March 30, 2015

Homework Help: Science: Engineering

Recent Homework Questions About Engineering

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Why people need to be engineering
Tuesday, April 3, 2012 at 8:21pm

computer science
You have been working for the XYZ Computer Corporation as an entry-level software engineering since you graduated from college last May. You have done very well so far; you are respected by management, well liked by your fellow employees , and have been assigned to a team of ...
Thursday, March 29, 2012 at 12:08pm

Writeacher, I need your help to check a few things. Thank you. 1) At the first time Clare didn't say if she was free, but the next day she confirmed she was able to go to the cinema. (Can you check this sentence for me?) 2) I would like to enrol at the faculty of ...
Thursday, March 22, 2012 at 1:15pm

Making a transceiver from sccrtah is a pretty awesome project. It can take a while, though.There's a lot of theory of operation that factors in physics and engineering.I'm a radio technician, so I'm biased, but if I were a science teacher I would be amazed if ...
Wednesday, March 21, 2012 at 8:48pm

As Writeacher is on holiday, I need someone of you, Ms Sue, to check my paragraph. In particular, sentence 1 (?) "he had daydreamed" and sentence 2 (the whole sentence). I really hope you can help me. 1)In Chapter ten Dr Jekyll comes to the realization of the ...
Monday, March 19, 2012 at 9:42am

Ms Sue, here is the second and last part, concerning Stevenson's biography. Thank you very much for helping me. 1) Robert Louis Stevenson was born in Edinburgh in 1850. He spent most of his childhood in bed because of his poor health and grew up under the influence of his ...
Sunday, March 18, 2012 at 4:40pm

Engineering Science (Physics)
A platinum coil has a resistance of 3.146(ohms) at 40'C and 3.767(ohms) at 100'C. Find the resistance and the temperature coefficient of resistance at 0'C. Thanks in anticipation
Wednesday, March 14, 2012 at 4:26pm

health informatics
how is emerging technology influencing healthcare? and give an example. all what i know is that they are basiclly new technologies and my example is about tissue engineering but the problem is that i don't know how it influences the healthcare!!! so please please your ...
Saturday, March 3, 2012 at 4:02pm

in a hydralic jack 1:5 ratio piston diameter,and we apply a fofce of 25kg,what can it lift.
Tuesday, February 28, 2012 at 3:51pm

A steady, two-dimensional velocity field is given by V = (u, v) = (1.35 + 2.78x - 0.896y)i + (3.45x + cx - 2.78y)j Calculate constant c such that the flow field is irrotational.
Monday, February 27, 2012 at 8:15pm

Sunday, February 26, 2012 at 1:06am

Sketch one face of a simple cubic unit cell of side a for the case when the maximum fraction of the lattice in volume is filled with atoms, and each atom is approximated by a hard sphere. (ii) What is the radius of each atom in terms of a? (iii) What is the volume of each atom...
Sunday, February 19, 2012 at 9:24am

Math, mathematics of finance
I am stuck on these two math questions. If nyone could help me solve them it would be greatly appreciated! Here is the information: Engineering estimates indicate that the variable cost of manufacturing a new product will be $35 per unit.Based on market research, the selling ...
Saturday, February 18, 2012 at 1:23pm

Writeacher, now that the grammar is OK, I just want to know if everything is correct from a scientific point of view. Could you please ask your science teacher, Bob Pursley? 1) After meeting with the engineer ......... we became interested in exploring the problems of water ...
Wednesday, February 15, 2012 at 12:51pm

I tried to reduce the sentences myself though I think you still need to revise it. Thank you very much. 1) We decided to create an effective and inexpensive filter using knowledge of genetic engineering. 2) In particular, we prepared (have prepared)a genetically modified ...
Wednesday, February 15, 2012 at 10:10am

Here is a presentation entitled "treatment plant from arsenic and pathogenic bacteria". I don't know how to check it as I'm not familiar with the content. I'd like you to help me check the grammar. The paragraph contain long-winded sentences with no ...
Wednesday, February 15, 2012 at 7:57am

A 25 gram sample of CT is vaporized and used to fill a 5 L container. If the pressure in the container is 1.2 atm at 27 degrees Celsius, what is the molecular weight of CT in grams per mole? I used PV=nRT and found n=.2437 mol, but how do I got to grams per mole? CT is a made-...
Tuesday, February 14, 2012 at 2:12pm

The angular velocity of a rigid body rotating about an axis of rotation is w = 5^i + 2^j - 4^k rad. per. sec. Determine the linear velocity of point B on the body with a position vector r = 3^i - ^j + 3^k ft. directed from a point on the axis of rotation. Would the solution ...
Sunday, February 12, 2012 at 9:43pm

A force F = 7^i + 6^j - 5^k lb. acts at the origin. Find the magnitude and direction cosines of the moment of this force about point A (-4; 5; 6) ft So in this case wouldn't vector r= -4i +5j +6k and vector F = 7i + 6j - 5k lb? and r X F = -61i +22j -59k = MA [MA]= 87.67 ...
Sunday, February 12, 2012 at 3:30am

A force of 26 lb. acts through a point (4; 5; -7) ft. and is equally inclined to the positive ends of the orthogonal axes. What is the moment of this force about the origin So i'm assuming vector r is 4i+5j-7k? And using the fact that cos^2α + cos^2β + cos^2γ...
Sunday, February 12, 2012 at 1:07am

Calculate the moment about a point (5; 4; 3) ft. caused by the forces P = 3^i - 2^j - 4^k lb. and Q = 5^i + 7^j - 2^k lb. acting at the points (7; 2; -2) ft. and (-3; -2; 5) ft., respectively. What I did was this; vector r1= (7,2,2) - (5,4,3) = 2i-2j-5k vector r2= (3,2,5) - (...
Saturday, February 11, 2012 at 9:59pm

Calculate the moment about a point (5; 4; 3) ft. caused by the forces P = 3^i - 2^j - 4^k lb. and Q = 5^i + 7^j - 2^k lb. acting at the points (7; 2; -2) ft. and (-3; -2; 5) ft., respectively. What I did was this; vector r1= (7,2,2) - (5,4,3) = 2i-2j-5k vector r2= (3,2,5) - (...
Saturday, February 11, 2012 at 9:51pm

Physics/ Engineering
Calculate the moment about a point (5; 4; 3) ft. caused by the forces P = 3^i - 2^j - 4^k lb. and Q = 5^i + 7^j - 2^k lb. acting at the points (7; 2; 2) ft. and (3; 2; 5) ft., respectively. What I did was this; vector r1= (7,2,2) - (5,4,3) = 2i-2j-5k vector r2= (3,2,5) - (5,4,...
Saturday, February 11, 2012 at 9:30pm

100 lb of loose gravel can fill a 1-ft^3 box. Its specific gravity is 2.68. What is the dry rodded weight? Find the volume of voids in the preceding problem.
Friday, February 10, 2012 at 6:52pm

engineering science
a boat can sail at 27 m.s in still water. the boat must cross a river that flows at 9 m.s towards the east . if the boat crosses the river by going up stream at an angle of 23 south, what will the size and angle of the resulting velocity be?
Thursday, February 9, 2012 at 7:25am

elements of design
1. Study the following sentence, then select the answer that best describes it. THE COW JUMPS OVER THE MOON! A. Italic serifed type B. Bold roman sans serif type C. Bold italic sans serif type(my answer) D. Bold roman serifed type 2. Which one of the following statements about...
Tuesday, February 7, 2012 at 1:37pm

Here is the second part of the school description I need to translate. Some words are unclear and the sentences are too wordy. I need your help to improve them. 1) third branch includes the study of two foreign languages: English and French and addresses to all those who wish ...
Monday, February 6, 2012 at 8:09pm

electrical engineering
Input range: -100mV to +60mV Voltage supplies to the op-amp= ±15V how do we find the input offset voltage?
Friday, February 3, 2012 at 1:20am

Milk is flowing through a heat exchanger at a rate of 2000kg/h. he heat exchanger supplies 111,600kJ/h. The outlet temperature of the product is 95C. Determine the inlet temperature of the milk. The product specific heat is 3.9kJ/(kg*C)
Tuesday, January 31, 2012 at 3:31pm

engineering science
If a person has a mass of 83 kg, what will that person weigh in newton
Tuesday, January 31, 2012 at 11:57am

engineering science
A 250 cc motorbike must accelerate from rest to 126 km/h in 150 m in 10 seconds. Draw a velocity/time graph of the movement. (Hint: change km/h to m/s
Tuesday, January 31, 2012 at 11:51am

an airplane was moving with a velocity equal to 300 mph when the velocity was increased with uniform acceleration to 600 mph in 5 min. calculate the number of miles the airplane traveled during that interval of time
Sunday, January 29, 2012 at 5:56pm

mechanical engineering
A railroad car that weighs 20,000 lb is traveling eastward with a velocity whose magnitude is 5fps. A second car, on the same track, that weighs 40,000 lbs also traveling in an easterly direction with a velocity of 7.8fps. When the cars collided, they became coupled together ...
Sunday, January 29, 2012 at 4:52pm

basic engineering electricity
At what current drain does the ampere-hour Energizer d cell drop to 75% of its value at 25mA?
Sunday, January 29, 2012 at 1:48pm

industrial electronics N2
Hi, i'm seriously need your help on this subject just to explain the basics, chapter by chapter. i registered a part-time Electrical Engineering and placed me in N2.
Thursday, January 19, 2012 at 6:37am

Calculate the moment if you were to hold a 15lb bowling ball with your arm straight out and your forearm perpendicular to your body. What is the pinnned connection
Wednesday, January 18, 2012 at 8:16pm

Draw an E-R diagram its related tables showing its integrity constraints.
Wednesday, January 11, 2012 at 6:16am

Determine the units of viscosity,m, in the following equation: t=m(du/dy), where t is a shear stress, u a velocity, and y is a distance in (a) the Engineering English system, and (b) the SI system.
Wednesday, January 4, 2012 at 3:56pm

computer engineering
what is optical fiber cable?
Sunday, December 11, 2011 at 6:07pm

math engineering
) ∫_(-1)^2 ∫_0^6▒〖x² sin⁡(x-y)dxdy= 〗 ∫_0^6 ∫_(-1)^2▒〖x^2 sin⁡(x-y)dydx〗 determine whether the statement is true or false. If it is true, explain why. If it is false, explain why or give an ...
Saturday, December 10, 2011 at 2:29am

environmental engineering /hydrology
estimate the volume of water that will infiltrate into a soil before surface saturation occurs using the Green-Ampt equation.The following data are known ; 1-saturated moisture content is 0.25 2-the initial moisture content is 0(zero) 3-the average rainfall rating is 2 in./hr ...
Tuesday, December 6, 2011 at 3:38pm

An engineering company believes it has developed a faster way to complete the assembly of an industrial machine. The present process takes an average of 6.5 hours to complete and the times it takes to complete the process are approximately normally distributed. If the mean ...
Tuesday, November 29, 2011 at 12:20am

1. The problem statement, all variables and given/known data I am using a Vishay strain indicator with it hooked up to a strain gage hooked up 1" away from the wall on the solid beam. The beam is .5" by .5", and it is solid. The beam is 16" long and I am ...
Thursday, November 17, 2011 at 7:26pm

A 2kg piece of gold metal at 90 C is placed in 5 liters (=5kg) of water at 30 C. Determine the final temperature (Tf).
Wednesday, November 16, 2011 at 7:01pm

Materials Engineering
Can someone please tell me what material is used for the an electric window switch (the part that the driver presses)?
Tuesday, November 8, 2011 at 1:43pm

Problem 1: A long embankment is located on a soil profile consisting of 4m of medium clay followed by 8m of medium to dense sand on top of bedrock. A vertical settlement of 5mm at the center of the embankment was measured during construction. Assuming all the settlement is ...
Sunday, November 6, 2011 at 3:28pm

I need help in my homework concerning Fire Science Engineering. Acetone is released into the diked area surrounding its storage tank. The dike measures 40 feet long by 30 feet wide. What heat is the Heat Release Rate should it catch on fire? This help will be appreciated. Thanks.
Saturday, November 5, 2011 at 10:19pm

I need help with homework in Fire Engineering. What flame height would result from a 3 megawatt fire located in the corner of a compartment? This help will be appreciated. Thanks.
Friday, November 4, 2011 at 5:33pm

I need help with my Fire Engineering homework. What is the heat release rate of a flame measuring five feet in height assuming the flame is in the center of a room?
Friday, November 4, 2011 at 5:31pm

R. C. Droid has developed a new computer. He calls it the Droid computer. Mr. Droid has virtually every aspect of his new company well underway except for his sales force. He has not yet hired any salespeople to sell the Droid computer. Mr. Droid believes that any person with ...
Friday, November 4, 2011 at 1:42pm

I need help with a Fire Science Engineering homework. A fuel has heat of combustion equal to 30 kj/g. How much energy is released when 5 kilograms are oxidized? Assuming the fuel is reacted in 10 minutes, what is the average heat release rate for the fire? This will be greatly...
Wednesday, November 2, 2011 at 5:40pm

-From the following two linear homogeneous algebraic equations:(sqr= square root) (1) B*sin(kl/sqr2) = D*sin(kl) (2) (k/sqr2)*B*cos(kl/sqr2) = (k)*D*cos(kl) -Form matrix of these 2 equations and solving the determinant=0 will lead to: (1/sqr2)*cos(kl/sqr2)*sin(kl) - sin(kl/...
Sunday, October 30, 2011 at 3:06am

I am studying Fire Science Engineering. I have a question concerning my homework. The question is A compartment measures 3 meters by 5 meters and is 2.8 meters high. A fire raises the temperature from 20 degrees C to 1000 degrees C. If the starting pressure was one atmosphere...
Saturday, October 29, 2011 at 11:48pm

Is genetic engineering the answer to ending global hunger?
Friday, October 28, 2011 at 6:43am

Can someone edit this essay? Topic is "if given funding for a small engineering project, what would you do?" 250 word limit Millions of Americans purchase bottled water everyday simply because they don't like the taste of their own tap water. While most Americans...
Wednesday, October 26, 2011 at 9:24pm

The 50-kg stone has a speed of v_A = 8m/s when it reaches point A.Determine the normal force it exerts on the incline when it reaches point B. Neglect friction and the stone's size.
Wednesday, October 19, 2011 at 4:04am

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

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

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

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

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

: 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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