If two point sources that create circular waves are moved closer together, what happens to the spacing between the nodal and anti-nodal lines? a. the spacing increases. c. the spacing stays the same. b. the spacing decreases. d. none of the above.

Argon, neon, and xenon are examples of

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.

Photons with the highest energy have the longest period