Chapter 12, Problem 14QAP

Can you show how the correct answer was found.

13.64 The shaft shown in Sketch h transfers power between the two pulleys. The tension on the slack side (right pul- ley) is 30% of that on the tight side. The shaft rotates at 900 rpm and is supported uniformly by a radial ball bearing at points 0 and B. Select a pair of radial ball bear- ings with 99% reliability and 40,000 hr of life. Assume Eq. (13.83) can be used to account for lubricant clean- liness. All length dimensions are in millimeters. Ans. Cmin = 42,400 N.

Part 3: Problem-Solving. Solve the following problems. Show all calculations. 1. A retaining wall 5.80m high supports soil that has the following properties: Unit weight = 17.3 kN/m³ Angle of internal friction = 26 deg. Cohesion = 14.5 kPa a) Calculate the normal pressure acting at the back of the wall assuming no tensile crack occurs in the soil. b) Find the location of the tensile crack measured from the surface of horizontal backfill. c) Determine the active pressure acting on the wall in tensile crack occurs in the soil. 2. The soil material is supported by a retaining wall to a height of 6m. The unit weight of the soil is 16 kN/m³ and the angle of internal friction is 29 deg. Assume the soil is cohesionless. a) Determine the earth pressure on the wall. b) Find the total active pressure if surcharge of 14 kPa is applied on the surface of horizontal backfill. c) Locate the position of the total pressure from the bottom.

For the circuit shown in Figure (1). Solve the following: ( A. What type of logic does it represent? C. Explain the function of D1. B. What type of logic family does it belong to? D. Explain the importance of DL. E. How many stages it has? Explain the function of each one. F. Construct the truth table and explain it briefly. G.How can you convert this circuit to an open collector form? Explain and sketch it. H.How can you convert this circuit to a tri-state form? Explain and sketch it. I. How can you prevent the transistors from being saturated? J. Which transistor should be modified to convert this circuit to a 4-inputs NAND? Explain and sketch it. K.Convert this circuit to a 2-inputs NOR gate and draw it. R-1200 R-4.2K R-1.5K R-IK Figure (1) lour e Your

E. How many stages it has? Explain the function of each one. F. Construct the truth table and explain it briefly. G.How can you convert this circuit to an open collector form? Explain and sketch it. H.How can you convert this circuit to a tri-state form? Explain and sketch it. I. How can you prevent the transistors from being saturated? J. Which transistor should be modified to convert this circuit to a 4-inputs NAND? Explain and sketch it. K.Convert this circuit to a 2-inputs NOR gate and draw it. R-4.2K W R-1200 R-1.5K R-IK Figure (1) JOUT e Your

A 4 inch wide, 12 inch tall cross section beam is subjected to an internal shear of 5.5 kips. What is the maximum transverse shear stress in the beam in psi if this bending is about the x axis?

A3Q3.c - You are to write a C program that implements the following disk scheduling algorithms: a. FCFS [10 marks] b. SCAN [10 marks] c. C-SCAN [10 marks] d. SSTF [10 marks] e. LOOK [10 marks] f. C-LOOK [10 marks] • Your program will service a disk with 300 cylinders numbered 0 to 299. • • • • The program will service the requests (a list of 20 cylinder numbers) given in the file request.bin. This file contains (4 byte) integer values representing requests ranging from 0-299. Your program will take the initial position of the disk head as the first command line argument and the direction of the head as the second command line argument. It will then output the requests in the order in which they are serviced, and the total amount of head movements required by each algorithm. In particular, your program needs to do the following: Your program should take two command line arguments a) First command line argument - initial position of the disk head (an integer value) b) Second command line…

Question 3 (20 points): The traffic volume on a 2-lane highway is 1600 veh/hr in each direction Page 3 of 6 with a density of 20 veh/mi. A large dump truck enters the traffic stream from an adjacent construction site at 20 mph and carries on this way for 2 miles before turning off to the dump site. Because flow is so high in the opposite direction, no one can pass the truck. As a result, traffic back up behind the truck at four times the density (i.e., 4x20 = 80 veh/mi) at a volume of 1000 veh/hr. How many vehicles get caught in the traffic congestion before the truck exits the highway?

1. Determine the z-transform, including the region of convergence (ROC), of the following signals: a）x［n=｛3,0,0,0,0,51-4｝ b) x2[n] = ((1/3)^n ,n ≥0 2", n < 0 c) X3[n]= (1/3)^n- 2", n ≥ 0 0, n < 0