1. What was Swimmer C's average speed?

2. What was Swimmer A's average speed during the period 10 min to 20 min?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

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

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.