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October 20, 2014

Homework Help: Science: Engineering

Recent Homework Questions About Engineering

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physics
Your engineering firm is asked to specify the maximum load for the elevators in a new building. Each elevator has mass 500 kg when empty and maximum acceleration 2.25 m/s^2. The elevator cables can withstand a maximum tension of 19.6 kN before breaking. For safety, you need to...
Friday, October 14, 2011 at 12:19am

Engineering Statistics
"A study has shown that 20% of all college textbooks have a price of $90 or higher. It is known that the standard deviation of the prices of all college textbooks is $9.50. Suppose the prices of all college textbooks have a normal distribution. What is the mean price of ...
Tuesday, October 11, 2011 at 3:13pm

engineering
A slotted bar is attached to the origin and rotates in the horizontal plane with a constant angular velocity of 0.665 radians/s . The bar moves a roller weighing 33.6 lb along the cam's perimeter. A spring holds the roller in place; the spring's spring constant is 1.34...
Tuesday, October 11, 2011 at 12:40am

Engineering Economics
Sales of bottled water in the U.S totaled 16.3 gallons per person in 2004. Water costs .40 cents per bottle.A municipal company provides tap water for $2.10 per 1000 gallons. If the average person drinks two bottles of water per day or uses 5 gallons per day in getting that ...
Monday, October 10, 2011 at 7:28pm

MATH
At McLeod University, thirty percent of the students are in Engineering. Forty percent of Engineering students study Probabilistic Systems, and sixty percent of the students studying Probabilistic Systems are in Engineering. What percentage of students at McLeod are either in ...
Thursday, October 6, 2011 at 8:22pm

English
What do you thing of an exercise on reporting verbs like the one that follows? I'm postin you just some examples. Put the following into the indirect speech using a suitable reporting verb. 1) "You took my money", he told Emma. 2) "I think you should do ...
Tuesday, October 4, 2011 at 10:18am

statistics
At a certain college, there were 400 science majors, 100 engineering majors, and 600 business majors. If one student was selected at random, the probbility that they are an engineering major is
Saturday, October 1, 2011 at 10:47am

engineering science
A ramjet is to propel an aircraft at Mach 3 at high altitude where the ambient pressure is 8.5 kPaand the ambient temperature T-node is 220 K. The turbine inlet temperature T is 2540 K. If all components of the engine are ideal - that is, frictionless - determine (a) the ...
Thursday, September 29, 2011 at 1:10am

engineering
: The coat hanger shown below is made of PVC (polyvinyl chloride). The neck of the hanger is 0.010 m in diameter and is 0.10 m long. If a coat hangs on the hanger, the length of the neck will increase by 1.00 x10 -5 m. 1. What is the mass of the coat? 2. How many such coats ...
Wednesday, September 28, 2011 at 11:47pm

statistics
at a certain college, there were 700 science majors,100 engineering majors and 500 business majors. if one student was selected at random, the probability that they are an engineering major is?
Tuesday, September 27, 2011 at 12:15pm

Physics
Engineering 100 Homework Problem #1 Below is a diagram of a beam supported on the left end by a pin connection, and toward the right side by a simple fulcrum. A force F is applied to the far right end of the beam as shown. The uniform beam has mass, m, length, l, and the ...
Tuesday, September 27, 2011 at 1:41am

engineering physics
An object of mass m is dropped at t=0 from the roof of a building of hdight h. A wind blowing parallel to the face of the building exerts a constant force F on the object. At what time t does the object strike the ground? Express t in terms of g and h.
Sunday, September 25, 2011 at 10:43pm

engineering
A cylinder has 500 cm^3 of water. after a mass of 100 grams of sand is poured into the cylinder and all air bubbles are removed by a vacuum pump, the water level rises to 537.5 cm^3. Determine the specific gravity of the sand?
Wednesday, September 21, 2011 at 10:19am

Engineering
It is found that ozone reaction in water nearly follows first-order kinetics in ozone concentration decreases by 50% in 12 minutes (t1/2 = 12 min). A water supplier wants to inject ozone into a pipe bringing water to thee water treatment plant to pre-disinfect the influent. ...
Monday, September 19, 2011 at 9:37pm

Environmental Engineering
Consider the air over a city to be a box 100km on a side that reaches up to an altitude of 1.0 km. THe air is blowing into the box along one of its sides with a speed of 4 m/s. Suppose an air pollutant with a reaction rate of K = 0.20/hr is emitted into the box at a total mass...
Monday, September 19, 2011 at 9:36pm

engineering
The velocity of a sports car is graphed as a function of time . Use the graph to answer the questions. a) Find the sports car’s maximum velocity, , during the 10- interval depicted in the graph. b) During which time interval is the acceleration positive?
Monday, September 19, 2011 at 8:51pm

Environmental Engineering
A bankrupt chemical firm has been taken over by new management. On the property they found a 20,000 m3 brine pond containing 25,000 mg/L of salt. The new owners propose to flush the pond into their discharge pipe leading to the Atlantic Ocean, which has a salt concentration ...
Friday, September 9, 2011 at 6:35am

ap biology
how has genetic engineering modified darwins theories?!?
Wednesday, September 7, 2011 at 9:44pm

engineer
If you possess a recognized diploma in marine engineering, will working onboard a ship as a marine engineer a better choice compared to working at shipyards or on land as a sales engineer in term of salary, freedom, risk, nature of job and area of job scope. Please help. Thanks!
Tuesday, September 6, 2011 at 4:04pm

Physical Education
Preliminary design of a compressor drive train Determine the force-time function within the compressor’s cylinder and the torque-time function acting on the input shaft on the compressor during any cycle. Given: Compressor speed is 1500rpm. The compressor has a bore of 3....
Wednesday, August 24, 2011 at 6:33pm

engineering
Does winmax interfare with each other if they comes in contact?
Sunday, August 21, 2011 at 7:58am

engineering
what is civil engineering?
Sunday, August 21, 2011 at 2:01am

basic electrical engineering
a battery havibg an emf of E volt and internal resitance .1ohm is connected across the treminals A and B. Calculate the value of E inorder that the power dissipated in the 2 ohm resistoe is 2 watt
Saturday, August 13, 2011 at 1:25am

Math (Statistics)
Five college engineering students are choosing specialized fileds of engineering to study. Each student is allowed to select 1 field. The available fields are Electrical Engineering (EE), Mechanical Engineering (ME), and Computer Engineering (CE). If the second student does ...
Thursday, August 4, 2011 at 6:02pm

engineering
How has hydraulic engineering altered local and regional environments?
Sunday, July 31, 2011 at 12:18pm

engineering
which problem occur in distillation tower?
Thursday, July 28, 2011 at 11:48pm

Economics
Engineering Economics Essay 1: You wish to purchase a home for $150,000 and you can put down 10% of this price as down payment. You can get a 20 year fixed rate mortgage loan for 6.0% with no points. You can optionally decide to pay 2 points to bring the mortgage rate down to ...
Saturday, July 9, 2011 at 8:11am

business
Engineering Economics Essay Question: You wish to purchase a home for $150,000 and you can put down 10% of this price as down payment. You can get a 20 year fixed rate mortgage loan for 6.0% with no points. You can optionally decide to pay 2 points to bring the mortgage rate ...
Saturday, July 9, 2011 at 8:09am

Law
I have to find key political words for this newspaper article so please check whehter the words i listed is right in the bottom and if there is anything i should add: Government contributes $9m for soldier protection Published on Tue, 14/06/2011, 11:45:04 (No Author Stated) ...
Wednesday, July 6, 2011 at 5:48pm

Engineering Math
solve the 1st differential equation: y1+4y=cos(x) with intial condition y(pie/3)=1
Friday, June 24, 2011 at 2:26pm

science
importance of ict in electrical electronic engineering
Wednesday, June 22, 2011 at 6:45am

science
importance of ict in electrical electronic engineering
Wednesday, June 22, 2011 at 6:44am

managerial finance
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 important, as it is a major factor ...
Sunday, June 12, 2011 at 2:00pm

Genetic engineering and Gene splicing
what's the difference between genetic engineering and gene splicing?
Monday, May 23, 2011 at 7:36pm

Engineering Maths
A perfectly cylindrical container standing upright with a top and bottom (an oil drum or coke can for example) has an empty mass of M and a height of H. It is filled with a liquid of uniform density of variable mass m up to height h. When the container is full the centre of ...
Tuesday, May 17, 2011 at 7:16am

English
8. Name three specific "poet stereotypes" that Margaret Atwood discusses or hints at in her speech. 9. What were Margaret Atwood's very first poetry experiences? 10. What are your earliest memories of poetry? Were they similar to Margaret Atwood's first ...
Tuesday, May 10, 2011 at 6:05pm

Thermo engineering
The driveshaft of a building’s air-handling fan is turned at 300 RPM by a belt running on a 0.3-m-diameter pulley. The net force applied by the belt on the pulley is 2000 N. determine the torque applied by the belt on the pulley, in N.m, and the power transmitted, in kW.
Tuesday, May 10, 2011 at 3:18pm

engineering
How is bacteria used in genetic engineering?
Sunday, May 8, 2011 at 11:57pm

Engineering
A 50 lb bar rotates clockwise 2 rad/s. The spring attached to its end always remains vertical due to the roller guide at C. If the spring has an unstretched length of 2 ft and a stiffness of k=6lb/ft, determine the angular velovity of the bar the instant it has rotated 30 ...
Sunday, May 1, 2011 at 8:05pm

engineering
What is the reason when you may receive only 2G insted of 3G.
Sunday, May 1, 2011 at 5:58am

engineering
does anyone know how can I measure collagen's diameter in tissue using what kind of a microscope
Tuesday, April 12, 2011 at 12:23am

engineering
when i do imaging of tissue to look at collagen structure using a 2 photon microscopy, but im not familiarized with the methods to measure the diameter of the collagen and the area occupied by it. Does anyone know how do researchers measure them
Saturday, April 9, 2011 at 8:18pm

CHEMISTRY
The chemical and engineering properties of cement are very important in the construction industries. One of the four principle chemical compounds in Portland cement in tricalcium silicate, 3CaO.SiO2. Calculate its molecular/formula weight?
Tuesday, April 5, 2011 at 3:54am

engineering
To make a pocket warmer from sodium acetate and vinyl, how do you estimate how many grams to use? to work out the 'q' is it the heat capacity of the water it is dissolved in that you use? What temperature do you want it to get to and how do you factor in the heat ...
Thursday, March 31, 2011 at 4:37pm

materials engineering
for: prismatic non-circular section channel which used for window frames and for ducting for electrical wiring..I need to know : 1-function 2-objective 3-constraints how can we select the materials for this design, and why? what suitable processes for manufacturing?
Friday, March 18, 2011 at 4:10am

materials engineering
for: prismatic non-circular section channel which used for window frames and for ducting for electrical wiring..I need to know : 1-function 2-objective 3-constraints how can we select the materials for this design, and why? what suitable processes for manufacturing?
Thursday, March 17, 2011 at 5:19pm

Environmental engineering
If the BOD5 of a waste is 220 mg/L and the ultimate BOD is 320 mg/L, what is the rate constant?
Tuesday, March 15, 2011 at 1:17pm

Environmental engineering
Ottawa’s anaerobic digester produces 13 m^3/day of sludge with a suspended solids concentration of 7.8%. What volume of sludge must they dispose of each year if their sand drying beds yield a solids concentration of 35%.
Tuesday, March 15, 2011 at 1:17pm

engineering mathematic
give that z = f(x,y). use partial derivatives to find δz/δx and δz/δy for xe^xz + z(xy+1)^3-sin x cos^2y=xy/z present your final answer in the simplest form.. please solve this problem....tq
Tuesday, March 15, 2011 at 11:33am

engineering mathematic
using triple integral, find the volume of the solid bounded by the cylinder y^2+4z^2=16 and planes x=0 and x+y=4. please help to solve this problem
Tuesday, March 15, 2011 at 9:19am

Mechanical Engineering Sci.
Use the parallelogram of forces method to determine the magnitude and direction of the resultant of the forces given:1.7N at 45 and 2.4N at -60.
Tuesday, March 15, 2011 at 6:45am

engineering
Design a packed tower for the absorption SO2 from air. The SO2 feed contain 0.0016 mol frac A into pure water in column that is 1.5 m2 cross sectional area and 3.5 m in height. The flow rates of entering gas and liquid are 111.5 kmol/h and 3860 kmol/h, respectively. The outlet...
Saturday, March 12, 2011 at 8:11am

Statistics
A roster contains the names of 12 students from the School of Math, Science and Engineering (MSE) and 8 students from the Dreeben School of Education (DSE). Determine the probabilities of randomly selecting the following if the selection is done without replacement: A) An MSE ...
Monday, March 7, 2011 at 9:11pm

material engineering
thanks. OK, for the design requirements: is the objective: to minimize the mass of cans? are the constraints: thickness of can is specified, and the can should not fail(strong), or what?
Monday, March 7, 2011 at 6:45pm

engineering
If a pogo stick was to be reinvented and you were to choose the spring type. What type of spring will generate the most return of kinetic energy compared to least amount of force needed to compress the spring...you can use leaf, coil, scissor, compression, or extension type ...
Monday, March 7, 2011 at 3:22pm

material engineering
Thank you so much drwls ... please, Do you mean is also possible to choose tin-coated steel for (Beverage cans)? Because it is required to choose more than one metal and compare them in terms of cost, attributes and manufacturing process, and then chose the most appropriate.
Monday, March 7, 2011 at 7:32am

material engineering
I need help for this product. beverage can (e.g;for fizzy drinks).. for this product : 1- What is the appropriate metal for the manufacture of this product.? 2- How can we choose the right manufacturing process? 3-Which material selection charts I must used?
Monday, March 7, 2011 at 4:11am

food engineeirng
i intend to take the course of food engineering.may i noe tat is food engineering more suitable to bio or physics students?
Monday, February 28, 2011 at 11:25am

Environmental engineering
The company you work for plans to release a waste stream containing 7 mg/L of benzaldehyde . Assuming that benzaldehyde degrades according to the reaction: C7H6O + 8O2 → 7CO2 + 3H2O Calculate the theoretical carbonaceous oxygen demand of this waste stream in mg/L.
Saturday, February 26, 2011 at 11:51pm

Engineering Physics
A 1.0-kg block is released from rest at the top of a frictionless incline that makes and angle of 37 degrees with the horizontal. An unknown distance down the incline from the point of release, there is a spring with k=200 N/m. It is observed that the mass is brought ...
Thursday, February 24, 2011 at 10:44pm

Environmental engineering
(10 Points) A contractor is trying to estimate the distance to be expected of a drawdown of 4.81 m from a pumping well under the following conditions: Pumping rate = 0.0280 cubic meter per seconds Pumping time = 1066 d Drawdown in observation well = 9.52 m Observation well is...
Wednesday, February 23, 2011 at 2:09am

Environmental engineering
Lake Kickapoo, TX, is approximately 12 km in length by 2.5 km in width. The inflow for the month of April is 3.26 cubic meter per second, and the outflow is 2.93 cubic meter per second. The total monthly precipitation is 15.2 cm and the evaporation is 10.2 cm. The seepage is ...
Tuesday, February 22, 2011 at 1:47am

applied statistics
We will employ the SPSS dataset talent.sav, which can be found in Doc Sharing, in our exploration of interpreting a One-Way MANOVA. You will need to install the PASW Grad Pack 18.0 in order to download the dataset. Open the SPSS dataset talent.sav. This dataset is composed of ...
Sunday, February 20, 2011 at 4:29am

Physics
A group of Mechanical Engineering students are attempting to pull a large crate of mass M=175.0kg on a level driveway. The coefficient of static friction ms = 0.610. They use a rope of dubious quality to pull the crate as indicated in the figure. At what angle with respect to ...
Thursday, February 17, 2011 at 1:39am

Environmental engineering
Characterize the risk for a chronic daily exposure by the water pathway (oral) of 1.34 x 10^-4 mg/kg/day of tetrachloroethylene, 1.43 x 10^-3 mg/kg/day of arsenic, and 2.34 x 10^-4 mg/kg/day of dichloromethane (methylene chloride).
Wednesday, February 16, 2011 at 10:19pm

accounting
Notified by Alex's Engineering Co that Success's bid of $9000 on a proposed project has been accepted. Alex's paid a $2500 cash advance to success systems. My question is how am i going to put or write this transaction on journal entry? Do i just ignore 9000 and ...
Wednesday, February 16, 2011 at 3:11pm

engineering physihcs
I need to create an Excel chart showing world oil reserves vs. time, which are both in columns and cannot find how to graph this in excel. thank you.
Saturday, February 12, 2011 at 7:36pm

Engineering Economics
Sensotech Inc., a maker of microelectromechanical systems, believes it can reduce product recall by 10% if it purchases new software for detecting faulty parts. the cost of the new software is 225000. 1- how much would the company have to save each year for 4 years to recover ...
Wednesday, February 9, 2011 at 10:19pm

engineering
100 lb of loose gravel can fill a 1-ft^3 box. Its specific gravity is 2.68. What is the dry rodded weight?
Saturday, February 5, 2011 at 11:04pm

chemistry
Another “grand challenge” for engineering is managing the nitrogen cycle. Use the nature of the chemical bond in diatomic nitrogen to explain why any management is needed for this biogeochemical cycle. With so much nitrogen available in the atmosphere, why are ...
Thursday, February 3, 2011 at 7:32pm

Math
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?
Tuesday, February 1, 2011 at 10:16pm

Engineering Science
A ball is thrown vertically into the air and takes 5s to return to the thrower, from time of projection. What is the time it takes to reach maximum height ?
Monday, January 31, 2011 at 9:55pm

engineering
How fast can a Farrari FXX go?
Thursday, January 27, 2011 at 3:48pm

Biology!!
Darwin is considered the "father of evolutionary biology." Four of his contributions to the field of evolutionary biology are listed below. The nonconstancy of species. Branching evolution, which impleies the common descent of all species. occurrence of gradual ...
Sunday, January 16, 2011 at 5:25pm

engineering
If faucet is dripping at a rate of one drop per second and each drop contains 0.150 milliliters. Calculate how much water will be lost in 1 year.
Friday, January 14, 2011 at 12:18am

nuclear engineering
Determine the amount of energy required (in MeV) to dissociate the following elements into component parts (protons, neutrons and electrons) • Hydrogen • Deuterium • Tritium
Thursday, January 13, 2011 at 10:57am

engineering
If a source is emitting particles at a rate of 15,000 particles per second, what is the flux at 30 cm away from the source?
Thursday, January 13, 2011 at 10:53am

English 1
Combine each set of sentences into one sentences so that it contains two independent clauses. Use a semicolon correctly between the two clauses. 1. Tesla was born in what is now Croatia and studied at the Technical University at Graz, Austria. He excelled in physics, ...
Tuesday, January 4, 2011 at 11:56am

mechanical engineering
how much is the net force required to accelerate 1000kg of a car in 5mins/sec?
Saturday, December 18, 2010 at 6:10am

engineering science
The power in a resistor RLOAD of 10 Ω when connected to a 100 volt supply is measured using a voltmeter and ammeter. There are two possible ways of connecting the meters as shown in FIGURE 2. The resistances RA and RV represent the internal resistances of the ammeter and ...
Thursday, December 9, 2010 at 7:18am

12th grade
what is genetic engineering?
Wednesday, November 17, 2010 at 5:59am

engineering practise
plz give hazards of cylinder used in gas welding and plz give information about oxy-acetylene welding..
Friday, October 22, 2010 at 2:27pm

engineering practise
plz give hazards of cylinder used in gas welding and plz give information about oxy-acetylene welding..
Friday, October 22, 2010 at 2:26pm

engineering practise
plz give me information about electrodes used in arc welding...?
Friday, October 22, 2010 at 2:23pm

materials engineering, essay topics
I have to write a research paper and here is the topic. The paper should be on the use of a new or existing material in a new or unique way. It could also llok at a new or unique way of forming or processing a material. Basically, when i say material, it means metals, polymers...
Tuesday, October 19, 2010 at 10:09pm

engineering
Using mechanics of materials principles, (i.e. equations of mechanical equilibrium applied to a free-body diagram), derive the following equations: s’ = s cos2q = s[(1+ cos 2q) / 2] t' = s sinq cosq = s [sin 2q / 2] s=sigma, q=theta, t=tau I have looked in "...
Monday, October 18, 2010 at 5:06pm

algebra/materials engineering
what phases are present in a slow cooled 1090 stell and how much of each of these phases are present? so the phases are cementite and pearlite and it's hypereutectoid. The formula is hypereutectoid=cementite(6.67%)+pearlite​(0.8%) I know in a 1090 steel, there is .9%...
Monday, October 18, 2010 at 12:09am

science
how do bacterial plasmids relate to resistance and how do they relate to genetic engineering. i am very stuck and i need help please
Sunday, October 17, 2010 at 10:47pm

11th grade
how do bacterial plasmids relate to resistance and how do they relate to genetic engineering. i am very syuck and i need help please
Sunday, October 17, 2010 at 10:45pm

Statistics
The average age of chemical engineers is 37 years with a standard deviation of 4 years. If an engineering firm employs 25 chemical engineers, find the probability that the average age of the group is greater than 38.2 years old. If this is the case, would it be safe to assume ...
Sunday, October 17, 2010 at 8:21pm

Engineering Kinematic
The particle travels along the path defined by the parabola y=0.5(x^2). If the component of velocity along the x-axis is v=5t [m/s], determine the particle's distance from the origin and the magnitude of its acceleration when t=1s. The initial condition is t=0, x=0 and y=0...
Saturday, October 16, 2010 at 4:49am

engineering
Given a firm’s demand function, P = 24 - 0.5Q and the average cost function, AC = Q2 – 8Q + 36 + 3/Q, calculate the level of output Q which a) maximizes total revenue b) maximizes profits
Friday, October 8, 2010 at 5:29am

engineering of science
What mass of oxygen is needed for the complete combustion of 8.90×10−3 of methane?
Saturday, October 2, 2010 at 2:29pm

engineering of science
What mass of water is produced from the complete combustion of 8.90×10−3g of methane
Saturday, October 2, 2010 at 1:25pm

Chemical Engineering
How much acetone liquid (in mls) is required to produce a vapor concentration of 200 ppm (parts per million) by volume in a room of dimensions 3 x 4 x 10 meters? The temperature is 25oC and the pressure is 1 atm. The following physical property data are available for acetone: ...
Tuesday, September 7, 2010 at 4:24pm

Math
Which major should Derrick pick based on the starting salary? Business: Mean: $39,000 Median: $30,000 Range: $20,000 Engineering: Mean: $35,000 Median: $34,000 Range: $12,000 Could someone explain why it would be a certain major? I don't know: I thought engineering since ...
Sunday, September 5, 2010 at 4:27pm

english
A project design has been approved by management. The engineering team is about to start production of the new line. I want to be sure this process goes by smoothly. I need to come up with a communication plan to address successful development and delivery of the new product
Monday, August 2, 2010 at 12:37pm

biology
When genetically engineering an organism, a plasmid a. is the main chromosome of the bacteria that is cloned. b. is cut with a restriction enzyme to accept the gene of interest. c. helps screen for cells that did not take up the gene of interest. d. combines with the gene of ...
Monday, July 5, 2010 at 9:50am

Computer Science
Can anyone please write a basic c++ code for the following instructions? Congratulations! You’ve been hired by the Fly-By-Night-Engineering-Company, Your new supervisor asks you to write a C++ program that will manage a list of robotic sensors, stored in an array of ...
Saturday, July 3, 2010 at 11:57am

engineering
what is the device used called for eye laser surgery and do you know which company use it
Wednesday, June 23, 2010 at 9:49pm

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