862. How do wave energy devices handle varying wave conditions?

858. How does wave height impact energy generation?

A civil engineering firm asked to check the dimensions of a proposed dam to be constructed on a river. The dam would have a height of m, width of m and a thickness of m. The dam is to be constructed of concrete with a density of kg−3. The coefficient of friction between the base of the dam and the riverbed is = 0.8. A hydraulic engineer needs to Sketch the dam showing all forces acting on it to aid calculating the required; i) thickness to prevent sliding ii) to prevent tipping. Taking R as the normal reaction from dam’s contact with the impermeable surface, and S is the frictional force resisting sliding. Evaluate the ability of the subsurface wall to resist the forces exerted by liquid.

A communication system is to consist of n seemingly identical antennas that are to be lined up in a linear order. The resulting system will then be able to receive all incoming signals????and will be called functional????as long as no two consecutive antennas are defective. If it is turns out that exactly m of the n antennas are defective, what is the probability that the resulting system will be functional?

SECTION B - DEFINED MARK QUESTIONS QUESTION 4 (Answer TWO of the following questions in the space provided on each sheet. Write the final answer in the block at the bottom of the sheet. Each question is worth 5 marks.) dent Number: Bar

is pinned at

to a second bar

which is able to slide freely through a collar at

, which is fixed to the ground but can pivot to allow motion of bar

. At the instant shown, bars

and

are angled at

to the horizontal and length

is

. Determine the resultant velocity of end

of bar

if

. Hint: length

varies.

CHM 2045L-Heat Effects and Calorimetry Prelab: Heat Effects and Calorimetry Name: Amirata Samaeiun Class period:

Date:

Show calculations and be mindful of significant figures for full credit. A sample of a metal with a mass of

that might be gold was warmed to

. It was put into a Styrofoam calorimeter where the

of water present was initially at

. At equilibrium, the final temperature was recorded to be

. Answer the following questions: (Continued next page)

An independent refiner who is exposed to the risk of increasing crude oil costs and falling refined product prices runs the risk that his refining margin will be less than anticipated. He decides to lock-in the current favorable cracking margins, using the 3:2:1 crack spread strategy, which closely matches the cracking margin at the refinery. It means that 3 contracts of crude oil make 2 contracts of gasoline and 1 contract of ULSD. On September 15, the refiner decides to use the 3:2:1 crack spread to hedge. December gasoline futures are traded at $1.60 per gallon and one December ULSD futures are traded at $1.70 per gallon, and November crude oil futures are traded at $50.00 per barrel. 1) What is the Crack spread in the futures market? How should the refiner hedge in September? One month later, on October 15, the refiner purchases the crude oil at $60.00 per barrel in the spot market for refining into products. At the same time, he also sells gasoline from his existing stock in the cash market for $1.70 per gallon and diesel (ULSD) fuel for $1.80 per gallon. Since the futures market closely reflects the cash market, November crude oil futures are also selling at $60.00 per barrel. December gasoline futures are also trading higher at $1.70 per gallon and December ULSD futures are trading at $1.80 per gallon. 2) What is the crack spread in the futures market now? How should the refiner close out the futures position? 3) What is the profit/loss of the hedged position? What is the profit/loss if the refiner did not hedge?

12 Hanse, Incorporated, has the following two mutually exclusive projects available. \table[[2,Year,Project R,Project S],[points,0,

,

The nonvolatile, nonelectrolyte DDT,

, is soluble in benzene

. Calculate the osmotic pressure generated when

grams of DDT are dissolved in

ml of a benzene solution at

K. The molarity of the solution is M. The osmotic pressure of the solution is atmospheres.

Gayle Hayashi, MD, opens a medical practice. During her first month of operation, January, the clinic, named Hayashi Medical Clinic, experienced the following events. (Click the icon to view the events.) Analyze the effects of these events on the accounting equation of Hayashi Medical Clinic. Analyze the events chronologically, one transaction at a time, beginning with the transaction on January 6th. For each transaction that follows the January 6 transaction, calculate the balance in each account after analyzing its effect on the accounting equation. (Complete only the necessary answer boxes for the transaction lines. Do not enter "0" in the transaction lines. For events with the same date, be sure to enter the set of transactions for each event on a separate line in the order presented in the problem. Carry down all balances to the "Bal." line, including zero balance accounts, entering a " 0 " for any zero balances. Enter a decrease in an account with a minus sign or parentheses. Abbreviations used: A/P = Accounts Payable; Capital = Gayle Hayashi, Capital; Exp. = Expense; Liab. = Liabilities; Med. = Medical; Rev. = Revenue; Sal. = Salaries; Sup. = Supplies.) \table[[ASSETS,

,\table[[LIAB.],[A/P]],\table[[+],[+]],EQUITY],[Cash,+,\table[[Med.],[Sup.]],+,Land,Capital,+,\table[[Service],[Rev.]],-,\table[[Sal.],[Exp.]],-,\table[[Rent],[Exp.]],\table[[,\table[[Utilities],[Exp.]],,,,,,,,,,,,,,,],[,+,,+,,

,,+,,+,,-,,-,,-,]],]] Events Jan. 6 Hayashi invested

in the clinic by opening a bank account in the name of Hayashi Medical Clinic. 9 Hayashi Medical Clinic paid cash for land costing

. There are plans to build a clinic on the land. Until then, the business will rent an office. 12 The clinic purchased medical supplies for

on account. 15 On January 15, Hayashi Medical Clinic officially opened for business. 15-31 During the rest of the month, the clinic earned professional fees of

and recelved cash immediately. 15-31 The clinic paid cash expenses: employee salaries,

; office rent,

; utilities,

. 28 The clinic sold supplies to another clinic at cost for

. 31 The clinic paid

on the account from January 12 . Print