What is the frequency of an electromagnetic wave with a wavelength of 1.0 x 10^5 m? I keep getting stuck between 3.0 x 10^3 & 3.0 x 10^13

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.