How can I solve these? 1) How many turns of wire would be required to make a 160-mH inductor out of a 32.0-cm-long air-filled solenoid with a diameter of 6.3 cm ? N = turns

2) When a car drives through the Earth's magnetic field, an emf is induced in its vertical 55-cm-long radio antenna. What is the maximum emf induced in the antenna? The car's speed is 30.0 m/s on a horizontal road, the Earth's field is (5.0×10^−5 T), and the dip angle of 38 degrees. ε =

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.

What is an electric motor? explain its operation. 2-3 sentence

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?