Question1
A molecule of DNA (deoxyribonucleic acid) is 2.35 µm long. The ends of the molecule become singly ionized -- negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.01 percent upon becoming charged. Determine the efficient spring constant of the molecule.
Question2
Two point charges, = -5.3 and = 1.6 are located between two oppositely charged parallel plates. The two charges are separated by a distance of = 0.35. Assume that the electric field produced by the charged plates is uniform and equal to = 7.3×104.
Question3
A spelunker is surveying a cave. She follows a passage 180.0 m straight west, then 210.0 m in a direction southeast then 90.0 m at 30.0 wests of north. After a fourth unmeasured displacement, she finds herself back where she started. Establish the magnitude and direction of the fourth displacement.