(8%) Problem 5: The softest sound a human ear can hear is at 0 dB (= 10-12 W/m²). Sounds above 130 dB cause pain. A part

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8 Problem 5 The Softest Sound A Human Ear Can Hear Is At 0 Db 10 12 W M Sounds Above 130 Db Cause Pain A Part 1 (26.93 KiB) Viewed 40 times

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(8%) Problem 5: The softest sound a human ear can hear is at 0 dB (= 10-12 W/m²). Sounds above 130 dB cause pain. A particular student's eardrum has an area of A= 51 mm². Randomized Variables A = 51 mm² à 50% Part (a) What is the most power, in watts, the ear can receive before the listener feels pain? Pmax = cos() sin() cotan() asin() atan() acotan() cosh() tanh() ⒸDegrees O Radians Hints: 0% deduction per hint. Hints remaining: 3 A tan() ( 1 7 8 9 acos() E 14 5 6 sinh() I 2 3 0 75 cotanh() Submit Hint + . Padid Feedback: s THE I give up! deduction per feedback. Grade Summary Deductions Potential 0% 100% Submissions Attempts remaining 5 (5% per attempt detailed view
553 50% Part (b) What is the smallest power, in watts, the ear can detect? Pmin= sin() cotan() atan() cosh() cos() asin() Hints: 0% deduction per hint. Hints remaining: 2 acotan() tanh() Degrees Radians tan() acos() sinh() cotanh() Submit Hint J ( } E14 7 I Feedback 0 8 9 5 6 2 3 + VO BACKSPACE . HOME I give up! Feedback: 0% deduction per feedback.
d nd (8%) Problem 7: A student hears a sound with a power of P = 15 µW. At their distance from the source, the sound has intensity I=0.96 W/m². 50% Part (a) Assuming the eardrum is circular, what is the radius of their eardrum, in meters? P 1=1 tan() acos() sinh() cotanh() tanh() Degrees O Radians sin() cos() cotan() asin() atan() acotan() cosh() Hints: 0% deduction per hint. Hints remaining: 2 Submit Hint 7 H ( 8 5 B 1 12 0 VO BACKPAC 7. + . 4 9 6 3 041 mai CERAR I give up! Feedback: 0% deduction per feedback. 110 Grade Summary Dedactions Potential 05 100% Submissions Attempts remaining 5 (5% per attempt) detailed view of the recond
& 50% Part (b) Another student stands in the exact same location, but receives 20% more power from the same source. What is the radius of the second student's eardrums? 72 = sin() cotan() atan() cosh() cos() asin() Hints: deduction per hint. Hints remaining: 1 acotan() tanh() Degrees O Radians tan() acos() sinh cotanh() Submit Hint A ( 1 7 8 E 145 t 1 2 0 + VOE 9 6 3 102022 Fa TALLE t Teedback I give up! Feedback: % deduction per feedback. Grade Nummary Deductions Potential 05 100% Submissions Attempts remaining S (5 per attemp detailed view