Earth's gravity acts upon objects with a steady force of
a. 8.9 meters per second
b. 9.8 meters per minute
c. 8.9 meters per minute squared
d. 9.8 meters per second squared

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.

What happens when a rubber rod is rubbed with a piece of fur?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?