What is meant by a scientific paradigm?
A) a radical change in scientific thought
B) a pseudoscientific idea
C) a generally well-established scientific theory or set of theories
D) a conundrum, or unexplained set of facts
E) a historical theory that has been proved inaccurate
C
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Two point charges of +1.0 ?C and -2.0 ?C are located 0.50 m apart. What is the minimum amount of work needed to move the charges apart to double the distance between them? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) -36 mJ B) +18 mJ C) 0 mJ D) +36 mJ E) -18 mJ
The Greenland ice sheet can be one km thick. Estimate the pressure underneath the ice. (The density of ice is 918 kg/m3.)
a. 9.0 × 10^5 Pa (9 atm) b. 2.5 × 10^6 Pa (25 atm) c. 4.5 × 10^6 Pa (45 atm) d. 9.0 × 10^6 Pa (90 atm)
Expansion and Contraction of water in rock cracks due to freezing and thawing is
What will be an ideal response?
The ratio of an animal's brain weight to body weight is thought to be roughly proportional to its
A) sex drive B) height C) rate of movement D) intelligence