Static Electricity: If you were to triple the charges on each object and double the distance between the charged objects, would the force of electrostatic attraction be bigger or smaller? How would it change? Circuits If a circuit is connected across a 120-V power source and has a resistance of 285 0, what is the current through the circuit and the power dissipated by the circuit? Electromagnetism If you turned a coil of wire in a magnetic field faster, what would happen to the current produced? What is one other change that could also increase the current produced? Waves & Sound Calculate speed of sound at a 20C then find wavelength of the sound wave if it has a frequency of 425 Hz. Light Calculate the index of refraction of a plastic in which light has a speed of 2.58 x 108 m/s