Kelly ran electricity though a sample of water using electrolysis. The water changed into two gases, X and Y. It was not possible to break down the gases X and Y into simpler particles. Which statement is best supported by this evidence? A. The gases X and Y are elements. B. The gases X and Y are compounds. C. Water is an element. D. The gas Y is water vapor.

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?