An elementary particle has a measurable size
a. True
b. False
Indicate whether the statement is true or false
False
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Your vision is sharpest when your pupil is
A) dilated. B) constricted. C) same either way
Since atoms are mostly empty space, why don't objects pass through one another?
A) The electrons on the atoms repel other electrons on other atoms when they get close. B) The nucleus of one atom repels the nucleus of another atom when it gets close. C) The nucleus of one atom attracts the nucleus of a neighboring atom to form a barrier. D) The electrons of one attract the nucleus of a neighboring atom to form a barrier.
A particle (charge = Q) is kept in a fixed position at point P, and a second particle (charge = q) is released from rest when it is a distance R from P. If Q = +2.0 mC, q = -1.5 mC, and R = 30 cm, what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?
a. 60 kJ b. 45 kJ c. 75 kJ d. 90 kJ e. 230 kJ
Along the open ocean, barrier islands are zones of
A) relatively quiet waters. B) deposited sand ridges formed offshore and parallel to the coast. C) intense vegetation growth. D) eroded sand ridges.