The ?0 meson has a mass of 264 times that of an electron
What is the approximate range of the force mediated by this particle? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 1.5 × 10-14 m B) 1.5 × 10-10 m C) 1.5 × 10-12 m D) 1.5 × 10-15 m
D
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Once a theory has been tested thoroughly and is confidently believed by scientists, it becomes a ____________________
Fill in the blank(s) with correct word
Which of the following statements about the recently-discovered object Eris is not true?
A) It is slightly larger than Pluto. B) It lies well beyond Pluto and Neptune. C) It is thought to be the first example of a new class of object. D) It orbits the Sun in the same direction as the other planets.
The reverse of the respiration reaction is the reaction known as
A) combustion. B) oxidation. C) photo-synthesis. D) inhaling. E) exhaling.
Pigs wallow in mud mainly to
A) decrease thermal conductivity. B) shield themselves from the Sun. C) cool themselves by evaporation.