In pure form, germanium and silicon are what kind of conductors?

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

The ph is the a.independent variable b.the dependent variable c.control group

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.