How many molecules are indicated by writing 2 h2o? a.) 2 b.) 3 c.) 4 d.) 1

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in