The ability to regulate the amount of charge flowing in a circuit is
a. alternating current.
b. direct current.
c. resistance.
d. voltage.

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Explain what happens at the saturation point when adding salt to water at room temperature.