A simple pendulum with a period of 2 seconds can be used as a chronograph to measure time with great accuracy. A platinum wire attached to the bob completes the electric timing circuit through a drop of mercury as it swings though the lowest point. a. What should be the length, L, of the pendulum

0.994 m

Explanation:

For a simple pendulum, the period of oscillation is given by

wher L is its length and g s the acceleration due to gravity.

Rearranging the formula,

T = 2

Take g = 9.81

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.