Homework assignments
Elle Yav à
04/1920
2020SP MATH
1316-23005
Time Remaining: 02:14:38 Submit Test
This Test: 25 pts possible
Test: Test #3 - Chapters 5 & 6
This Question: 1 pt
20 of 25 (15 complete)
The pressures caused by pure tones on the eardrum are sinusoidal. The change in pressure P in pounds per square foot on a person's eardrum from a pure tone at
time t in seconds can be modeled using the equation P A sin (2x ), where is the frequency in cycles per second, and is the phase angle. When P is positive,
ve and the
005
there is an
increase in pressure and the eardrum is pushed inward, when P is negative, there is a decrease in pressure and the
eardrum is pushed outward. A graph of a tone P(1) .005 sin 2x(273.62)t is shown to the right. Complete parts
(a) through (c) below.
(a) Determine algebraically the values oft for which P o ver (0.005).
The solution set is
(Round to five decimal places as needed. Use a comma to separate answers as needed.)
(b) From the graph and your answer in part (a), determine the interval for which Psover (0.005).
(Type your answer in interval notation)
(c) Would an eardrum hearing this tone be vibrating outward or inward when P >0?
o
inward
Click to select your answer(s).