The period of a mechanical wave is 4 seconds. What is the frequency of the wave?
80 Waves second
40 waves second
0.25 waves second
depends on the speed of the wave

D

d. 2.50

Minds On Physics the App ("MOP the App") is a series of interactive questioning modules for the student that is serious about improving their conceptual understanding of physics. Each module of the series covers a different topic and is further broken down into sub-topics. A "MOP experience" will provide a learner with challenging questions, feedback, and question-specific help in the context of a game-like environment. It is available for phones, tablets, Chromebooks, and Macintosh computers. It's a perfect resource for those wishing to refine their conceptual reasoning abilities. Part 5 of the series includes topics on Wave Motion.

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up