What is an example of technology made possible by understanding quantum mechanics? a.
semiconductors
c.
Both A and B
b.
transistors
d.
None of the above

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

What are the necessary conditions for fusion?