Pretest

Question 1

Which best describes pitch?

Revolt · Accepted Answer

the number of cycles per second perceived by the human ear

Question 2

A sound wave with a power of 8 point 8 times 10 to the negative 4 power cap w leaves a speaker and passes through section A, which has an area of 5 point 0 m squared What is the intensity of sound in this area? open paren Intensity is equal to cap i is equal to the fraction with numerator cap p o w e r and denominator mathrm cap A r e A close paren

Revolt · Accepted Answer

1 point 8 times 10 to the negative 4 power the fraction with numerator cap w and denominator m squared

Question 3

Which is the appropriate unit of measurement for pitch?

Revolt · Accepted Answer

mel

Question 4

If the amplitude of a wave increases by a factor of 4, how is the intensity changed?

Revolt · Accepted Answer

it increases by a factor of 16

Question 5

These graphs show measurements of the density of air as different sound waves pass a single point. Which sound wave will most likely be perceived as the loudest?

Revolt · Accepted Answer

Image with description A graph with a vertical axis labeled Density of Air and a horizontal axis labeled Time. A horizontal dashed line runs through the mid-height of the vertical axis. A repeating wave oscillates above and below the dashed line, with its peaks reaching nearly to the top of the vertical axis and its troughs reaching nearly to the bottom horizontal axis.

Question 6

As the distance of a sound wave from its source quadruples, how is the intensity changed?

Revolt · Accepted Answer

it decreases by a factor of 16

Question 7

Which sound will most likely have the highest pitch?

Revolt · Accepted Answer

a whistle (1000 Hz)

Pretest Answers

More from this Course

TRY EDGENUITY HACKS