The formula to determine the period of one swing of a simple pendulum is T = 2 π L g , T=2π g L , where L L is the length of the string and g g is the acceleration due to gravity. Solve the formula to solve for g g in terms of π , π, T T and L . L.

g = T / 2πL

Step-by-step explanation:

Given:

T=2π g L

where,

T = period of one swing of a simple pendulum

L = length of the string

g = acceleration due to gravity.

Solve the formula to solve for g in terms of π, T and L

T=2π g L

Divide both sides by 2πL

g = T / 2πL

g in terms of π, T and L is T / 2πL

4 1/2 hours.

Step-by-step explanation:

If 1/2 an hour only used up 1/9 of her battery, 9, 1/2 would give us 9/2, which if you simplified it gets you 8 1/2 hours. Hope this helps! Have a great day!