MeV/c2)
1.Do NOT use E=pc for protons (see also Homework-4) 2.Treat it as a relativistic case, because in the final answer v=0.76c 3.In relativistic cases, it's NOT true that T=mv2/2
Always, we treat decay problems as relativistic cases.
Here 10%=
Physics 143 Fall Term 2007
HOMEWORK 2
Due: September 10
A very fine wire 7.35 10-3 mm in diameter is placed between two flat glass plates, at one edge of the plates parallel to the sides of the plates. The edges of the plates touch on each other on
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 2
Available: September 3 Due: September 10 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Prob
Physics 143 Fall Term 2007
HOMEWORK 3
Due: September 17 Problem 1: (BFG Ch.2 Problem 18)
A relativistic pole-vaulter holds a pole that is 16ft long in his rest frame. He runs with the pole aligned in the direction of his 1/2. He approaches a shed th
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 3
Available: September 10 Due: September 17 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Pro
Physics 143 Fall Term 2007
HOMEWORK 8
Due: November 5 Problem 1:
Estimate the time that a virtual turnip-antiturnip pair could exist. If you somehow had a real turnip-antiturnip pair, about how much energy would be released when they annihilated?
A
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 10
Available: November 12 Due: November 20 by 4 pm. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem 1: BFG Ch. 9 P
Physics 143 Fall Term 2007
HOMEWORK 4
Due: September 24
Problem 1: (BFG Ch.4 Problem 2)
Chemical processes typically involve energies on the order of 1eV. What, then, is the typical wavelength of electromagnetic radiation emitted in the course of c
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 12
Available: November 26 Due: December 7 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Probl
Physics 143 Fall Term 2007
HOMEWORK 12
Due: December 7 Problem 1: (BFG Ch.10 Problem 13)
Calculate the Fermi energy for Cu and Lead.
The Fermi energy is: EF where n is the density of free electrons: 2m 3 n
/
M n Am N n n V V Am where n i
Physics 143 Fall Term 2007
HOMEWORK 11
Due: November 28 Problem 1: (BFG Ch.10 Problem 1)
Consider two particles in an infinite well.
The quantum state of two particles in an infinite well is: Eq. 1022 or 1023 1 uS x , x u x u x u x u x NS 1 uA
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 9
Available: November 5 Due: November 12 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Proble
Physics 143 Fall Term 2007
HOMEWORK 10
Due: November 20 Problem 1: (BFG Ch.9 Problem 21)
m=-2 The quantum state splits by m, there are 2l 1 energy levels: m=-1 right figure There are 5 3 15 possible transitions. When we m=0 m=1 take into account
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 8
Available: October 29 Due: November 5 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 1
Available: August 27 Due: September 3 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem
Physics 143 Fall Term 2007
HOMEWORK 1
Due: September 3 Problem 1: Introduce Yourself
By next Monday, please send me an email (schol@phy.duke.edu) introducing yourself, indicating: Your major or planned major (if you know it). Your long term profes
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 7
Available: October 22 Due: October 29 at the beginning of class. Imagine you are a science journalist writing for a magazine with a scientifically informed general public re
Duke University Department of Physics Physics 143 Fall Term 2007
PRACTICE QUIZ 2 SOLUTIONS
Problem 1: Consider a helium atom which has had one of its electrons stripped. What formula will describe the frequencies of the spectral lines for this He+ i
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 4
Available: September 17 Due: September 24 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Pro
Duke University Department of Physics Physics 143 Fall Term 2007
PRACTICE QUIZ 1
I will abide by the Duke Community Standard. Name:
This is a closed book exam, with one side of one page cheat sheet allowed. Calculators are allowed, but only for bas
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 11
Available: November 20 Due: November 30 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Prob
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 6
Available: October 15 Due: October 29 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem
Physics 143 Fall Term 2007
HOMEWORK 5
Due: October 15 Problem 1: (BFG Ch.5 Problem 4)
Suppose that a hydrogen atom in the ground state absorbs a photon of wavelength 15nm. Will the atom be ionized? If so, what will be the kinetic energy of the elect
Physics 143 Fall Term 2007
HOMEWORK 6
Due: October 29 Problem 1: (BFG Ch.7 Problem 1, 3)
1. Consider the very simple wave packet x A exp i p p x A exp i p p x
Show that x takes the form of a single plane wave of momentum p multiplied by a functio
Duke University Department of Physics Physics 143 Fall Term 2007
PRACTICE FINAL EXAM
I will abide by the Duke Honor Code. Name:
This is a closed book exam, with two sides of one page cheat sheet allowed. Calculators are allowed, but only for basic
Duke University Department of Physics Physics 143 Fall Term 2007
PRACTICE QUIZ 1 SOLUTIONS
Problem 1: Red light from a laser ( = 632.8 nm) is incident on a screen containing two very narrow horizontal slits separated by 0.200 mm. A fringe pattern ap
Duke University Department of Physics Physics 143 Fall Term 2007
HOMEWORK 5
Available: October 1 Due: October 15 at the beginning of class. Please don't forget to write your name on your solutions! You must always show your work for credit. Problem
Duke University Department of Physics Physics 143 Fall Term 2007
PRACTICE FINAL EXAM
I will abide by the Duke Community Standard. Name:
This is a closed book exam, with two sides of one page cheat sheet allowed. Calculators are allowed, but only fo
Duke University Department of Physics Physics 143 Fall Term 2007
PRACTICE QUIZ 2
I will abide by the Duke Community Standard. Name:
This is a closed book exam, with one side of one page cheat sheet allowed. Calculators are allowed, but only for bas