If a 0.5 kg mass is hanging on the end of a piece of fishing line, what are the frequency of the waves when the line is plucked

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

In physics the desire of an object to keep doing what it is doing is termed?

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?