Answer Happy

(13%) Problem 10: A student knows that an ambulance siren has a frequency of f, = 393 Hz. He measures, when the ambulance is approaching him, the frequency fo=413 Hz. Assume the speed of sound is 343 m/s in this problem. V/₂= 33% Part (a) Input an expression for the ambulance's speed, v,, in terms of the frequencies and the speed of sound v. C a f₁ 3 P Hints: 0% deduction per hint. Hints remaining: 2 Submit d 8 k t Hint 0 fo h m V ( 14 6 78 9 5 1 2 0 3 + - VOCAT I give up! Feedback: 0% deduction per feedback. Grade Summary Deductions Potential 05 100% Submissions Attempts remaining: 5 (5% per attempt) detailed view
33% Part (b) What is this speed, in meters per second? V₂ = sin() cotan() atan() cosh() m/s cos() asin() acotan() tanh() Degrees O Radians Hints: 0% deduction per hint. Hints remaining: 1 Submit tan() BCOS() sinh() cotanh() Hint T ( BM4 7 8 9 5 6 1 2 3 0 + - VOTADSPLE C Fordbuck 1 give up! Feedback: 0% deduction per feedback. Grade Summary Deductions Potential 05 100% Submissions Attempts remaining: 5 (5% per attempt) detailed view
& 33% Part (b) & 33% Part (c) 2²=1 What is this speed, in meters per second? If ambulance is moving away with the same speed as in part (b), what is the wavelength measured by the student in meters? Grade Summary Deductions Potential sin() cotan() atan() cosh() m Hints: 0% deduction per hint. Hints remaining: 2 cos() asin() acotan() tanh() Degrees O Radians tan() A ( acos() E Submit sinh() cotanh() Hint N 7 8 9 HOME 4 5 6 1 2 3 0 B + . VO BACKSACE I give up! Feedback: 0% deduction per feedback. 100 Submissions Attempts remaining (5% per attempt) detailed view