Old Homework 37 - portillo (gdp347) oldhomework 37 Turner...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
portillo (gdp347) – oldhomework 37 – Turner – (58185) 1 This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points Radio waves travel at the speed oF light: 3 × 10 5 km / s. What is the wavelength oF radio waves re- ceived at 90 . 5 MHz on your ±M radio dial? Correct answer: 3 . 31492 m. Explanation: Let : v = 3 × 10 5 km / s = 300 million m / s and f = 90 . 5 MHz = 90 . 5 million Hz . λ = v f = 300 million m / s 90 . 5 million Hz = 3 . 31492 m . 002 10.0 points Two harmonic waves are described by y 1 = A sin( k x - ω t - φ 1 ) and y 2 = A sin( k x - ω t - φ 2 ) , where k = 6 m - 1 , A = 8 m , ω = 641 rad / s , φ 1 = 0 rad , and φ 2 = 2 rad . What is the Frequency oF the resultant wave y = y 1 + y 2 ? Correct answer: 102 . 018 Hz. Explanation: Since sin θ 1 + sin θ 2 = sin θ 1 + θ 2 2 cos θ 1 - θ 2 2 , the resultant wave is y = y 1 + y 2 = A cos p φ 2 - φ 1 2 P × sin p k x - ω t - φ 1 + φ 2 2 P and the Frequency is f = ω 2 π = 641 rad / s 2 π = 102 . 018 Hz . 003 (part 1 oF 2) 10.0 points A harmonic wave in a wire has amplitude 2 . 16 mm, wavelength 2 . 3 m, and Frequency 790 Hz. What is the propagation speed oF the wave? Correct answer: 1817 m / s.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/25/2012 for the course CHEM 302 taught by Professor Mccord during the Spring '10 term at University of Texas at Austin.

Page1 / 4

Old Homework 37 - portillo (gdp347) oldhomework 37 Turner...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online