About how often does the sun have a pole reversal?

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.

Which of the following is an example of units for speed

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false