Science in Focus: Force and Motion: Workshop 8. Bend and Stretch
We all expect a spring to stretch or compress when a force is applied, but forces can even deform solid objects like the floor or the top of a table. In this workshop, students in a high school classroom explore ideas about tension and normal force. By applying a force to a spring and measuring the distance the spring is stretched, the students calculate the force constant or stretchiness of the spring. Lecture demonstrations using student volunteers help to illustrate that even rigid objects be
Rows of concentration camp prisoners in striped garments seen from the back; two german officers amongst them. Signed lower right.,Rows of concentration camp prisoners in striped garments seen from the back; two german officers amongst them. Signed lower right.,Born in 1910 in Floss, Bavaria, David Ludwig Bloch lost his hearing as a child. At age 5 he came to Munich to the national institute for the deaf and mute. Subsequently, he attended a private school for the deaf in Jena. He began to study
Morton Letter to Andrew Johnson, 1865 (page 4)
aimed at by the conspiracy of which these
men were are guilty, I trust it will not be
considered unbecoming, or improper for
me to present their cases for your consider=
ation, and I do it earnestly urging the
commutation as above suggested, sincerely
beleiving such a course would be better
for the present and for the future.
Had the death penalty been inflicted
shortly after their conviction, and while the
country was still no great peril I should
Sconill Letter, 1865 (page 1)
E. A. Sconill writes to Mrs. Brown at the request of her brother Henry B. McLaughlin "a prisoner of war confined at this post." Henry made application to take the oath of allegiance and Sconill believes he is sincere and should be released, but does not have the power to grant his release. On the side of the letter there is a note from President Lincoln dated January 12, 1865 stating that Henry McLaughlin may take the oath and be discharged.,Depot of Prisoners of War, near
Sandusky, Ohio, Jan
Beem Letter, December 1863
This is David Beem's third Christmas letter to his wife since the war began. He speaks longingly of the turkey dinner he is missing at home. Christmas at the camp is just another day with no special meal. Many of the soldiers are drinking more whiskey than normal and celebrating Christmas by getting drunk and shooting their weapons.
Fast Scan Voltammetry
A short presentation of theory and practice of electrochemistry focused on use of microelectrodes and micro-bands in flow cells. Problems encountered are addressed and response characteristics discussed.
Funderstanding Roller Coaster
Provided by Funderstanding.com, the Roller Coaster Java applet Web site allows students to design their own roller coaster. After waiting for the program to load, users can change the height of two hills and the loop, the speed and mass of the car, and the gravity and friction being applied. After hitting the green start button, you get to see if the car flies off the track or doesn't make it through the loop. A simple but fun site.
not offended at anything that I have said or done you have not forgotten how to write have you then why is it I never hear from you anymore perhaps my letters have lost their power to please and to not interest you any longer if so I cannot help it I know there is but little merit in them but they are the effusions of an honest heart our Regiment is on Provost duty in Chattanooga our Brigade is stationed here Gen Wagner has command of the post our Brigade was first to enter the Rebel Strong
you a short description of the appearance of the field on coming to look over it on Wednesday I will let you judge for yourself of this mighty battle then I will tell you that it covered an area of forty two square miles and that the field everywhere bore traces of the conflict yes this battle for numbers and stubborn fighting will rank with any of the Old-World it has been a conflict that will be fresh in the memories of the American people when that of Austerlitz Marengo and Solferno shall b
immediately embarked on the Hiawatha (proud name that) but for some reason unknown to me did not start for an hour about eleven we got under way and a little after twelve we arrived at Pittsburg-landing we immediately went ashore fell into ranks and proceeded on the run to the Battlefield still four miles distant it did not seem to take us over fifteen minutes we were so excited although I knew I was going to the field of slaughter yet I felt no fear not one thought of death ever crossed my mi
The History of Mass Spectrometry
This site provides a brief history of the development of mass spectrometry. The works of Thompson and Aston are presented along with a brief overview of the modern evolution of mass spectrometry. This site will be useful for beginning students interested in a historical overview of the field of mass spectrometry. This is an archived version of the site.
Future Directions in the Law Regulating Weaponry in Armed Conflict
A discussion on future directions in the law regulating weaponry in armed conflict to mark the release of Bill Boothby's new book Weapons and the Law of Armed Conflict. Bill Boothby has served for 27 years as an officer in the Royal Air Force legal branch. He developed and implemented the British system for the legal review of new weapons, and formed and led the team charged with conducting these reviews. Tom Porteus is London director of Human Rights Watch.
Soil community analysis along a salt gradient using denaturing gradient gel electrophoresis of PCR-a
Many studies of hyper saline environments have been performed, mainly on aquatic systems. However, the microbial community in terrestrial thallasohaline environments has not been studied extensively. To our knowledge, this is the first study of a natural terrestrial thallasohaline environment using polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE). We studied the great salt plains (GSP) for this purpose. The GSP is a perfect example of an extreme environment. The
Characterization of mechanical systems with real joints and flexible links
The field of multibody simulations has seen great strides in recent years. Most multibody simulations are carried out under the assumption that the joints involved are ideal. However many real joints are not ideal; they possess some clearance between their components. The existence of these clearances allows for the freeflight motion of some of the joint’s constituent components. This motion is usually followed by an impact leading to load amplification and chaotic motion. The effects of impac
Where the two kingdoms merge: the struggle for balance between national and religious identity among
When the German Reich was created in 1871, it was an artificial construct born of Hohenzollern power projection and not of nationalism. Otto von Bismarck’s Realpolitik used the power of nationalism to unite Germans behind the Kaiser, but also divisively to keep liberals and potential opponents of the Kaiser firmly divided. The Kulturkampf was one such set of policies that attempted to suppress Catholic political authority while dividing Germany’s religious groups against one another. The Kul
Title: funerary stela of Shemrai
VADS Collection: Artworld: Sainsbury Centre for
Description: Round-topped funerary stela.
The lunette has two udjat-eyes with a shen-symbol between. Below the lunette are three rows of hieroglyphs.
Hotep-di-nesw offering formula to Osiris for Shemrai, an architect.
There is a large standing figure of Shemrai on the left, with cropped hair and wearing a wesekh collar and short kilt. There is a small scene to the right in which the small figure of his son Senenu similarly dressed and standing before an offering table, doing the
Conversations with Berkeley Faculty: Michael Nacht (1/9/03)
Conversations with History Presents Faculty Research at the University of California, Berkeley Michael Nacht Dean and Professor of Public Policy, UC Berkeley "Changing Paradigms in National Security Policy" January 9, 2003. A complete transcript is available. Professor Nacht teaches and writes in the fields of U.S. national security and foreign policy, and on management strategies for public organizations. He was a founding coeditor of the journal International Security, and he served in the
How the Body Works : Breathing
This is a very brief (47 seconds) video that explains how our lungs expand to receive oxygen.
Global Cohort: Elsa Rosyidah
Elsa Rosyidah from Indonesia talks Feb. 2, 2012, about the U.S. Department of State and Goldman Sachs 10,000 Women Entrepreneurship Partnership Global Cohort at Thunderbird School of Global Management. http://www.thunderbird.edu
Introduction to Ground Subsidence - Powerpoint Presentation
Introduction to Ground Subsidence Powerpoint - Part 1 of Ground Subsidence and Slope Stability. GEESOER