What type of circuit is shown? open parallel circuit
closed parallel circuit
closed series circuit
open series circuit

Can anybody me with this? ? (picture included.)

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?