Numerade

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Which of the following algorithms enables two users to securely exchange a key that can then be used for subsequent symmetric encryption of messages? A Elliptic curve cryptography B ElGamal C RSA D Diffie Hellman

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Calculate the hydronium ion concentration in a solution that is 2.0 x 10-4 M in aniline hydrochloride, C6H5NH3Cl.

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A unit of length is degrees Celsius. Group of answer choices True False

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Which of the following contacts does not need to be in writing in Tennessee? A contract to purchase your friend's car for $400 A lease with your landlord that lasts over a year The sale of your home A contract to paint someone's home for $10,000

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3. (a) What are the factors that made polyethylene an increasing demand product? (5 marks) (b) List the two most widely used grades of polyethylene (2 marks) (c) List the differences between your answer in 3b above (3 marks) (d) List two reactors used for polymerizing ethylene (2 marks) (e) Describe how heat is being removed by your answers in 3d above (2 marks) (f) What can be done to vary the crystalinity of polyethylene? (2 marks) (g) State the properties of your answer that makes it suitable for the function in $ 3 \mathrm{f} $ above (2mks) 4. (a) Mention the product formed from the oxidation of ethylene, propylene and butene ( $ 3 \mathrm{mks} $ ) (b) Describe the alternative route of producing acrylic esters via beta-propiolactone intermediate (4 marks) (c) List three products in which acrylic resins are applied (3 marks) (d) Mention the name of polymers formed when acrylonitrile is copolymerized with (i) butadiene and styrene (ii) styrene (2 marks) (e) List 4 properties of polypropylene products (2 marks) (f) What properties makes polypropylene extensively used in automobile? (1 mark)

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Find the equation of the tangent plane to $f(x, y) = x^2 - 2xy + 5y^2$ having slope 2 in the positive x direction and slope 6 in the positive y direction.

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Inventory data: 30 units @ $4.00 each 120 units @ $4.30 each 60 units @ $4.20 each 90 units @ $4.40 each Inventory Purchase: 17 units 25 units A) $846 B) $421 C) $863 D) 47 Turner Corporation returned $150 of goods originally purchased on credit from Morgan as: A) Accounts Payable $150 B) Purchase Returns and Allowances $150 C) Inventory $150 D) Accounts Payable $150 Jamison, Inc. is a regional air cargo carrier. Jamison made a $4,500 improvement of its airplanes. If Jamison's accountant expensed this amount, which of the following statements is true? A) The entry will overstate the balance sheet for the year B) The entry will improperly understate net income for the year C) The entry will improperly overstate net income for the year D) The entry is the correct treatment Equipment costing $210,000 was destroyed when it caught on fire. At the time of the fire, the accumulated depreciation on the equipment was $84,000. An insurance claim for $240,000 was received based on the replacement cost of the equipment. To record the insurance proceeds and the disposition of the equipment, will result in: A) A credit to the Accumulated Depreciation account for $84,000 B) A gain on disposal of $30,000 C) A gain on disposal of $114,000 D) A credit to the Equipment account of $126,000

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2. For a flow, the velocity field is given by equation (2): $\vec{v} = 5x^2\hat{i} - 20xy\hat{j} + 100t\hat{k}$, (2) where $t$ is time in seconds. a. Is the flow steady or transient? (5 points) b. Obtain an expression for the acceleration (20 points) c. Determine the acceleration at the location (1,3,3) (5 points) d. Determine the velocity at the location (1,3,3) (5 points)

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Problem 6.1. Capillary rise Under the influence of surface tension $\gamma$ (with units of kg.s$^{-2}$), a liquid rises to a height $H$ in a glass tube of diameter $D$ (see figure). At steady-state, the height $H$ is a function of $\gamma$, $D$, the density $\rho$, and the acceleration of gravity $g$. D H (a) Explain why you do not expect the viscosity $\mu$ to play a role. (b) Using dimensional analysis, show that the relation between $H$ and the other variables can be expressed as a relation of the form $\pi = f(\pi_1)$ between two dimensionless parameters $\pi$ and $\pi_1$. Use $H$ and $\gamma$ to construct these parameters. (c) A full solution of the problem shows that $H = \frac{4\gamma \cos \theta}{\rho g D}$ (6.1) where $\theta$ is a constant angle known as the wetting angle. Compare this expression to the result you found in part (b) and determine the function $f$.

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4. Winnie the Pooh and Eeyore have the same (prospect theory) value function: v(x) = \sqrt{x}/2 for gains (x > 0) and v(x) = -2\sqrt{-x} for losses (x < 0). The two are also facing the same choice, between (Option S) $2 for sure and (Option G) a gamble with a 50% chance of winning $4 and a 50% chance of winning nothing. They behave according to prospect theory in the sense that they care about their expected (prospect theory) value, not expected utility. However, to simplify the calculation, let as assume that (unlike Hugo) they do not distort probabilities, i.e., their probability weighting function is simply \pi(p) = p for all p. (a) Graph the value function. (b) Winnie the Pooh always \"sees the glass as half full\" and therefore codes all outcomes as gains; that is, he takes as his reference point the worst possible outcome under consideration, which is winning nothing. For Pooh: What is the expected value of S? What is the expected value of G? Which would he choose? (c) Eeyore always \"sees the glass as half empty\" and therefore codes all outcomes as losses; that is, he takes as his reference point the best possible outcome under consideration, which is winning $4. For Eeyore: What is the expected value of S? What is the expected value of G? Which would he choose?

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rodrigo v.