ITEM 2: You have a 6V, 400mA solar powered water pump. How many cells and in what configuration would you need to supply power to the pump? Explain your answer. Assume cells are 100% efficient. Each solar cell is rated at 3V and 200mA.

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.

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created