PPT-Surface Forces in Nanomechanical

Systems Living on the Edge J Provine Stanford University 20120111 Fermilab Colloquium Outline Scaling in the micronanometer range Introduction to several surface effects Nanoelectromechanical. AFM. Introduction. high-resolution type of scanning probe microscopy, with demonstrated resolution of fractions of a nanometer, more than 1000 times better than the optical diffraction limit. . How It Works. viscosity. : a liquid’s resistance to flow . -- high viscosity = . high resistance to flow . -- depends on IMFs . -- . as temp. increases, viscosity decreases . Molecules on a. liquid’s surface . Intermolecular Forces. Intramolecular and Intermolecular Forces. We have just been discussing the . covalent bond. - the force that holds atoms together making molecules. . We have also talked about the ionic bond. These are . LEQ: How do constructive forces build up the Earth while destructive forces wear down the Earth?(Q). Destructive Forces. Sometimes the earth’s surface changes . VERY QUICKLY. For Example:. Earthquakes. ~A short lived induced dipole . dipole. attraction . between atoms that don’t normally have a dipole moment.. An orbital is an area of probability of an electron. . The electron does not have a uniform motion, at least we don’t think it does. We don’t know what the motion of an electron is. How does the Earth Change?. Geology. In your Science journal record the UEQ. How does the Earth Change?. Activating Strategy:. Your lab group will have the opportunity to use your observation skills and inferring skills to predict the contents of three film canisters.. Review -- Muscle Elastic and Active Forces. Static Measurement of Compliance Curves. The Compliance of an Air-Filled Lung. The Compliance of a Saline-Filled Lung. Tissue Elastance in the Lung. Compliance of the Lung In Different Disease States. What is pressure?. Pressure is the force per unit area that is applied on the surface of an object.. Chapter 12: Forces and Fluids. Calculating pressure. Pressure increases if the force applied increases and decreases if the area of contact increases.. What types of forces . do you already know?. Different types of forces . Forces are usually divided into . two . types. . . C. ontact . forces. . occur . because of physical contact between objects. . , . Institut für Physik. Contact: . yong.lei@tu-ilmenau.de. stefan.boesemann@tu-ilmenau.de. ; liying.liang@tu-ilmenau.de. Office: Gebäude V 202. , . Unterpörlitzer. Straße 38 (. tel. : 3748). www.tu-ilmenau.de/nanostruk. Winds and Forces Atmospheric Sciences 101 Winter 2019 Wind: the movement of air in the atmosphere Why are there winds ? Differences in pressure between locations Why are there pressure differences? J. . Badshah. SGIDT, Patna. (Bihar Animal Sciences University, Patna). Measurement of pressure. Measurement of Gauge Pressure. Bourdon Gauge: . It consists of a tube of elliptical cross section, bent in the form of a circular arc. It is fixed to the frame at one end and the other end is attached to a lever arrangement consisting of a link and a pointer on a scale.. 26.6.12. Surface Tension. Temperature. Solute. Solutes can have different effects on surface tension depending on their structure:. Little or no effect, for example sugar. Increase surface tension, inorganic salts. At surface, some forces are missing, pulls molecules down and together, like membrane exerting . tension. on the . surface. Pressure increase is balanced by surface tension, . s. . surface tension = magnitude of tension/length.