What is a fossil fuel? 1.a nonrenewable energy source 2.made from non-living matter 3. a nonrenewable energy source (same as a) 4. made from humans

Determine the maximum r-value of the polar equation r =3+3 cos 0

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?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above