the mass of a chemical. To accomplish this we use direct weighing and weighing by difference on both the centigram and electronic balances. Equipment 1 Centigram Balances 1 Electronic Balance 1 100ml Beakers 5 Copper Slugs 2 Unknown Weights (Label # 1‚ # 2) Procedure Centigram Balance-Direct Weighing Technique 1. Obtain the centigram balance. 2. Add the copper slug to the balance. 3. Record the mass of the copper slug in grams to the observation section. 4. Retain
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Bunsen burner‚ Tums tablet‚ Rolaid tablet‚ and Equate tablet. 2. Weigh antacid tablet as a whole on the electronic scale and record the data. 3. Break up the antacid tablet with the motor and pestle and weight it‚ ensure that it weighs between 0.80 and 1 gram and record the weight of the sample. 4. Add 50 ml of 0.20 M HCl solution to the flask. 5. Add antacid sample to flask. 6. Using the Bunsen burner‚ heat up the flask to just barley boiling and then stop heating. 7. Add
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problem before it gets worse‚ my staff suggested four options. After careful analysis‚ I think that the solution of cancel the planned re-furbishing of the weight rooms is the best. Firstly‚ we had planned to purchase new machines and to install full mirrors as well as to get new sets of weights. However‚ with spot repairs the old weight machines and benches could last another year and the equipment would pose no hazards. Although the option may lead the Fitness Director to wait for another year
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| 4.8 | Step 2: As the sucrose decreases so does the weight. I have found that when you decrease the amount of sucrose it will cause the water to go outward making the bag weigh less. Section 5: Step 1: The lab experimentation did not support my hypothesis because the weight decreased more with the sucrose. Step 2: The specific data that made my hypothesis wrong is the fact that when we added less sucrose the after weight decreased as shown in my graph. Step 3: The results did not support
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of Exercise Affect Respiratory Rate? Hypothesis My experiment will involve sprinting which is a very demanding and fatiguing sport. In order to increase the intensity of it‚ I will be increasing the weight the subject has to carry as he sprints. My hypothesis is that as you increase the weight‚ the respiratory rate will also increase. At rest‚ the average breathing rate for adults is 12-24 breaths per minute and for new born babies it is 30-60 breaths per minute. Younger people breathe more
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items help the reader better understand each person for who they are and help us to understand the physical situation the soldiers are in. In “The Things They Carried”‚ Tim O’Brien describes the item the soldiers carry in their packs and the emotional weight they carry to help give a better understanding of each person. Tim O’Brien discusses some the necessity items that each soldier carries which include “P-38 can opener‚ pocket knifes‚ heat tabs‚ wrist watches‚ dog tags‚ mosquito repellant‚ chewing
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To alleviate this problem‚ many pilots have started attaching random lead weights to the back of the helmet. Find the appropriate weight that would best balance the head and minimize neck fatigue. Assumptions: (a) center of gravity (cg) of goggles is 8 inches in front of neck pivot point; (b) goggles weigh 2lbs.; (c) max. volitional neck torque is 480 in lbs.; (d) cg of lead weight is 5 inched behind neck pivot point‚ (e) bare helmet weighs 4 lbs
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water. Wear safety glasses. Procedure : Weight out about 1.5 g of sodium carbonate and place in a warm oven and leave to dry. (We do not do this – but WHY must you if you had time?) Accurately weight out 1.3g of sodium carbonate using the method of “weighing by difference”. Record the mass of Na2CO3 used to at least 2 decimal places. Weigh boat first‚ record value‚ then add Na2CO3‚ record value. The difference should be 1.3g. Operation Mass of weight boat + sodium carbonate Mass of weigh boat
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will decrease as more weight is added on top of the cart. This is because the more weight that is placed on the moving vehicle/object‚ the more downward force is produced. This would increase the friction between the wheels of the cart and the ramp’s surface. The increase in friction would slow down the moving object (cart). Apparatus Trolley/cart- this is essentially a wooden block with wheels and a rubber end‚ to provide the collision with a cushion upon impact. Weights- these were added to
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for the Pb – Sn system. Calculate a) What phases form when the alloy is cooled to 250 oC? [2] b) Determine the weight percent of the phases that form at 250oC. [3] c) The weight percent of the eutectic structure and proeutectic alpha just below the eutectic temperature (183oC) and the weight in kilograms of these phases. [5] d) The weight in kilograms of alpha‚ (α)‚ and beta‚ (β)‚ formed by the eutectic reaction.
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