Column1 Spring Constant(N/m) Orange 1416.809091 ±193 Light Blue 1387.899091 ±190 Green 1421.951364 ±193 Using that force to find the spring constant from the tweaked equation mentioned before. Conclusion This experiment confirms the relationship of the spring constant between the objects when projected with a certain field of force. Even with their difference in mass, each ball showed similar results when launched with 620 ±80N proving that spring constant has a relationship between if experimented properly. The spring constant of the rubber band in the slingshot I used is on average 1408 ±192(N/m) when the force’s average on each ball is around 620 ±80N. I feel that even with the uncertainties in the numbers from numbers that my answer still contains scientific proof on determining the spring constant.
Final Practical Report Module –Atomic Force Microscopy for Bionanoscience (PHYC40560) Student name – Bikramjit Bhattacharjee (Student ID -14201299) Date of the experiment – 14/11/14 Date of report submission – Amplitude modulation AFM imaging of amyloid β-protein fibrils in a liquid environment Abstract – The Atomic Force Microscope (AFM) can be used to image and assess mechanical properties of various samples in a range of environments mirroring the physiological conditions for biological samples. The aim of this experiment was to use the AFM in the amplitude modulation (/tapping) mode  to image amyloid β-protein (25-35) (Aβ(25-35))fibrils, in a liquid environment (milli Q) water which was used as the imaging buffer. The experiment was
Wang (2000) study crystal and surface structures of nanophase materials by using transmission electron microscope .because it will give physical and chemical properties of the materials. TEM is demonstrated for characterizing and measuring the thermodynamic, electric, and mechanical properties of individual nanostructures, from which the structure−property relationship can be registered with a specific nanoparticle/structure. References: Curry , A., H. Appleton and B. Dowsett . 2006 Application of transmission electron microscopy to the clinical study of viral and bacterial infections: Present and Future . Micron , 37 (2006):
2. Summary of the simulations performed on the Wigley hull 4. Results and discussion: 4.1 Drag Coefficients: The steady state values for the drag forces were obtained by observing the dependence of the drag force in time, identifying the instants during which the forces are oscillating around a fixed value, and time-averaging the forces throughout that time range. Examples of the convergence and averaging on Wigley hull cases are shown in Figure 8 and Figure 9. Fig.
Abstract This paper presents the results of a study on the edge chipping thchickness in rotary ultrasonic machining of advance ceramics. The investigation is conducted by an paractical approach to understand the effect of support length on edge chipping size. The investigation results showed that edge quality can be improved by increasing the support length Introduction Since ancient times, the improvements in technology and applications of ceramics have progressively increased. Ceramics have played an important role in the progress of modern industries. An engineer can not imagine a world without ceramic because of its diversity and its use in fields; Electronics Telecommunications, Electricity, construction brick, cement, tile and glass, artificial bones, furnace, Pollution Control.
the film. The surface morphology of the films was observed using atomic force microscopy (AFM) and scanning electron microscopy (SEM). The magnetic properties of the films were analyzed using magnetic force microscopy (MFM). RESULTS AND DISCUSSIONS The room temperature XRD pattern for the annealed film with the thickness of 135 nm and 260 nm showed the coexistence of both austenite and martensite phase. While increasing the film thickness to 595 nm, L21 cubic structure is observed.
The peak observed in FTIR at 1560 cm-1, which is attributed to the deformation mode of amino group in APS forming hydrogen bond with silanol, confirm this observation. The grafting of surface modified nano-silica particles on the ramie fiber introduced a nano-scale fiber surface roughness . A schematic representations of ramie fiber treated with silane/nano-silica are shown in Fig. 6a and
The resulted response surfaces as a function of temperature and velocity for twist and bow are presented in Fig. 8 and Fig. 9, respectively. The results show that increasing the initial temperature and decreasing the velocity results to more twist; but the velocity effect on the bow formation is not considerable. 5.3.
Application of quantum electron tunneling Scanning tunneling microscopy: Scanning tunneling microscope is a device used to map to topography of a material at atomic level. It works by running a sharp tip which is only a single atom thick over the surface of material. The tip voltage is higher than material. This voltage allows tunneling current to flow from electrons that tunnel from the surface of material to tip of material through potential barrier. By measuring the amount of current the microscope can resolve where the atoms are on the surface of the material.
A sharp drop in reflected signal is observed at angle өres . Sensing Principle of SPR: Performance Parameters: The sensing principle of SPR sensors is based minimum reflectance For a given frequency of the light source and the dielectric constant of metal film one can determine the dielectric constant of the sensing layer adjacent to metal layer by knowing the value of the resonance angle . The resonance angle is determined by using angular interrogation method. The resonance angle is very sensitive to variation in the refractive index (or, dielectric constant) of the sensing layer. Increase in refractive index of the dielectric sensing layer increases the resonance angle.