Engineering

Determine the moment of the force about point O. Assume F = 750 lb. (Figure 1) Express your answer to three significant figures and include the appropriate units.
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to submit tenders for a structure to help people safely cross the river at KwaDukuza The Thukela Municipality placed a tender request in the newspaper asking contractors village. Municipalities are not allowed to choose a contractor without giving as many contractors as possible a chance to apply. This is to stop anyone from being favoured over others, and to prevent corruption. Each contractor writes a tender document, which is a description of their plan for the project and shows how much they will charge to complete the work. The job is given to the contractor who presents the best plan at the lowest price. You are going to build a structure to help the community. Read the story again and then investigate the different bridges below to decide which structure will be the best solution for the problem.
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The nozzle has a diameter of 40 mm. Assume water is ideal fluid, that is, incompressible and frictionless (Figure 1) Part A If it discharges water with a velocity of 20 m/s against the fixed blade, determine the horizontal force exerted by the water on the blade. The blade divides the water evenly at an angle of -45 Express your answer to three significant figures and include the appropriate units. Figure 1 of 1 F-Value Units 40 mm Submit Request Answer Provide Feedback Next
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in a distributor ignition system, what rotates under the distributor cap to send the high voltage to each spark plug wire?
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why should ventilation be done at the development stage of a mine
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true/false. markov chain and determinant show that if 0 is an eigen value then cofactor matrix equal product of eigen value
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Which method could be used to convert a numeric value to a string? a str b value cnum d chr True/False: Both of the following for clauses would generate the same number of loop iterations: for num in range (4): for num in range (1,5): What is the result of the following statement? x = random.randint (5, 15) * 2 a A random integer from 5 to 15, multiplied by 2, assigned to the variable x b A random integer from 5 to 15 assigned to the variable x C A random integer from 5 to 15, selected in 2 steps, assigned to the variable x d A random integer from 5 to 15, raised to the power of 2, assigned to the variable A(n) _gives information regarding the line number(s) that caused an exception. a) Reverse b) Traceback block c) Exception d) Try block Which block gets executed even if the error occours or it doesn't a. Finally b. Try c. Except d. Else What would you use if an element is to be removed from a specific index? a del statement b remove method Cindex method d slice method True/False: Strings can be written directly to a file with the write method, but numbers must be converted to strings before they can be written. Which mode specifier will open a file but will not let you change the file or write to it? a w br
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True or false: One factor that influences successful catching, which relates specifically to the visual observation of the object, is the amount of time of object contact with the hand and fingers.
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in the 1850's, the hottest new technology was the telegraph. messages or telegrams could be sent via electrical forces traveling through a wire. write a program that will generate a bill for sending a telegram and give the user the opportunity to translate a message into morse code. the amount owed for sending a telegram is based on the number of words sent. customers are charged at a rate of $1.50 for blocks of 5 words and $0.50 for single words. named constants must be used in the calculation. for now, your program will only translate a single letter into morse code. in the next project, you will add the functionality to translate an entire message. use the tables below to translate letters into morse code.
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A truck comes to a stop from an initial forward speed of 95 km/hr in a distance of 65 m with uniform deceleration. Determine whether or not the crate strikes the wall at the forward end of the flat bed. If the crate does not strike the wall, enter a value of 0, otherwise, calculate its speed relative to the truck as the impact occurs. The coefficients of friction between the flat bed of the truck and the crate are ms = 0.21 and mk = 0.16. The distance between the crate and the foward end of the flat bed is 3m.
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The amount of energy derived from an electric source, commonly measured in volts is called
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Which of the following best describes a potential unintended negative consequence of implementing measures to control acid deposition?A.) A reduction in environmental lead, leading to decreased negative health effects in humans and wildlifeB.) A reduction in sulfur for crops as a result of less acidic rainfall, leading to an increased need for sulfur supplementsC.) A reduction in mortality rates in freshwater aquatic organisms from an increase in pH of the waterD.) A reduction in acid mine drainage, resulting from a reduced need for nuclear fuel and uranium mining
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Construct a triangle , having its perimeter = 55 mm and the ratio of its angles 2:1:3 . I want the steps along with the drawing . this is ENGINEERING GRAPHICS grade 11 question .
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which of the following determinants are included in the 3m crs in order to establish the e/m code assignment structure?
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which of the following best defines the circuit conductors between the final overcurrent protective device and the outlet(s)?a. branch circuit b. feeder c. separately derived system d. service
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Which of the following will initialize a boolean array of three elements all containing true?I.boolean[] arr = {true, true, true};II.boolean[] arr = new boolean[3];III.boolean[] arr = new boolean[3];for (int i = 0; i < arr.length; i ++){ arr[i] = true;}
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A resistor (R) and a capacitor (C) are connected in series to a battery of terminal voltage V0. Which of the following equations relating the current (I) in the circuit and the charge (Q) on the capacitor describes this circuit?A. V2012Q2CI2R=0B. V0+QCI2R=0C. V0QCIR=0D. V0CdQdtI2R=0E. QCIR=0
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fill in the blank. _________ can be defined as the transfer of genes for desirable traits, such as pest resistance, into crop plants from other organisms.
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if a researcher thought cohort effects would be a problem in their study, the researcher should avoid using a design. cross-sectional longitudinal experimental correlation
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Write the output equation for an inverting amplifier: a. Calculate the output of the circuit in Figure 5.1 given that Vin is 2v peak-to-peak. Vout-pp RF 2.2 k2 V+, pin R1 2.2 k OA1 LM741 Vout, pin V-, pin 1 kHz Figure 5.1. Inverting op amp Configuration 1 [1 b. Calculate the output of the circuit in Figure 5.2 given that Vin is 2v peak-to-peak. Vout-pp RF 2.2 k R2 V+, pin OA1 LM741 Vout, pin in Vin sine 1 kHz , pin
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Which of the following file transfer protocols use SSH to provide confidentiality during the transfer? (Select two.)HTTPSSFTPSCPFTPFTPS
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In the catch block of a try/catch statement for handling PDO exceptions, you can get a message that describes the exception by using the getMessage method of the Answer a. PDOStatement object b. PDO object c. Result set array d. PDOException object
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Can somebody help me with these. with solution 1 Two balls are drawn in succession without replacement from a box containing 4 red balls and 3 black balls. Let Y be the random variable, where Y is the number of the red balls. What is the expected value of this random event?2. Two balls are drawn in succession from a box without repetition containing 3 red 3 blue and four yellow marbles. What is the probability that they are of the same color?
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in which of the following scenarios is a remote pic not required to perform a preflight inspection of their suas? If the subsequent flight occurs immediately following a flight before which an inspection was made. Preflight inspections are only required for the first flight of the day, so any other flight does not require such an inspection. Preflight inspections are required before each flight, thus there is no scenario that precludes such an inspection.
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