Who invented lightning rods to protect buildings from lightning?
a. van de graaff
b. benjamin franklin
c. william gilbert
d. charles de coulomb

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

For which pair of objects would adding the same a

Which levels of government establish and implement educational requirements for minors