A group of students completed a simple experimental investigation. they investigated how the length of the string affects a pendulum’s swing. which of the following is the independent variable in their experiment 1 same angle of release
2 frequency of the swing
3 number of washers
4 length of string
Pleas hel m

Asimple speed reducer is composed of 2 spur gears. the pinion gear has a pitch diameter of 0.75" and 36 teeth while the driven gear has a pitch diameter of 4.0" and 192 teeth. a)-what is the diametral pitch of each gear? b)-if an electric motor rotating ccw at 3000 rpm is coupled to the pinion, what is the rotational speed of the driven gear? c)-if the torque delivered to the pinion is 1 n-m, what is the torque on the driven gear? d)-what is the power transmitted by the gear train?