The power in an electrical circuit is given by the equation p = i2r, where i is the current flowing through the circuit and r is the resistance of the circuit. i. what is the power in a circuit that has a current of 12 a and a resistance of 100 ω? (note: 1 a2·ω = 1 w) ii. what is the current in a circuit that has a power of 200 w and a resistance of 150 ω?

What is the measure of a change in an objects velocity?

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th