Which statement about polymers is true?
1.polymers are substances that have relatively large molecules.
2.oil and gas are the starting materials for making all polymers.
3.fabrics such as cotton and silk are synthetic polymers.
4.all polymers are obtained from living organisms.

The density of a liquid could be found by using

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.