OC userin Chemistry·12 Nov 201769. What are the products of each aromatic substitution reaction? H H + Br2 FeBry febrer CH3 + CH3-CH-a Ald;
OC userin Physics·14 Nov 20175.14. Three sleds are being pulled horizontally on frictionless horizontal ice using horizontal ropes (Fig. E5.14). The pull is of magnitude 190 N. Find (a) the acceleration of the system and (b) the tension in ropes A and B. Figure E5.14 30.0 kg 20.0 kg 10.0 kg Pull
OC userin Physics·14 Nov 201746. Calculate the free energy change for this reaction at 25°C. Is the reaction spontaneous? (Assume that all reactants and products are in their standard states.) 2 Ca(s) + O2(g) →→2 Ca(s) AHX = -1269.8 kJ; ASix = -364.6J/K
OC userin Physics·13 Nov 20172.60 . A subway train starts from rest at a station and acceler- ates at a rate of 1.60 m/s- for 14.0 s. It runs at constant speed for 70.0 s and slows down at a rate of 3.50 m/s- until it stops at the next station. Find the total distance covered.
OC userin Physics·12 Nov 20171.85 .. You are given vectors A = 5.0î – 6.5ị and B = 3.5î – 7.0ſ. A third vector, Č, lies in the xy-plane. Vector C is perpendicular to vector A, and the scalar product of Č with B is 15.0. From this information, find the components of vector C.
OC userin Chemistry·13 Nov 2017121. A 0.25-mol sample of a weak acid with an unknown pk, was combined with 10.0 mL of 3.00 M KOH, and the resulting solu- tion was diluted to 1.500 L. The measured pH of the solution was 3.85. What is the pKof the weak acid?
OC userin Physics·12 Nov 201725.21 . A current-carrying gold wire has diameter 0.84 mm. The electric field in the wire is 0.49 V/m. What are (a) the current car ried by the wire; (b) the potential difference between two points in he wire 6.4 m apart; (c) the resistance of a 6.4-m length of this wire?
OC userin Physics·12 Nov 20171.8. While driving in an exotic foreign land, you see a speed limit sign that reads 180,000 furlongs per fortnight. How many miles per hour is this? (One furlong is g mile, and a fortnight is 14 days. A fur- long originally referred to the length of a plowed furrow.)
OC userin Accounting·14 Nov 2017EXERCISE 5-17 Break-Even and Target Profit Analysis (L05-4, L05-5, L05-6] Outback Outfitters sells recreational equipment. One of the company's products, a small camp stove, sells for $50 per unit. Variable expenses are $32 per stove, and fixed expenses associated with the stove total $108,000 per month. Required: 1. Compute the break-even point in unit sales and in dollar sales. 2. If the variable expenses per stove increase as a percentage of the selling price, will it result in a higher or a lower break-even point? Why? (Assume that the fixed expenses remain unchanged.) 3. At present, the company is selling 8,000 stoves per month. The sales manager is convinced that a 10% reduction in the selling price would result in a 25% increase in monthly sales of stoves. Prepare two contribution format income statements, one under present operating con- ditions, and one as operations would appear after the proposed changes. Show both total and per unit data on your statements. 4. Refer to the data in (3) above. How many stoves would have to be sold at the new selling price to yield a minimum net operating income of $35,000 per month?
OC userin Chemistry·13 Nov 201758. Which buffer system is the best choice to create a buffer with pH = 9.00? For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. HF/KF HNO2/KNO2 NH3/NH4Cl HCIO/KCIO
OC userin Chemistry·10 Nov 201794. The solubility of copper(I) chloride is 3.91 mg per 100.0 mL of solution. Calculate Ksp for CuCl.
OC userin Accounting·12 Nov 2017PROBLEM 2-21 Cost Classification (L02-1, LO2-3, L02-4] Listed below are costs found in various organizations. 1. Property taxes, factory. 2. Boxes used for packaging detergent produced by the company. 3. Salespersons' commissions 4. Supervisor's salary, factory. 5. Depreciation, executive autos. 6. Wages of workers assembling computers. 7. Insurance, finished goods warehouses. 8. Lubricants for production equipment. 9. Advertising costs. 10. Microchips used in producing calculators. 11. Shipping costs on merchandise sold. 12. Magazine subscriptions, factory lunchroom. 13. Thread in a garment factory. 14. Billing costs. 15. Executive life insurance. 16. Ink used in textbook production. 17. Fringe benefits, assembly-line workers. 18. Yarn used in sweater production. 19. Wages of receptionist, executive offices. Required: Prepare an answer sheet with column headings as shown below. For each cost item, indicate whether it would be variable or fixed with respect to the number of units produced and sold; and then whether it would be a selling cost, an administrative cost, or a manufacturing cost. If it is a manufacturing cost, indicate whether it would typically be treated as a direct cost or an indirect cost with respect to units of product. Three sample answers are provided for illustration. Variable or Fixed Selling Cost Administrative Cost Manufacturing (Product) Cost Direct Indirect Cost Item Direct labor ............. Executive salaries .. Factory rent ........... TI TI
OC userin Chemistry·10 Nov 201715. Explain how a chemical reaction occurs according to the coll- sion model. Explain the meaning of the orientation factor in this model.
