2/10/15
Lab 3: The Nature Of Statistical Processes
In-line questions:
6. Mean: 105.013.8ct/sec
7. 1/100th of a second because in one second, 100 events occur. Therefore if we want to isolate
a single event it would be logical to divide by 100. By doing th
2/26/15
Lab 4: Distraction and Reaction Time
3.5 PRELAB EXERCISES
1. Assume that a ruler is initially suspended such that its lower end is at height, h = 0. The ruler
is then dropped and allowed to accelerate, towards the earth, under the influence of gra
9/23/2013
Lab 2-Reaction Time: What effect does talking or texting really have?
1.
Procedure:
Not Distracted Procedure:
1. Place a ruler in the aluminum shield. Have the experimenter hold the ruler in place.
2. Drop the ruler without warning the test subj
Announcements
Midterm 2 grades posted on Blackboard, along
with example solu;ons
Lowest midterm score will be dropped
Lowest prelecture, checkpoint, online homework,
wri=en homework and clicker scores will be dropped
General Physics 1
Administra3ve
Example homework solu3ons will posted on Blackboard
later today
Complete survey at
h?ps:/www.surveymonkey.com/s/8SPQ3YL
Homework 2 is due online Thursday at 10 pm
Policy: late home
Welcome to
General Physics
General Physics 171.101
Instructor: David Neufeld (call me David)
Email: neufeld@pha.jhu.edu
Oce: Bloomberg 509
Oce hours: Wednesdays, 9:30 am 12:30 pm
Graduate student Teaching Assistants
2/10/15
Lab 2: Data Analysis with Spreadsheets
1. As part of this tutorial, discuss some of the possible problems with the measured
values of v and h. How would a biased measurement in velocity or height effect
this measurement?
Biased Measurement in Heig
General Physics 1
Announcements
Homework 2 is due online at 10 pm tonight
Midterm Exam 1 will take place Friday September
27th at 8 am
LocaEon to be announced next week
Will cover prelectures 1 6, class
Announcements
View Smart Physics prelecture and complete
checkpoint by 8 am before each class
For Thursday: Prelecture 3 and Checkpoint 3
Note that you can register for a free 30-day trial
Homework 1 is due on
Announcements
Homework 7 is due online tonight at 10 pm. Bring wri;en
version to exam tomorrow
TOMORROW at 8 am for ALL secFons: Midterm Exam 2
Will cover Prelectures 7 13
Similar in style to Midterm
General Physics 1
A yo-yo on a horizontal surface,
iniCally at rest
Pull gently on the string as shown: which way
will the yo-yo move?
1) Roll to the right
T
2) Roll to the le<
3) Remain in place
N W FS
3/31/15
Physics 2 Lab
Lab 8: Conservation of Momentum
Prelab:
2.5 EXERCISES:
1. Through the laws of conservation of energy and momentum we derive the following
equations:
Equation 1 can be rearranged to give rise to:
Eq. 2 can be rearranged to give rise t
Announcements
Homework 7 is due online Thursday at 10 pm. Bring wri=en
version to exam on Friday
This Friday 10/25 at 8 am for ALL secGons): Midterm Exam 2
Will cover Prelectures 7 13
Similar in style
Announcements
1)
2)
Homework 9 due today at 10 pm (online) and in sec:on
tomorrow (wri;en)
Midterm 3, covering prelectures 14 20, will be given on
Friday November 15 at 8 am in the same rooms as Midterm 2
Announcements
1) Homework 9 due for Thursday at 10 pm (online)
and in sec=on on Friday (wri?en)
2) Midterm 3, covering prelectures 14 20, will be
given on Friday November 15 at 8 am in the
same rooms as Midterm
General Physics 1
Announcements
Homework 3 is due online at 10 pm Thursday
Midterm Exam 1 is this Friday 9/27 at 8 am
Will cover prelectures 1 6, class meeJngs through
today, homeworks 1 3
Will be open
Ch. 43 Page 1
CHAPTER 43 Nuclear Energy; Effects and Uses of Radiation Note: 1. A factor that appears in the analysis of energies is e2/4p0 = (1.60 1019 C)2 /4p(8.85 1012 C2/N m2)= 2.30 1028 J m = 1.44 MeV fm.
We find the product nucleus by bal
Ch. 42 Page 1
CHAPTER 42 Nuclear Physics and Radioactivity Note: A factor that appears in the analysis of energies is e2/4p0 = (1.60 1019 C)2/4p(8.85 1012 C2/N m2) = 2.30 1028 J m = 1.44 MeV fm.
1.
To find the rest mass of an particle, we subt
Chapter 41
p. 1
CHAPTER 41 Molecules and Solids Note: At the atomic scale, it is most convenient to have energies in electron-volts and wavelengths in nanometers. A useful expression for the energy of a photon in terms of its wavelength is E = hf
Ch. 45
Page 1
CHAPTER 45 Astrophysics and Cosmology Note: A factor that appears in the analysis of energies is e2/4p0 = (1.60 1019 C)2/4p(8.85 1012 C2/N m2) = 2.30 1028 J m = 1.44 MeV fm. 1. Using the definition of the parsec, we find the equiv
4/30/15
Physics 2 lab
Lab 10: When Approximations Fail
Prelab Questions:
1. Calculating the expected frequency of oscillation:
2. Observed amplitude: .07882 .000184 rad
Angular frequency: 3.501 .0004038 rad/sec
3. Because the observed frequency and the fr
4/7/15
Lab 9
Prelab Questions:
Inline Questions:
1. The chime ball was more solid like.
2. No we were not able to statistically distinguish the moment of inertia between the various
balls (the error bars overlap)
Conclusion:
Experimental Design:
1. We set
4/21/15
Lab 11: Ballistic Pendulum
Prelab:
1. The period will be the one to contribute the most because everything else is a constant.
Because the period is what we are measuring each time, this is the variable that will most
likely have error.
2. The val
3/24/15
Lab 7: Arm Model
Prelab:
1. Sum of the torques will equal zero therefore Tau_i will be equal to the neg value of
Tau_o. Tau_i= 20cm*Fi and Tau_o=100cm*Fo.
2. MA=(-rin/rout), Tau_out=-Tau_in
Characterizing the Spring:
Procedure:
1. Measured initial
Lab 1: Introduction to Measurements
1. 6.5 .1cm
2. 63.41 .01mm, This measurement seems more accurate than the result from exercise 1. It is
also smaller than the value from exercise 1 but it is close in value.
3. 57.09.01mm, It is the same in theory becau
Announcements
Homework 3 is due online at 10 pm tonight
No sec:on, so bring wri=en version to exam tomorrow
Midterm Exam 1 is tomorrow Friday 9/27 at 8 am
Will cover prelectures 1 6, class mee:ngs through
Announcements
Homework 1 is due online at 10 pm tonight, with wri9en
version due in sec;on tomorrow
Next Tuesday: Prelecture 4 and Checkpoint 4
Physics tutoring room (Rm. 261) is open 2 8 pm today
Regular
Welcome to Physics 102!
Physics is the most fundamental of the sciences, and a beautiful
and exciting subject. This semester we will be studying classical
mechanics.
You will need two items for this class. If at all possible, please try to acquire the fir