The value of the force constant for the spring is most nearly (A) 0.33 N/m (B) 0.66 N/m (C) 6.6 N/m (D) 33 N/m (E) 66 N/m 4. A block of weight W is pulled along a horizontal surface at constant speed v by a force F, which acts at an angle of with the horizontal, as shown above. The normal force exerted on the block by the surface has magnitude (A) W F cos (B) WFsin (C) W (D) W + Fsin (E) W + Fcos 5. When the frictionless system shown above is accelerated by an applied force of magnitude the tension in the string between the blocks is (A) 2F (B) F (C) F (D) F (E) F 6. A push broom of mass m is pushed across a rough horizontal floor by a force of magnitude T directed at angle as shown above.
Abstract Sliding filament theory of muscle contraction suggests existence of an optimal muscle length associated with maximum stimuli-generated tension. This hypothesis is tested in vitro by measuring muscle tensile response to fixed voltage stimulations under length alterations of the gastrocnemius of Xenopus laevis. Muscle length is mechanically varied by shrinking or extending and an attached force transducer records the tension generated by the fixed stimuli. Our results indicate greatest tensile response of about 3.2 N when muscle length is 30 mm. The response diminishes as deviations from this optimal length increases.
Experiment 1: Pressure, Temperature, and Velocity Measurement Objective: The objective of this experiment is to determine the pressure and density of laboratory air, calibrate a pressure transducer and scannivalve, then determine the test section speed as a function of fan speed using three methods of velocity measurement. Equipment: Absolute pressure transducer, digital thermometer, pressure transducer (voltmeter), micromanometer, scannivalve, Pitot tube, low-speed wind tunnel. Part 1: Measurement of Atmospheric Pressure and Density 1. Read the barometer and wind-tunnel thermocouple. 2.
(57.10) 7 in. 3. What friction rate should be used to size a duct for a static pressure drop of 0.1 in wc if the duct has total equivalent length of 50 ft? (57.10) 0.2 4. What size metal duct should be used to deliver 270 CFM with a pressure drop of 0.15 in wc if the total equivalent length is 80 ft?
(0.5 points) 3. What is diversification? (0.5 points) 4. What is risk tolerance? (0.5 points) 5.
Viscosity can be affected by three main factors, Firstly, the higher the temperature, the lower the density of the magma, causing it to flow more easily. Secondly, the greater the amount of dissolved gases in the magma, the less viscous it will be, and lastly the higher the silica content, the more viscous it will be. Thicker, more viscous magma has a greater potential for explosive eruptions and therefore represent the greatest potential hazards. The thickest type of magma is known as Acidic Magma. Its relatively low temperature, high silica content and leads to blockages and powerful eruptions.
Finally, we analyze the errors in both parts of the lab by propagation by substitution and compare the theoretical-experimental values using errors. III. Results: The theoretical buoyant forces for the sphere, the small cylinder, the block, and the big cylinder are 0.297N, 0.131N, 0.369N, and
The fork was held horizontally over the pipe and the pipe was moved up and down in the water. At the highest pitch of sound the pipe was held in place and the distance between the surface of the water and the top of the pipe was recorded. Data: Data Table 1 | Tuning fork frequency(ƒ),Hz | Length, L(water level to top of pipe) | Diameter of pipe, d | λ=4(L+0.3d) | ExperimentalV= ƒ λ | Room Temperature, Celsius | 384 | | 0.025cm | | | 23 degrees Celsius | Sample Calculation: Theoretical Speed of Sound: v = 331.4 + 0.6TC m/s v= 331.4+0.6(23) v=345.2 Percent Error: % error = experimental value – theoretical value × 100/theoretical value % error = 149.76 – 345.2 × 100/345.2 % error =56.6 Results: Data Table 1 | Tuning fork frequency(ƒ),Hz | Length, L(water level to top of pipe) | Diameter of pipe, d | λ=4(L+0.3d) | ExperimentalV= ƒ λ | Room Temperature, Celsius | 384 | 0.09 m | 0.025m | λ=4(L+0.3d)=4(0.09+0.3x0.025)=4(0.0975)=0.39 | V= ƒ λ=384(0.39)=149.76 | 23 degrees Celsius | Conclusion: There could be many errors that could lead to the percent error calculated. One of which could be the position of either the tuning fork or the pipe. Another could have been the movement of the pipe up and down in the
This is just to avoid the hot steel damaging the table. Now turn the fan on and face it towards the block of steel. The fan will cool the steel down. Using the digital thermometer record the temperature of the block of steel every minute. These temperatures are the actual temperature.
Natural gas also isn’t high in nitrogen oxide or sulfur dioxide. It is more environmentally friendly to extract natural gas than burn coal. Hydraulic fracturing is the use of fluid and material to create or restore small fractures in a formation in order to stimulate production from new and existing oil and gas wells. This creates paths that increase