Which of the following objects conducts heat the best?

a. hot soup
b. the gas in a hot air balloon
c. a metal spoon
d. there is no difference in the heat conduction of these items.

In what direction does the medium move relative to the direction of the wave? explain.

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 composition of water moves to begin a deepwater current?