Noel is trying to understand the relationship between electron flow and the polarity of an electromagnet. He wants to test the electromagnet he created, shown in the photograph. First, Noel needs to know which direction electrons flow through the copper wire. Which statement about the flow of electrons is correct?

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

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.