Explain how lenses in glasses or contacts need to change the light waves that enter the eye for a person who is 1.Nearsighted
2.Farsighted

Use the terms convex and concave in your answer.

Answer as quick as ! kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energyb. motion energyc. sound energyd. thermal energy

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?