Which statement about polymers is true? A. Polymers are substances that have relatively large molecules. B. Oil and gas are the starting materials for making all polymers. C. Fabrics such as cotton and silk are synthetic polymers. D. All polymers are obtained from living organisms.

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.