earth's surface by solidification of lava is known as

a. extrusive rock. b. intrusive rock. c. metamorphic rock. d. silicate rock.

Physics & Space Science

Detailed measurements of the disk and central bulge region of our Galaxy suggest our Milky Way is a

A) dwarf galaxy. B) spiral galaxy. C) very flat elliptical galaxy. D) very dusty irregular galaxy. E) quasar.

Physics & Space Science

A plastic block of dimensions 2.00 cm × 3.00 cm × 4.00 cm has a mass of 30.0 g. What is its density?

A) 0.80 g/cm3 B) 1.20 g/cm3 C) 1.25 g/cm3 D) 1.60 g/cm3

Physics & Space Science