# Homework Help: Science: Engineering

## Recent Homework Questions About Engineering

**engineering**

Hey everyone! I have an exam on Monday and I want to know what I should do for this. Explain the sources and implications of size effect in strength of materials. Thank you sooo much ! :)

**accounting**

On October 10, 2010, Mason Engineering Company completed negotiations on a contract for the purchase of new equipment. Under the terms of the agreement, the equipment may be purchased now or Mason may wait until January 10, 2011, to make the purchase. The cost of the equipment...

**engineering**

haw calculat the deflated trisection

**engineering**

What do you do to peel a hard boiled egg so the shell will not not not stick to the white. so you can eat the egg and not get egg shell in your mouth?

**College engineering**

A prismatic bar has length L = 2m and a circular cross-section with diameter d = 50 mm. A tensile load is applied which causes thhe bar to extend by ∂ = 1.4 mm. a) Find the normal strain. b)If the elastic modulus is 200 GPa, find the applied aal tensile load P. I got ...

**Engineering**

A plane element is subjected to a shear stress τ = 360MPa which results to a shear strain σ = 0.008rad. a) determine the shear modulus G of the element b)What is the horizontal displacement, d, of the element if te height of the element is equal to 50mm I worked out ...

**Engineering science**

a roller of diameter 1.5 m has a mass of 450 kg; it is pulled by a handle attached to its centre. Find the minimum force to pull up a step which is 250 mm high if the roller handle makes an angle of 30o with the horizontal

**Mechanical Behavior of Materials**

Calculate the load that a fibroblast cell applies to buckle a single column in a collagen tissue engineering scaffold, given that the column has a length of 100μm, is circular in cross section, with a diameter of 2μm, and has a Young's modulus of 5MPa. You can assume...

**college statistics**

the math SAT scores for all students who applied to the school of engineering are normally distributed with M=629 and standard deviation of 60. the school of engineering has decided to accept those students whose scores fall in the top 15%. what is th minimum score an appliant...

**engineering ecnonmics**

A 20-year-old student decided to set aside $100 on his 21st birthday for investment. Each subsequent year through his 55th birthday, he plans to increase the investment on a $100 arithmeticgradient. Hewill not set aside additional money after his 55th birth- day. If the ...

**Engineering**

Have a new tutor who has failed to teach us most of his assignment, I've finally got stuck on derivation of the formula G=E/2(1+v). any help would be much appreciated!

**engineering**

should my calculated bulk modulus of a liquid be (-)? the lookup tables i'm comparing the results too have positive values, or is it written without the (-) as a negative bulk modulus is impossible?

**Science**

Think about the factors that will influence the evolution of humans in the future. Name one factor that would exert influence through the process of natural selection and one factor that would exert influence through artificial selection. 1.natural selection: genetic ...

**Computer Engineering (microcomputers)**

Count the number of bytes: Modify any one of the last three programs, to also count the total number of bytes actually copied, the count should appear in a register. I suggest you set a breakpoint at the INT 20 instruction, because the registers can be reset if the INT 20 ...

**Fundamental engineering principles**

A car traveling at 108 km hr-1 deceleration uniformly from 108 km hr-1 to 72 km hr-1whilst covering 200m.it continues at this reduced for 150m before slowing down uniformly to rest over a distance of 225m. Draw the velocity-time diagram and use it to determine: (A)the total ...

**Persuasive Essay (Please, help me!)**

Please, help me! I'm struggling to write my persuasive essay that must be completed by tonight. I don't know know whether that which I have written makes sense. I don't know what else to write, either! My essay is about why high school students should be exempt from taking the...

**engineering science N4**

A steel block is resting on a Flat plank 6m long ,and how high can one end of a plank be lifted For the block to start to move,if the coeficient of friction is 0.3

**science!!**

1) Which of the following correctly states the relationship between hippos and whales? (1 point) A) Whales evolved from hippos. B) Hippos evolved from whales.*** C) Hippos and whales do not share a common ancestor. D) Hippos and whales evolved from a common ancestor. 2) fossil...

**Engineering**

what heading must a pilot fly to compensate for a 125km/h west wind to have a ground track that is due south? The airecraft cruise speed is 600 km/h. What is the actual ground speed?

**Engineering Calc.**

Water is leaking out of an inverted conical tank at a rate of 6700.0 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 7.0 meters and the diameter at the top is 4.0 meters. If the water level is rising ...

**Basic Chemical Engineering**

Can someone plz give me the link of the process flow diagram of a textile(dyehouse)? I only need to know the procedures of the main components in the dyeing section. Plz help!

**engineering ecnonmics**

By installing some elaborate inspection equipment on its assembly line, the Robot Corp. can avoid hir- ing an extra worker who would have earned $36,000 a year in wages and an additional $9500 a year in employee beneﬁts. The inspection equipment has a 6-year useful ...

**economic engineering**

By installing some elaborate inspection equipment on its assembly line, the Robot Corp. can avoid hir- ing an extra worker who would have earned $36,000 a year in wages and an additional $9500 a year in employee beneﬁts. The inspection equipment has a 6-year useful life...

**engineering science**

Two objects, with masses 10kg and 6kg respectively, move in the same direction in the same straight line at velocities 8m/s and 4m/s repectively, when they collide. The objects remain in contact with each other after collision. Calculate the common velocity and the direction ...

**Engineering science**

A water pump produces 9KL of water per hour at a height of 70 m above the pump.The pump is driven by a 3 KW electric motor.calculate. 1) The work done per hour 2) The work done per minute

**Engineering Dynamics**

A ball is thrown so that the motion is defined by the equations x=5t and y=2+6t-4.9t^2, where x and y are expressed in meters and t is expressed in seconds. a) find velocity at t=1s, b) find the horizontal distance the ball travels before hitting the ground.

**engineering measurment**

A rotating search coil has 10 turns with a cross-sectional area of 5cm2. It rotates at constant speed of 100rpm. The output voltage is 80mV. Calculate magnetic field strength

**Vector**

Your engineering firm plans to design an elevator for a hospital. The force exerted on a passenger by the floor of the elevator is not to exceed 1.60 times the passenger¡¦s weight. The elevator accelerates upward with constant acceleration for a distance of 3.0 m and then ...

**engineering mechanics**

the greatest and least resultant of two forces are respectively 17 KN and 5 KN. determine the angle between two force when their resultant is root 144 KN.

**engineering science**

An object is kept in equilibrium on an incline by means of supporting force, which is at an angle of 30 degrees o the inclined. The weight of the obbject is 500N. The incline forms an angle of 45 degrees with the horizontal. The coefficent of the friction between the surfaces ...

**engineering**

what do you mean by impact and Shock loading

**engineering science**

An object weighing 60N rest on a slope forming an angle of 17.5 degrees with the horizontal. A force of 44N parallel to the sloping surface just moves the object upwards. Calculate the frictional force.

**economics 11**

The demand and supply schedules for milk are as follows: Price Quantity Demanded Quantity Supplied 10 0 125 8 20 95 6 40 65 4 60 35 2 80 5 a. On the same graph, draw the demand and supply curves. What does the demand curve for a product describe? What does the supply curve for...

**Engineering**

A box with an open top is to be made from a square piece of cardboard by cutting equal squares from the corners and turning up the sides. If the piece of cardboard measures 12 in on the side, find the size of the squares that must be cut out to yield the maximum volume of the ...

**Ponce High School**

An executive in an engineering firm earns a monthly salary plus a Christmas bonus of 5300 dollars. If she earns a total of 98700 dollars per year, what is her monthly salary in dollars?

**Engineering**

Determine the relationship between the radius and height of a right-cone with a volume of 300 cm3. This is all there is to the question and I'm not sure what my teacher wants for an answer.

**engineering maths**

Show that the following curves are intersect eachother orthoganally.r-(1+coso) r-(1-coso)

**Engineering**

Phase diagram for soil Mechanics?

**Engineering maths**

A rectengular swimming pool 30m long and 22m wide is made.And a deck of the uniform width is made around the pool,and only 480m^2 deck is made,HOW WIDE SHOULD THE DECK BE?

**physics, mit 2.01x, mechanical engineering**

MITx 2.091x Can anyone help me on this question: HW9_3: Design against buckling in a SD truss We are considering again the truss in the figure, from homework problem HW4_2. The truss is loaded at joint C as indicated, and we had determined the axial forces in each of the bars ...

**Accounting**

On October 10, 2010, Mason Engineering Company completed negotiations on a contract for the purchase of new equipment. Under the terms of the agreement, the equipment may be purchased now or Mason may wait until January 10, 2011, to make the purchase. The cost of the equipment...

**statistics**

The human resources department of an engineering company gives IQ tests to a randomly selected group of new hires every year. They claimed that the mean IQ score of new hires, , from this year is greater than or equal to the mean IQ score of new hires, , from last year. This ...

**environmental engineering**

Coal has about 2% sulfur. How many kilograms of sulfur would be emitted from coalfired power plants in the United States in 1 yr? (U.S. electricity production is about 0.28 × 1012 watts, and coal has an energy content of about 30 × 106 J/kg. Note that 1 J = 1W-sec.)

**environmental engineering**

A water treatment plant has 6 settling tanks that operate in parallel (the flow gets split into six equal flow streams), and each tank has a volume of 600m3. If the flow to the plant is 10 mgd, what is the retention time in each of the settling tanks? If, instead, the tanks ...

**environmental engineering**

A power plant emits 120 lb of flyash per hour up the stack. The flow rate of the hot gases in the stack is 25 ft3/sec. What is the concentration of the flyash in micrograms per cubic meter?

**environmental engineering**

A water treatment plant produces water that has an arsenic concentration of 0.05 mg/L. a) if the average consumption of water is 8L of water each day,how much arsenic is each person drinking? b)If you are the water treatment plant operator and the chairman of the town council ...

**mechanical engineering**

A load W=2 kN is applied vertically to joint C of truss ABCDE as indicated. You will use the method of joints to obtain the axial forces in the bars and reactions at the supports A, E . E4_1? All the bars in truss ABC have constant cross section and are made of a homogeneous ...

**engineering economics analysis**

where can i attach a file ?

**engineering science**

The mass of a truck is 5000kg and it is stationary on an incline plane making an angle of 16 with the horizontal. The coefficient of friction

**Engineering science**

a 50kg mass is suspended from a spring, causing it to extend by 30mm. calceolate the spring stiffness? The mass is then pulled down a distance of 90mm and released. calculate the frequency of the resulting motion, assuming that this is simple harmonic, calculate the velocity ...

**Chemistry**

Chemistry and engineering topics how chemistry relates to engineering for my 10 page research paper

**engineering mechanics**

A police officer observes a motorist who is approaching at a uniform speed of 80km/h he in his patrol car starts chasing it as it just crosses him.after accelerating for 8 seconds at a constant rate he attains his top speed of 120km/h how long does it take to overtake the ...

**Science**

Can anyone help me with some topics to write about on what chemistry has to do with mechanical engineering. Anyone's help would be appreciated because I really need to finish this 10 page research paper.

**Chemistry**

Can anyone help me with some topics to write about on what chemistry has to do with mechanical engineering. Anyone's help would be appreciated because I really need to finish this 10 page research paper.

**English**

Identify the word that has an error in capitalization. Destini plans to study engineering at Stanford university. A.) engineering B.) Stanford C.) university**************************** D.) no error Did you know that the largest lake in North America is Lake Superior? A.) ...

**Engineering skill**

anybody here to give me notes to solve this question (A and B are two points on a pipe of diameter 600 mm. the grid reference for the two points are given in the below , together with the elevation of the top of the pipe at these points. A drain pipe is being planned, and P ...

**engineering**

Hello guys.I got a homework and seem like I am stocked. a)What type of experiments should be done to find the relationship between the strength of concrete and water/cement ratio. b)what will be the range of the water/cement ratio? It would be great if you help.Thank you!

**science**

How are restriction enzymes important tools in genetic engineering?

**Engineering**

Three resistors , 50 ohms, 100 ohms, and r3 are connected in a series to a power source with potential difference 48 volts and a current throughout the circuit. Can anyone help me figure out what r3 is ?

**Engineering Physics**

which of the following is equal to the angular acceleration of a disk? a)first time derivative of angular position b) second time derivative of angular position

**electrical engineering**

A three phase, four- pole, 30-hp, 220-V, 60-Hz, Y-connected induction motor draws a current of 77 A from the line source at a power factor of 0.88. At this operating condition, the motor losses are known to be the following: Stator copper losses = 1033 W Stator core losses = ...

**electrical engineering**

A 3-ph., 4-pole, 60Hz induction motor is supplied by a 660-V source. At a particular loading, the total power consumed is 65KW and the current drawn from supply is 70A (assume star connection). The rotor speed is 1760rpm. The stator iron losses are 1.2KW, the windage and ...

**cost accounting**

Marvin’s Motors Company (MMC) manufactures outboard motors for use on small to medium sized boats. MMC produces three models: the Standard, the Deluxe and the Performance. The company uses a normal job costing system with manufacturing overhead applied on the basis of direct...

**engineering mathematics 1**

your father wants to fence a rectangular area in your backyard for a garden. one side of the garden is along rhe edgeof the yard is already fenced, so you only need to build a new fence along the other 3 sides of rectangle. if you have 80 meter of fencing available, what ...

**engineering**

A certain amount of radioisotope (986.8 x 10-9 kg) is used to make the dial of a watch glow in the dark. If the half-life of this isotope is 3.69 x 103 years, how many kilograms of the radioisotope will disappear while the watch is in use for fifty years?

**Engineering Science**

If a helical tension spring consisting of 12 live coils of ¼ inch steel wire and of 1 ¼ inch mean diameter is attached to the end of another helical tension spring of 18 live coils of ¼ inch steel wire and of 1 ¾ inch mean diameter, calculate the largest load (kN) that may...

**please check(Social studies)**

please check my answers thanks 1.B 2.C 3.B 4.B 5.C and D 1.How did the haitian revolution impact the history of the united states? A.It brought the united states into a war with spain over cuba. B.France no longer had haiti,so Napeleon was willing to sell louisiana. C.Slave ...

**life orientation**

study fieldy/career of chemical engeneering,mechanical engineering,and provide two reasons for each choice

**Finance**

Wanstead Engineering Case 9 The annual bonus for senior managers at Wanstead Engineering was first agreed in 1998. Since then the company has seen no need to make any changes to the way in which the bonus is calculated. Both shareholders and managers agree the bonus is ...

**Engineering science**

A brick with a mass of 6kg is dropped vertically from a certain height.it takes 4,5 seconds for the brick to reach the ground.determine the ff.the height from which the brick is dropped and potential energy of the brick

**LECTRICAL ENGINEERING**

WHAT IS THE FORMULAR FOR CALCULATING THERMAL ENERGY WHEN GIVEN CURRENT,VOLTAGE,TIME,TEMPERATURE

**engineering**

Building and construction A. Architecture B. Engineering C. Nursing D. Statistics

**social studies**

In 1846, the population of San Francisco, California, was only 200. By 1852, the city's population was 36,000. Which contributed the most to San Francisco's population change? (5 points) The Gold Rush The Mexican-American War The Monroe Doctrine The Trail of Tears 2. Public ...

**social studies**

In 1846, the population of San Francisco, California, was only 200. By 1852, the city's population was 36,000. Which contributed the most to San Francisco's population change? (5 points) The Gold Rush The Mexican-American War The Monroe Doctrine The Trail of Tears 2. ...

**physical since,pure maths,life science**

wt cn i become? except all de engineering thngs?plz help

**tech**

Why is drawing important to Technology and Engineering?

**engineering**

. A platform with boat weighs 10,000 N. Four cables are attached to the platform as shown; the edges of the platform are always a horizontal distance of 2 m from the pulleys. As the platform rises smoothly and evenly, the length L of the cables decreases and the angle θ ...

**careers**

Universities in India from where jobs from abroad will be offered to students after completing B.Tech in aeronautical engineering.

**Science**

Associate each item in the table with at least one field of science and one area of technology/engineering. Choose from the terms given at the bottom. Automobile aspirin shirt computer pesticide satellite robot atomic bomb vaccination can of soup polyester wrapper skyscraper ...

**Engineering**

Microprocessing chips are randomly sampled one by one from a large population, and tested to determine if they are acceptable for a certain application. Ninety percent of the chips in the population are acceptable.

**Engineering science N4**

Calculate the angle of projection of a projectile in order to hit a target 12km away.the initial velocity is 700m/s ant the time of the flight is 80seconds.

**Engineering science N4**

A ship is 100km north-west of cape town harbour and it sails directly north at a velocity of 30km/h in 8 hours.calculate its resultant speed with reference to the cape town harbour in magnitude and direction.

**Accounting, TAX**

Which of the following entities may not use the cash method of accounting? A partnership with average annual gross receipts in excess of $5 million. A C corporation whose average annual gross receipts for the preceding 3 taxable years do not exceed $5 million. A C corporation ...

**materials science engineering**

Identify the [221] vector.(crystallographic directions qns) The answer given corresponds to 0.5 in x direction,0.5 in y and 1 in z. Why is it not [1 1 0.5], the simply reduced form. The ans is the reciprocal of [221], which puzzles me since this is not a plane.

**english**

You've been assigned to invite a group of mechanical engineering professors to tour your facility. What type of language should you use in the invitation? A Formal language B Direct, simple language C Technical jargon D Pompous language

**intro to computers**

what type of device is characteristic of an enterprise environment? a workstation used by a retired person. a workstation used at an engineering firm. a tablet computer used by an elementary school student a notebook used by a college student

**Environmental Engineering**

The EPA requires hazardous waste incinerators to meet a standard of 99.99% destruction and removal of hazardous constituents injected into the incinerator. Determine the allowable quantity of contaminant in the exit stream if the incinerator is burning 1.0000 g/s of hazardous ...

**linear optimization**

During a summer session a student enrolls in two courses, psychology for four hours and engineering for three hours. The student wants to use the available time to amass the largest number of grade points (numerical grade multiplied by the number of hours). Students who have ...

**engineering**

In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the hydrogen ...

**engineering**

The flow system as shown in the Figure, the centrifugal pump(3500 R.P.M.) is delivering water at 100 gal/min and 70 °F into a boiler operating at a pressure of 35 psig. The water levels in the feed tank and boiler are constant. Because corrosion is expected to be negligible, ...

**engineering**

The flow system as shown in the Figure, the centrifugal pump(3500 R.P.M.) is delivering water at 100 gal/min and 70 °F into a boiler operating at a pressure of 35 psig. The water levels in the feed tank and boiler are constant. Because corrosion is expected to be negligible, ...

**Batteries - Engineering**

Here we consider instead dissolving guns (which we will assume are pure iron) with sulfuric acid. Fe+H2SO4->FeSO4+H2 It is apparent that they must use an outside source of electrical power to drive the dissolution of the iron. They use a small current so that the ...

**Solar Energy - Engineering**

In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the hydrogen ...

**Math-Algebra**

(Engineering) The current / varies as the electromotive force E and inversely as the resistance R. If in a system, a current of 20A flows through a resistance of 20 ohms with an electromotive force of 100V, find the currect that 150V will send throu+gh the system. (Navigation...

**Engineering**

In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the ...

**Engineering**

Here we consider instead dissolving guns (which we will assume are pure iron) with sulfuric acid. Fe+H2SO4->FeSO4+H2 The characters realize that their hideout has been discovered by the police and they still have a last handgun that weighs 0.25 kg to dissolve. The cops will...

**Engineering**

Here we consider instead dissolving guns (which we will assume are pure iron) with sulfuric acid. Fe+H2SO4->FeSO4+H2 It is apparent that they must use an outside source of electrical power to drive the dissolution of the iron. They use a small current so that the ...

**science(please check answers)**

Identify the choice that best completes the statement or answers the question. 1.Studies conducted in England during the Industrial Revolution have shown that children born to poor families were, on average, shorter than those born to wealthier parents. The most likely ...

**engineering**

A saturated soil sample under CU test was subjected to a confining pressure of 200 kPa with back pressure (pore pressure) of 50 kPa. What would be the value of pore pressure if the confining pressure was raised to 400 kPa without drainage? If the pore pressure parameter A is 0...

**engineering**

In a Direct Shear Test please help. 1)How do we determine the spacing between the two parts of shear box? What would happen if it is not set properly? 2) The shear and normal stress can be calculated with the corrected area considering the movement of displacement. How would ...