B3.1 (a) Which section of the graph corresponds to the collision between the two cars?  ________________________________________________________ (b) Which section of the graph corresponds to the cars skidding to rest?  ________________________________________________________ (c) What is the speed of the two cars at time = 7 seconds?  ________________________________________________________ (d) What is the distance travelled by car X in the first 4 seconds?  ________________________________________________________ (e) What is the deceleration at BC and CD for car X?
(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?
We know it exists but we can’t find the way to measure it. This lab teaches us how to measure the heat of neutralization when NaOH reacts with HCl. When we mix 50.0mL of 2M HCl with 51.0mL of 2M NaOH, we get 53.94 kJ/mol of heat of neutralization. Introduction: The heat of neutralization is the heat transferred when 1 mole of acid reacts with 1 mole of base. The heat is generally reported in either kilojoule per mole (kJ/mol) or kilocalories per mole (kcal/mol).
o D. The mass is not exactly 255.0 grams, but it is impossible to tell whether the mass is greater than or less than 255.0 grams. 5. 5. You place a mass of 250 grams on the measurement tray of a triple beam balance and then set the rider on the 500 gram beam to the 200 gram mark (the other riders are set to 0 grams). Which of the following statements is true?
2 Basic principles of Kinetics are the “law of inertia” and the “law of energy.” Sir Isaac Newton “The law of inertia” also known as Newton’s 1st law helps explain what happens during blunt trauma. 1. “A body in motion will remain in motion unless acted upon by an outside force.” Example- 2 cars moving at 55 mph, 1 car stops at the red light, car 2 crashes into a wall. An outside force stops the motion of both cars with very different results. 2.
Determine the required diameters of the steel shafts on the pulleys at A and B if the allowable shear stress is tallow = 85 MPa. Figure 4 5. The solid steel shaft DF has a diameter of 25 mm and is supported by smooth bearings at D and E. It is coupled to a motor at F, which delivers 12 kW of power to the shaft while it is turning at 50 rev/s. If gears A, B, and C remove 3 kW, 4 kW, and 5 kW respectively, determine the maximum shear stress developed in the shaft within regions CF and BC. The shaft is free to turn in its support bearings D and E. Figure 5 6.
The apparatus is immersed in a constant temperature bath and is shaken periodically until equilibrium is reached. The “manometer reading” corresponding to the pressure, read on the gage attached to the apparatus, suitably corrected if the air chamber was initially at a temperature other than 100 F , is the Reid vapour pressure. This method provides for partial air saturation of products with Reid vapour pressure below 26 lb, for no air saturation for products above 26lb. PROCEDURE: • Sample transfer • Assembly of apparatus • Introduction of apparatus into bath • Measurement of vapour pressure • Preparation of apparatus for next test OBSERVATION: TEMPERATURE OF GASOLINE = -9 oc TEMPERATURE OF WATER BATH= 37.5 |TIME |PRESSURE READING
Water with three different volumes (100mL, 200mL, and 300mL) was heated and each mass and boiling points were collected. The result yields less precise answer and a percent error of 4.5 % but supports the direct relationship of volume and mass; as mass increases the volume also increases. Same procedure with water, oil was heated but this time. Temperature as intensive property of matter was somehow established in the result and it still need further experiment. Temperature doesn’t change even you take away parts of a sample; it is a characteristic of an object.
From the Moody chart we can see that there are 3 regions which can be considered when attempting to gain a value for f. 1. Laminar flow – f = 16/Re (Up to Re = 2000) 2. For pipe roughness k value less than 0.001, the Blasius equation can d f = 0.0079 Re1/4 3. For high k values or high Reynolds numbers we need to use the d appropriate k value and Reynolds number on the chart. d Example Water with a coefficient of dynamic viscosity of 1.4 x 10-3 NS/m2 flows along a pipe 50mm diameter.