Suppose you like to listen to two different radio stations. The opera station broadcasts at 905 MHz and the rock and roll station broadcasts at 107.1 MHz.

a) which station’s signal has waves with higher energy

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.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.