Lesson 13.6 Changes of physical state: * necessary to draw a temperature-energy graph to see the change in temperature with a constant application of heat Heat of fusion - the amount of heat required to melt 1.00 g of substance. substance changing from a solid to a liquid. Heat of vaporization - the amount of heat required to vaporize 1.00 g of a substance. substance changing from a liquid to a gas. heats of vaporization and condensation are equal.
The distance between the forces is given by the Coulombs law through the use of the formula F=kq1q2/r2.0.1newtons = 8.99*109*3.2*10-6*7.7*10-7/r2 R= 555.78 Answer to question 3 • Potential difference between the two plates is equal to velocity which is equal to 6.0*106m/s • Force = mass *acceleration = 1.4*10-13*6.0*106 = -8254 nektons The speed of the particles are computed by the formula V=ED. This is equal to 8.5*10-6*0.15. This is equal to 84.1 Answer to question 4 Voltage = current *resistance. This implies that in this case while V is 5.0 and resistance is 1.0*103, current will be equal to 5/1.0*103, = 500 amps B the direction of the conventional current provides the electric charge movement from the positive side of the battery to its negative side as in indicated in the diagram below Answer to question 5 • This section focuses on the equivalent resistance of a circuit. The equivalent resistance will be equal to (5.0*102+1.00*103)2.
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.
Homework Unit 57 Section 7 1. What friction rate should be used to size a duct for a static pressure drop of 0.1 in wc if the duct has a total equivalent length of 150 ft? (57.10) 2. What size metal duct should be used to deliver 170 CFM with a pressure drop of 0.15 in wc if the total equivalent length of 130 ft? (57.10) 7 in.
Their values may equal the stoichiometric coefficients in the balanced equation. b. Their values may or may not equal the stoichiometric coefficients in the balanced equation. c. Their values must be experimentally determined. d. Their values get larger as the temperature is increased.
2. Explain what relationship exists between the pressure and volume of a gas (assuming a constant temperature), based on your collected data. Answer: The relationship between Pressure and Volume is inversely proportional. As one decrease, the other increases. P1V1=P2V2 3.
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
Speed of Sound A. Objective The objective of this laboratory was to measure the speed at which sound was traveling through the air, using the resonance of longitudical waves. B. Equipment Used * Tall glass of water * PVC Pipe, 10 in. * Tape measure, 3 m * Mercury thermometer * Tuning fork, 384 Hz * Marker pencil * Block of wood C. Data Table 1: Tuning fork frequency (Hz) | Length, L Water level to top of the tube (m) | D= diameter of tube (m) | Wavelength=4(L+0.3d)(m) | Room temperature (degrees C) | 384 | 0.218 | 0.020 | 0.896 | 24 | D. Calculations A.
As you would already know that exothermic reactions tend to release quite a large amount of heat, so when the reaction mixture gets very warm, a very hot exothermic reaction begins. [2] How industry controls the risks of thermal runaway reaction/ Protective measures used for consequences of runaway reactions. “Protective measures include emergency venting or relief systems, inhibition and containment.”[3] Bibliography: 1) http://writepass.co.uk/journal/2012/11/thermal-runaway-reactions-are-characterised-by-progressive-increases-in-the-rate-of-heat-generation-temperature-and-pressure/ 2) http://wall-paper3.blogspot.co.uk/2011/12/why-do-you-think-thermal-runaway.html 3)
-Medium range frequencies can be heard at lower intensities. Sound at low frequencies (below 50 Hz) and high frequencies (above 12,000 Hz) must relatively intense in order to be heard. -Intensity and distance have an inverse square relationship. formula: P/4πr2 -Frequency determines pitch and intensity (amplitude) determines volume. relative intensity-relates the intensity of a given sound to the intensity at the threshold of hearing (decibel level); a difference in 10 dB means the sound doubles forced vibrations-when vibrations are transferred from one object to another natural frequency-frequency at which something vibrates resonance-when the frequency of a force matches the natural frequency of vibration of a system; sound will transfer at a greater intensity Section 13-3: Harmonics -In a vibrating string, a variety of standing waves can occur (two waves of the same frequency, wavelength, and amplitude travel in opposite directions and