Which condition should the variable potential difference(whish Feeds a loud speaker) satisfy to emit an audible sound

What describes the formation of horizon b? a. forms at the surface b. features parent material c. undergoes the most change d. forms due to decomposed material i think the answer is c. undergoes the most change

When flexing to a reflective style, one should be specific, brief and to the point, and maintain a fast and decisive pace?

2. which of the following does not affect the electrical resistance of a body? a. material composing the body b. bodies directly surrounding the body c. length of the body > d. temperature of the body