If there are 3 resistors of 4 ohms, 6 ohms, and 12 ohms connected in series then what is the equivalent resistance?

If there are 3 resistors of 2 ohms, 2 ohms, and 1 ohm connected in parallel then what is the equivalent resistance?

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

If you let go of the notebook after lifting it, will it move? how?