Exams & Certification

Which of the following statements regarding PERT analysis is NOT true? A Project standard deviation is the sum of all critical activity standard deviations. B Each activity has three estimates of its duration. C Only critical activities contribute to the project variance. D The most likely time is different from the expected activity time. E […]

Which of the following statements regarding Gantt charts is true? a) Gantt charts give a timeline and precedence relationships for each activity of a project. b) Gantt charts use the four standard spines: Methods, Materials, Manpower, and Machinery. c) Gantt charts are visual devices that show the duration of activities in a project. d) Gantt

Physics Neglecting air resistance, an object in free fall accelerates at 32 feet per second squared. So the velocity of the object t seconds after being dropped is 32t feet per second. Suppose a ball is dropped from the top of the Sears Tower. a. Use integration to find how far the ball would fall

A ball is thrown upwards. Neglecting air resistance, what initial upward speed does the ball need to remain in the air for a total time of 10 seconds? about 60 m/sabout 50 m/sabout 100 m/sabout 110 m/sabout 80 m/s The correct answer and explanation is : To determine the initial speed required for a ball

Write the chemical formula for the following compounds. (i) Tin (IV) Oxide = ___________ (ii) Sulfur trioxide = ___________ (iii) Iron(II) Phosphate = ___________ (iv) Strontium Hydroxide = ____________Write the chemical formula for the following compounds. (i) Tin (IV) Oxide = ___________ (ii) Sulfur trioxide = ___________ (iii) Iron(II) Phosphate = ___________ (iv) Strontium Hydroxide

Round 298, 596 to ten-thousands? The correct answer and explanation is : To round the number 298,596 to the nearest ten thousand, we follow these steps: Since the thousands digit is 8 (which is greater than 5), we increase the ten-thousands digit (9) by 1, resulting in 10. This changes the hundred-thousands digit from 2

Draw the product of the E2 reaction shown below. Include the correct stereochemistry. Ignore any inorganic byproducts. CH3 LOCH3 H H3CH2C H Br Q NaNH2 Draw the E2 Product Draw the product of the E2 reaction shown below. Include the correct stereochemistry. Ignore any inorganic byproducts. H Ph. . H Ph CH3 Br DBU Draw

Lon is selling his home that has a severely damaged foundation. This damage is obvious. The home also has asbestos inside its walls, but this condition cannot be discovered without tearing the walls apart. The correct answer and explanation is: Correct Answer: Lon is required to disclose the foundation damage because it is an obvious

The post and the beam are made of A-36 steel, and the moment of inertia of the beam is I= 255(106)mm^4. If the temperature of the 75-mm-diameter post CD is increased by 65 °C, determine the force developed in the post. Express your answer to three significant figures and include the appropriate units. The correct

Cold cabin? During the winter months, the temperatures at the Colorado cabin owned by the Starnes family can stay well below freezing (32°F or 0°C) for weeks at a time. To prevent the pipes from freezing, Mrs. Starnes sets the thermostat at 50°F. The manufacturer claims that the thermostat allows variation in home temperature of