What does it mean for a physical quantity in a system to be conserved?
a. It is used in the most efficient manner possible.
b. It stays in its original state forever.
c. The total amount of it in the system stays constant.
d. none of the above.
c
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Aristotle believed that natural laws could be understood by _______. In contrast to Aristotle's way of explaining nature, Galileo relied on __________.
A. logic; experiment B. experiment; logic C. mathematics; patterns D. patterns; mathematics
Why is the solar nebula theory considered a theory rather than a hypothesis?
a. It has extensive evidence and explains many observations of different objects. b. It solves the angular momentum problem, which is the main problem of Solar System formation research. c. It is based on mathematical models and previous calculations of molecular and particle properties. d. It is accepted by most scientists nowadays, and it is conventionally named as a theory
Add and and express your answer in milligrams (mg)
A) 7.05 × 107 mg B) 7.05 × 104 mg C) 7.05 × 105 mg D) 7.05 × 106 mg
A drinking glass has a diameter of 2.5 inches and is 5.5 inches tall. What is the volume of the drinking glass in cubic centimeters?
A) 170 cubic cm B) 440 cubic cm C) 350 cubic cm D) 710 cubic cm E) 530 cubic cm