Master Engineering with Fun Quizzes & Brain Teasers!

Estimate the chronic daily intake of toluene from exposure to a city water supply that contains a toluene concentration equal to the drinking water standard of 1 mg L1. Assume the exposed individual is an adult female who consumes water at the adult rate for 70 years, that she abhors swimming, and that she takes a long (20 minute) bath every day. Assume that the average air concentration of toluene during the bath is 1 g m3. Assume the dermal uptake from water (PC) is 9.0 106 m h1 and that direct dermal absorption during bathing is no more than 80% of the available toluene because she is not completely submerged. Use the EPA lifetime exposure of 75 years.
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Which phrase describes a technique of environmental biotechnology?A. creating plant varieties that can resist pestsB. using bacteria to treat chemical wastesC. using enzymes to process and finish fibersD. creating a breed of animal that is easy to tame
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La distancia que existe entre las bases de un campo de bisbol es de 28 m. Si la pelota se batea por la lnea en direccin a la tercera base con una velocidad de 32 m/s. Con qu rapidez cambia la distancia entre la pelota y la primera base cuando se encuentra a la mitad del camino hacia la tercera base?
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State whether the following statements are true or false. Provide a brief justification for your answer. a. Consider a SDOF system with Coulomb damping. When displaced from the equilibrium position and released, the mass may not move at all. b. Consider a SDOF system with an ideal viscous damper. When displaced from the equilibrium position and released, the mass will always undergo oscillatory motion. c. The damped natural frequency of a system is always greater than the undamped natural frequency d. For an undamped system undergoing a harmonic forcing, the amplitude of the response approaches zero as the forcing frequency becomes very high. e. The amplitude of free response of SDOF system with Coulomb damping decreases
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The site earthwork in Phase III of Four Hills Landfill project included a 3.0 ft deep cut across an entire 2.5-acre site. Soil was excavated from within the proposed Phase III footprint. The average unit weight of this soil is 118 lb/ft3, and the average moisture content is 9.6%. It also has a maximum dry unit weight of 122 lb/ft3 and an optimum moisture content of 11.1%, based on the modified Proctor test. The excavated soil will be placed on a nearby site and compacted to an average relative compaction of 93%. Compute the volume of fill that will be produced and express your answer in cubic yards.
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Chad is working on a design that uses the pressure of steam to control a valve in order to increase water pressure in showers. Which statement describes what his design is dealing with? viscosity, the resistance to flow that fluids exhibit elasticity, the indicator of how easily a fluid will return to its original volume after a force is removed from the fluid compressibility, the property that describes the amount of volume that decreases when pressure is applied to a fluid hydraulics, the use and study of liquid fluids and their motions, behaviors, and interactions
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A wall charger for a mobile device has a sticker label showing that it operates at 5V with 1A output. Which shows the correct formula to calculate power (P) in watts from the given values?
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The antipode of any location on Earth is the point on the opposite side of the planet. So the antipode of New York City is in the Indian Ocean off Perth, Western Australia. What are the terrestrial coordinates of this Indian Ocean location? (1) 41 north, 74 west (2) 41 north, 74 east (3)41 south, 74 west (4) 41 south, 74 east
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Question #9Multiple ChoiceWhich statement characterizes how the creation of LIMBS benefits developing countries?O Using nanotechnology, a new material is created to benefit many other productsUsing only natural materials, there is little chemical production, thus reducing the pollution in these countriesUsing regional materials creates a sustainable program that breaks countries dependencies on other nationsUsing fabricated materials, no natural resources are overfarmed, keeping the environment intact. 2014 Glynlyon, Inc.
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what does nasa stand for
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Which description is that of a vertical stroke?
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How can we confirm that a sketch is fully constrained? *( In AutoDesk Inventor)
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what is the most embarrassing thing that has happened to you its OK no judging
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The refinement of a fuel additive to improve gas mileage represents which step in the engineering design process?A.)modify a prototypeB.)conduct applied researchC.)state a problemD.)conduct basic research
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What branch of chemistry is credited with the development of silicone?A.)biochemistryB.)organic chemistryC.)inorganic chemistryD.)analytical chemistry
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The question How do plants convert sunlight to energy? best represents which of the following?A.)applied scienceB.)astronomyC.)nuclear physicsD.)basic science
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Create an array of 10 size and assign 10 random numbers. Now find the sum of the array using for and while loop.
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Using a telescope to determine the different particles in the rings of Saturn represents which step in the scientific process?A.)conduct an experimentB.)conduct basic researchC.)ask a questionD.)conduct applied research
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By conducting a survey, Sarah and Jesse determine that an open space is home to over fifty different species of plant life.True or false
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I'm not sure if its true
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4. Which of these is typically NOT a function of the flywheel?OA. Power transfer to the transmissionOB. Engage the StarterOC. Smooth out power pulsesOD. Balance the crankshaft
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Structural engineers, designing an eighty-story office building, need to account for sway. They would most likely use a(n) ____There aren't any answer choices
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Physical strength and dexterity for operating tools are most important forO carpenters.O surveyors.O architects.O civil drafters.
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Pls help I will mark brainlesst
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