Assignment 4

Assignment 4 - PHYS-232 Heat and Waves - Homework 4 Winter...

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Unformatted text preview: PHYS-232 Heat and Waves - Homework 4 Winter Semester 2008 Due on Tuesday, February 19, 2008 1. Problem 1.4.1 in the class notes (modified). The HCl molecule can be described as two atomic masses ( 1 H and 35 Cl) coupled by a spring with spring constant k =481 N/m. What is the frequency of vibration of the HCl molecule? By what factor does this frequency change if hydrogen is replaced by deuterium? 2. Solve problem 1.3.1 of the class notes. 3. Hubbles law. In 1929 Edwin Hubble found, after nearly a decade of ob- servation, that the redshift of light coming from distant galaxies is correlated with their measured distance. This relation is called Hubbles law. It indicates that distant galaxies are moving away from our galaxy. This is one of the most often cited pieces of evidence in support of the Big Bang theory of modern cosmology. The redshift z is defined as 1 + z = o e = e o , where e and e are the wavelength and frequency of light when it was emitted by the distant...
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