(ii) The total length of the ruler is 80 cm. The 50 g mass is hung from the 8 cm mark on the ruler. Calculate the mass of the ruler. Show all your working.

use the diagram.​

The heat of mixing data for the n-octanol + n-decane liquid mixture at atmospheric pressure are approximately fit by: h = xx (A + B(x - x))]/mol Where A =-12,974 +51.505 T and B = +8782.8-34.129T with T in K and x being the n-octanol mole fraction. i. Compute the difference between the partial molar and pure component enthalpies of n-octanol and n-decane at x = 0.5 and T =300K. ii. Plot h vs. x at 300K. Show the relationship between the plotted data and your answers in part a) by placing your value for n-octanol at x = 0.5 and determining H & H iii. Using the plot, estimate values for h infinity and hinfinity A silver conductor has a resistance of 25 at o'c. Determine the temperature coefficient of resistance at o'c and the resistance at -30 C. A 675-meter bike trail passes through forest and meadows. There are six legs of the trail that cut through meadows: two legs measure meters, three legs measure 52.25 meters, and one leg measures 32 meters. The rest of the trail passes through forest. How many meters of the trail pass through the forest? The student started with 0.765 mmoles of Reactant A and 1.00mmoles of Reactant B. The student obtained 0.600 mmoles of product.Calculate the % yield for this reaction. solve with quadratic equation (7-3x)=9/16 What volume of the diluted solution contains 13.8 g of NaCl ? (Hint. Figure out the concentration of the diluted solution first.) Express your answer using two significant figures. Which of those are solutions? Check all that apply. nitrogen gas hexane table salt air distilled water seawater You decide to add to your data table by conducting the same subsitution reactions with another alkyl halide: 3-chloro-1-butene.Your data shows that 3-chloro-1-butene reacted faster than 2-chlorobutane in an SN1 reaction. Suggest an explanation for this rate difference. A discharge of 60 m/s is flowing in a rectangular channel. At section (1), the bed width= 10.0 m and the water depth = 4.0 m. The channel bed width is gradually contracted to reach a bed width of 5.0 m at section (2). Within the contracted zone, the bed level is gradually raised. Find analytically the minimum rise in bed level at section (2) so that the flow is critical. need help all information is in the picture. thanks! A 69 kV 3-phase power distribution line is suspended from grounded steel towers via insulators with a BIL of 350 kV and protected by a circuit breaker. The neutral of the transmission line is solidly grounded at the transformer, just ahead of the circuit breaker, but the tower has a resistance of 30 2 to ground. (i) Calculate the peak voltage across each insulator under normal conditions. [10%] (ii) Suppose that, during an electrical storm, one of the towers is hit by a bolt of lightning of 20 kA, lasting a few microseconds. Describe the sequence of events during the strike, and its immediate aftermath. [20%] (iii) Strikes of this magnitude are fairly common. What could be used to replace the circuit breaker to ensure the power outage is minimised? [5%] (iv) Give two applications of high voltage d.c. power links in power distribution networks. Establish the identity. \[ (1+\sec \theta)(1-\sec \theta)=-\tan ^{2} \theta \] Multiply and write the left side expression as the difference of two squares. multinational banks are often not subject to the same regulations as domestic banks a. none of the options b. there may be reduced need to publish adequate financial information c. there may be increased need to publish adequate financial information d. the requirements to publish adequate financial information are the same In the body, fat fills what role? A. It's necessary for proper carbohydrate digestion B. It's necessary for the absorption of dietary fiber C. it provides insulation against cold temperatures D. it stimulates the production of vitamins and minerals Show how you would accomplish the following synthetic conversions. 1-bromobutane 2-bromobutane (a) but-1-ene (b) but-1-ene (c) 2-methylcyclohexanol 1-bromo-1-methylcyclohexane (d) 2-methylbutan-2-ol -2-bromo-3-methylbutane Here are the ingredients in your first recipe:Banana Cupcakesmakes 10 cupcakes1 cup granulated sugar1/2 cup vegetable oil1 large egg4 tablespoons sour cream2 medium-sized ripe bananas, mashed1 1/2 cups all-purpose flour1 teaspoon baking soda1/8 teaspoon salt1 teaspoon vanilla extractpinch of nutmegYou will use the recipe above to answer the following questions:1. This recipe serves 10, but you need to serve 30. What number will you need to multiply the amount of each ingredient by to adjust the recipe? 2. How did you determine this number?3. How much vegetable oil do you need for 30 cupcakes?4. How much flour do you need for 30 cupcakes?5. What is the difference in the amount of vanilla extract you would need for 30 cupcakes?6. What is the difference in the amount of salt you would need for 30 cupcakes?In the real world, even though you make adjustments to a recipe to accommodate the number of people you need to serve, you sometimes round the amount of an ingredient instead of using an exact amount. Which ingredient would it make more sense to round rather than coming up with the exact amount? Why? Analysis of Receivables Method At the end of the current year, Accounts Receivable has a balance of $895,000; Allowance for Doubtful Accounts has a credit balance of $8,000; and sales for the year total $4,030,000. Using the aging method, the balance of Allowance for Doubtful Accounts is estimated as $31,200. a. Determine the amount of the adjusting entry for uncollectible accounts. b. Determine the adjusted balances of Accounts Receivable, Allowance for Doubtful Accounts, and Bad Debt Expense. 000 Accounts Receivable Allowance for Doubtful Accounts Bad Debt Expense c. Determine the net realizable value of accounts receivable. bierderlack has a policy that states that people who are hired for entry-level clerical positions must have a high school diploma or the equivalent. when applications are received for entry-level clerical positions, applicants who do not have a high school diploma or an equivalent are automatically rejected. this is an example of . a. a personal grudge b. a programmed decision c. a nonprogrammed decision d. an insignificant decision e. poor managemen We have a dataset about bottles of wine, with Wine Type (Red, White, Rose) and measurements of chemical analysis of each wine. Our training set has 900 rows with equal numbers of each type of wine, and our validation set has 500 rows. We run an SVM model. We see that the generated model predicts that all the wine is Red. We can conclude thatA. The validation set has only Red wineB. We should have used a Cluster analysis modelC. The training data was not balancedD. The SVM kernel cannot distinguish between wine types 1. Identify the meaning of this lane marking: Yellow Broken Line.O A. Traffic is going in opposite directions and it is safe to pass a vehicle.O B. Traffic is going in same direction and it is safe to pass a vehicle.O C. Traffic is going in opposite directions and it is NOT safe to pass a vehicle.O D. Traffic is going in same direction and it is NOT safe to pass a vehicle.2. If you cannot see at leastO A. 200 feetO B. 50 feetO C. 100 feetO D. 60 feet2 What isfeet in either direction down an intersecting road, it is a blind intersection. Transcribed image text:An orthogonal basis for A, 102616248121681532251103220, is 1026162, 33303, 60660, 05005. Find the QR factorization of A with the given orthogonal basis. The QR factorization of A is A=QR, where Q= and R=