Which of the following defines "frequency"?

a property of a wave that describes how many wave patterns or cycles pass by in a period of time

the distance between adjacent peaks in a series of periodic waves

the speed at which electromagnetic radiation travels in a vacuum

l = c/n

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Which subatomic particle has a negative charge