Hey I need to talk to you Julie.

In a system, when potential energy decreases, then entropy also decreases. true false

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

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?