Engineering

Consider the design of turbojet engine intended to produce a thrust of 25,000 lb at a takeoff velocity of 220 ft/s at sea level. At takeoff, the gas velocity at the exit of the engine (relative to the engine) is 1,700 ft/s. The fuel-air ratio by mass is 0.03. The exit pressure is equal to the ambient pressure. Calculate the area of the inlet to the engine necessary to obtain this thrust.
1 Answer
The traditional methodology used to develop, maintain, and replace information systems is called thea.Enterprise Resource Model.b.Agile Deployment Life Cycle.c.Systems Development Life Cycle.d.Unified Model.
1 Answer
3.8 sketch a thrust required curve and a power required curve and show where l=dmax occurs on each curve.
1 Answer
water is use to cool air to 30c from 150c in a exchanger. volumetric flow rate of cooling water is measured as 5m3/s. water gets into the heat exchanger at 10c and exits wits 50c temperature. you can neglect pressure losses through the heat exchanger. determine the entropy generation rate in the heat exchanger.
1 Answer
Casey uses X g of solid and YmL of vinegar in the first trial of this experiment, and the bag ends up being about 25% full. Assuming only one of the two reactants was limiting in this trial and one was in excess, how could Casey figure out which one is limiting and which one is in excess by doing exactly one more trial (i.e., without doing any calculations)? Explain in detail what Casey should do the two possible outcomes of the trial, and how Casey would I will conclude interpret those possible outcomes. For example, state "If I see because But if I see . I will conclude because in one of the
1 Answer
Q7.Please write a query statement from emp table to display ename, sal, and sal_star for all employees. Each astetrisk is signified by a one-hundred dollars. For example, Mary's sal is 1500, the sal_star data is 3 asterisks. Sort the data in an descending order of sal_star. Label the column headingto ENAME and SAL_STAR. The result should be like below:[Format your Query]SQL> SET LINESIZE 200SQL> SET PAGESIZE 100SQL> COLUMN sal_star FORMAT a60[Execute your Query] SQL> SELECT ename, sal, ...FROM empORDER BY ...;ENAME SAL SAL_STAR---------- ---------- ------------------------------------------------------------SMITH 800 ********JAMES 950 *********ADAMS 1100 ***********WARD 1250 ************MARTIN 1250 ************MILLER 1300 *************TURNER 1500 ***************ALLEN 1600 ****************CLARK 2450 ************************BLAKE 2850 ****************************JONES 2975 *****************************FORD 3000 ******************************SCOTT 3000 ******************************KING 5000 **************************************************
1 Answer
4.20 LAB: Warm up: Automobile service cost(1) Prompt the user for an automobile service. Output the user's input. (1 pt)Ex:Enter desired auto service:Oil changeYou entered: Oil change(2) Output the price of the requested service. (4 pts)Ex:Enter desired auto service:Oil changeYou entered: Oil changeCost of oil change: $35The program should support the following services (all integers):Oil change -- $35Tire rotation -- $19Car wash -- $7If the user enters a service that is not listed above, then output the following error message:Error: Requested service is not recognized
1 Answer
When parsing out the command line arguments passed into the main(), what is always in the first argument?The name of the executableThe first argument after the executable nameA list of all the arguments that follow the name of the executable's nameThe number of arguments
1 Answer
in general, the mechanical stresses on bones that result from exercise tend to weaken them and lead to more frequent fractures. (True or False)
1 Answer
Write a function that takes a string as an argument and returns a dictionary whose keys are letters and values are counts of those letters in the string. Ignore case.
1 Answer
25. SHARED BIRTHDAYS Find the probability that of 25 randomly selected people, at least 2 share the same birthday.
1 Answer
true or falseThe operator of a digger derrick may not leave their position at the controls while a load is suspended.
1 Answer
What is the complexity of maximum subarray sum?
1 Answer
when encapsulation in not available under class I conditions, the contractor or installer
1 Answer
What is the difference between cd and lcd in ftp?Question 2 options:lcd moves to the home directoryThere is no differencelcd changes directories on the client computer.lcd changes directories on the host computer.no answer found
1 Answer
why is a stack not good for round robin (rr) schedulers ? but a queue is. explain reasons for both.
1 Answer
what is the mass of the three helium nuclei? that is: what is 3mhe = ?
1 Answer
are a consequence of ill-defined organizational rules.a. Behavioral and attitudinal vulnerabilitiesb. Misinterpretationc. Coding problemsd. Physical
1 Answer
the elements of an array can be of different types. choose one 1 point true false
1 Answer
move the last tag from the first tag to be the first tag in the second
1 Answer
651. determine the force in each member of the space truss and state if the members are in tension or compression. the truss is supported by short links at a, b, and c.
1 Answer
The following SQL is correct (It will run without any error) SELECT Dno, Count(*) FROM Employee GROUP BY Dno Where salary > 40000; a. True b. False
1 Answer
when fluorescent fixtures are installed in recreation rooms, fixture whips constructed of ......... of flexible metal conduit are useda.18 to 24 inchesb.2 to 3 feetc.4 to 6 feetd.6 to 8 feet
1 Answer
jupiter explorers has $10,400 in sales. the profit margin is 4 percent. there are 4,600 shares of stock outstanding, with a price of $1.80 per share. what is the company's priceearnings ratio?
1 Answer