15. Communicating Concepts Write an essay that clearly explains to a 3rd grade student why objects float or sink. Your essay should include a thesis
statement and evidence that supports your ideas. Finally, make sure that
your essay has a conclusion sentence,

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Energy flows from the producer level to the level. is called