If a wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is
a. 40 degrees.
b. 80 degrees.
c. 90 degrees.
d. 0 degrees.

"why is graphite used instead of gold or copper wires to conduct electricity in very hot situations such as an industrial kiln? " that's the question, but the thing is, i don't even understand what an "industrial kiln" xd assistance would be < 3

The material that keeps its new shape after it is stretched is called?

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?