Planetesimals beyond the orbit of _____ failed to accumulate into a protoplanet because the gravitational field of _____ continuously disturbed their motion

a. Neptune; Uranus
b. Jupiter; Mars
c. Earth; Saturn
d. Mars; Earth
e. Mars; Jupiter


e

Physics & Space Science

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Which of the following is the most reasonable estimate of the number of characters (typed letters or numbers) in a 609-page book? Assume an average of 194 words per page and a reasonable average number of letters per word

A) 5 × 105 char B) 5 × 107 char C) 5 × 106 char D) 5 × 104 char

Physics & Space Science

What is the definition of density?

a. The amount of volume in a standard unit of mass. b. The amount of weight in a standard unit of volume. c. The number of moles in a standard unit of volume. d. The amount of mass in a standard unit of volume. e. The amount of volume in a standard unit of weight.

Physics & Space Science

Minerals that have the same combination of elements but have different atomic arrangements are called

A) polymorphs. B) polygonal. C) tetrahedra. D) polymers.

Physics & Space Science

The satellite most critical to the study of the formation and structure of the universe is ________, which detected the ripples that led to galaxies

A) WMAP B) Fermi C) Planck D) HST E) COBE

Physics & Space Science