to measure the time period of simple pendulum cut a piece of a string 1 metre long attach a small clay bob and to one end of the string .starting at the angle of 10 degrees allow the pendulum to swing and measure the pendulum for 20 oscillations using stopwatch

a.

explanation:

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

battery with hi vtge high val resist in series

it has to be b, about 97 percent.