Rcp11 14.6.p.028. ask your teacher my notes question part points submissions used an airplane traveling at half the speed of sound emits a sound of frequency 4.68 khz. (a) at what frequency does a stationary listener hear the sound as the plane approaches? khz (b) at what frequency does a stationary listener hear the sound after the plane passes? khz

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic