Wave velocity Use Exercise 69 to do the following calculations.
- a. Find the velocity of a wave where λ = 50 m and d = 20 m.
- b. Determine the depth of the water if a wave with λ = 15 m is traveling at v = 4.5 m/s.
69. Wavelength The velocity of a surface wave on the ocean is given by
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- When you borrow money to buy a house, a car, or for some other purpose, you repay the loan by making periodic payments over a certain period of time. Of course, the lending company will charge interest on the loan. Every periodic payment consists of the interest on the loan and the payment toward the principal amount. To be specific, suppose that you borrow $1,000 at an interest rate of 7.2% per year and the payments are monthly. Suppose that your monthly payment is $25. Now, the interest is 7.2% per year and the payments are monthly, so the interest rate per month is 7.2/12 = 0.6%. The first months interest on $1,000 is 1000 0.006 = 6. Because the payment is $25 and the interest for the first month is $6, the payment toward the principal amount is 25 6 = 19. This means after making the first payment, the loan amount is 1,000 19 = 981. For the second payment, the interest is calculated on $981. So the interest for the second month is 981 0.006 = 5.886, that is, approximately $5.89. This implies that the payment toward the principal is 25 5.89 = 19.11 and the remaining balance after the second payment is 981 19.11 = 961.89. This process is repeated until the loan is paid. Write a program that accepts as input the loan amount, the interest rate per year, and the monthly payment. (Enter the interest rate as a percentage. For example, if the interest rate is 7.2% per year, then enter 7.2.) The program then outputs the number of months it would take to repay the loan. (Note that if the monthly payment is less than the first months interest, then after each payment, the loan amount will increase. In this case, the program must warn the borrower that the monthly payment is too low, and with this monthly payment, the loan amount could not be repaid.)arrow_forwardInterest on a credit card’s unpaid balance is calculated using the average daily balance. Suppose that netBalanceis the balance shown in the bill, paymentis the payment made, d1is the number of days in the billing cycle, and d2is the number of days payment is made before the billing cycle. Then the average daily balance is: averageDailyBalance = (netBalance * d1 –payment * d2) / d1 if the interest rate per month is say, 0.0152, then the interest on the unpaid balanceis: interest = averageDailyBalance * 0.0152 Design a program that accepts as input netBalance, payment, d1, d2, and interest rate per month. The program outputs the interest charged. Format your output to two decimal places. C++arrow_forwardComplete the following codearrow_forward
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- Both while loops and do-while loops are executed as long as a stated boolean condition is true and both while loops and do while loops terminate if the boolean condition is false. What is the only (major, key) difference between the two types of loops. 1. while loops are faster 2. A do-while loop can be rewritten as a for loop, but we cannot rewrite a while loop as a for loop. 3. A do while loop will always execute the loop statements once, but it is possible that a while loop skip all of its loop statements.arrow_forwardAlert -Don't submit AI generated answer and i need unique response only if I see plagiarism then I'll reduce rating for sure.arrow_forwardAn instructor wants to give feedback to students in an assignment according to the number of correctly solved programs. Example of feedback : Nb of correct programs Feedback incomplete assignment partially correct assignment Satisfactory attempt Good attempt Excellent attempt The following figure shows an example of execution. Feedback to Students Enter the number of correctly solved programs The feedback is Excellent, Press any key to continue... tv T W 10 1. 3.arrow_forward
- C++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage LearningC++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology Ptr