Monday
May 20, 2013

# Homework Help: Science: Engineering

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 . We start with the classification of the degrees of freedom as "free" or "...
Sunday, May 19, 2013 at 9:13pm

physics
Name of physics book for 11 and 12.to catch engineering exam and other competetive exam
Monday, May 13, 2013 at 2:55pm

Chemical engineeing
Can someone help me with online exam ( fundamental of chemical engineering class ) ? Please eamil me ( davd_jo(at)(ya h o o )dot (com ) I'll offer money
Monday, May 6, 2013 at 5:45pm

Engineering
A physics major is working to pay his college tuition by performing in a traveling carnival. He rides a motorcycle inside a hollow transparent plastic sphere. After gaining sufficient speed, he travels in a vertical circle with a radius of 13.4 . The physics major has a mass ...
Sunday, April 28, 2013 at 11:16am

MECHANICAL ENGINEERING
Need help with some engineering math problems? 1. You wish to determine the total system efficiency of your hydraulic press that is powered by an electric motor. The characteristics of the hydraulic press are as follows: •Electric motor utilizes 5 amps under load & ...
Thursday, April 18, 2013 at 1:07am

Engineering
The power plant is to be operated in a region where the same company operates several other coal fired power plants that were all built in the 1960s. The new power plant is planned to have 500 MW energy generating capacity. The next largest plant is 50 MW and each is emitting ...
Tuesday, April 9, 2013 at 5:50pm

Engineering
The power plant is to be operated in a region where the same company operates several other coal fired power plants that were all built in the 1960s. The new power plant is planned to have 500 MW energy generating capacity. The next largest plant is 50 MW and each is emitting ...
Tuesday, April 9, 2013 at 5:47pm

Air pollution Engineering
The power plant is to be operated in a region where the same company operates several other coal fired power plants that were all built in the 1960s. The new power plant is planned to have 500 MW energy generating capacity. The next largest plant is 50 MW and each is emitting ...
Tuesday, April 9, 2013 at 5:03pm

stat probability
At a certain college, there were 780 science majors, 320 engineering majors, and 390 business majors. If one student was selected at random, the probability that they are a business major is?
Monday, April 8, 2013 at 7:38pm

engineering
Mary Williams needs to change a Fahrenheit temperature to Celsius. Use the Fahrenheit temperature of 80 degrees to test your solution.
Monday, April 8, 2013 at 4:43pm

65 chemical engineering students are from urban/suburban backgrounds. (Success is defined as a C or better in the course.) 52 of the 65 students succeeded. Another 55 students were from rural backgrounds; 30 of these students succeeded. A Is there good evidence that the ...
Monday, April 8, 2013 at 12:12am

LBCC
At a certain college, there were 780 science majors, 320 engineering majors, and 390 business majors. If one student was selected at random, the probability that they are a business major is?
Sunday, April 7, 2013 at 11:06pm

MATH
An engineering consultant bids on jobs where he can make $10000 profit. If in a certain month, he has a 20% probability of getting a contract, 30% probability of getting 2 contracts, 40% probability of getting 3 contracts, and 10% probability of getting 4 contracts, what is ... Wednesday, April 3, 2013 at 10:02pm World History How were the Byzantine's Engineering geniuses? Take two or three of their engineering feats and discuss how these marvels led to the empire's overall success. Wednesday, April 3, 2013 at 8:45pm MATH An engineering consultant bids on jobs where he can make$10000 profit. If in a certain month, he has a 20% probability of getting a contract, 30% probability of getting 2 contracts, 40% probability of getting 3 contracts, and 10% probability of getting 4 contracts, what is ...
Wednesday, April 3, 2013 at 3:50pm

civil engineering
A stone (on the edge of the roof) thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. The building is 50.0 m high, as shown in Fig. 4. Using tA = 0 as the time the stone leaves the thrower’s hand at position ○A . The ...
Monday, April 1, 2013 at 7:09am

engineering mechanics
from what height must a heavy elastic body be dropped on a floor so that after rebounding thrice it will reach a height of 16m?take e=0.5
Sunday, March 31, 2013 at 12:41pm

engineering mathematics
if on an average vessel in every 10 wrecked.find the probability that out of 5 vessels expected to arrive at least 4 will arrive safetly?
Sunday, March 31, 2013 at 2:40am

engineering physical
An elevator with a man inside, of gross mass 500KG, starts moving upwards with a costant acceleration and acquires a velocity os 2m/s after travelling a distance os 3m.Find the pull in the cables during the accelerated motion. If the elevator, before stopping, moves with a ...
Tuesday, March 26, 2013 at 12:03am

Ýndustrial Engineering
The figure shows the paths of a golf ball your friend drops from the window of her apartment and of the rock you throw from the ground at the same instant. The rock and the ball collide at x = 41.00 m, y = 17.02 m, and t = 2.94 s. If the ball was dropped from a height of h = ...
Monday, March 18, 2013 at 12:08pm

engineering mechanics
A vehicle on a monorail has a speed S = 10 m/s and an acceleration S=4m/s 2 relative to the ground reference XYZ when it reaches point A. Inside the vehicle, a 3 kg mass slides along a rod which at the time of interest is parallel to the X axis. This rod rotates about a ...
Sunday, March 17, 2013 at 12:13am

statistics
The Engineering Department Claims the Average Battery Lifetime is 500 Minutes. You wish to check whether the lifetime is different from 500 Minutes. What type of hypothesis test is it going to be?
Wednesday, March 13, 2013 at 6:35pm

Physics-VASTS
The Mass Budget: Mars Reconnaissance Orbiter Repair Mission Operational Concept Math Problem: The Mars Reconnaissance Orbiter (MRO) has encountered a failure in its High Resolution Imaging Science Experiment (HiRISE) camera. Mission Case: As the HiRISE camera contains the ...
Thursday, March 7, 2013 at 4:29pm

engineering science N4
Two ships leave port simultaneously. Ship A sails north-west at 30 km/h and ship B sails S 40 degrees W at 30 km/h. Calculate the velocity of ship B relative to the velocity of ship A.
Monday, March 4, 2013 at 1:57pm

Sound engineering
A Question of engineering about Sound. How to calculate in step by step? Thank you. The octave bands¡¦ Sound pressure levels in dB re 20 £g Pa are: Hz 57 129 220 420 1K 2K 4K 8K dB 85 95 90 80 88 70 68 72 What is the overall A-weighted sound pressure level?
Thursday, February 28, 2013 at 12:05am

Engineering Economy
What is the future worth of $1,000 in month 1,$1,040 in month 2, and amounts increasing by $40 per month through month 12, at the end of year 2 if the interest rate is 23.7631528% per year, compounded continuously? Tuesday, February 26, 2013 at 11:59am Engineering Econonmy You decide to open an IRS-approved retirement account at your local brokerage firm. Your best estimate is that it will earn 9 percent. At the end of each year for the next 25 years, you will deposit$4000 per year into the account (25 total deposits). 3 years after the last ...
Saturday, February 23, 2013 at 7:13am

Engineering Maths
help solving the ffg. differential equation: dy/dx +ytanx=y^3sec^4x
Friday, February 22, 2013 at 2:56pm

Engineering Maths
Pleas help solve the ffg. differential equation: dy/dx-(1+1/x)y=y^2
Friday, February 22, 2013 at 2:54pm

Engineering Maths
Friday, February 22, 2013 at 2:52pm

Engineering Econonmy
For your 21st birthday, your grandfather offers you a gift of $1000 today. However, you have the choice of waiting 3 years and receiving$1500 OR waiting 5 years and receiving $3000. If your money grows at a rate of 8 percent compounded annually, which alternative should you ... Thursday, February 21, 2013 at 3:51pm engineering a ship is 100km north west of cape town harbour and it sails directly north at a velocity of 30km/h in ei ght hours.calculate its resultant speed with reference to the cape town harbour in magnitude and direction Wednesday, February 20, 2013 at 2:51pm engineering Anybody knows the quiz3 of coursera "control of mobile robots"? Monday, February 11, 2013 at 2:46pm world history Explain the importance of Roman technology and engineering? Cover two separate kinds of Roman technology and engineering. Friday, February 8, 2013 at 3:10pm english (theses writing) hello! :) I am a freshman college student and I am looking for a thesis topic about civil engineering.Can you give me a topic on my thesis about civil engineering? thanks :) Friday, February 8, 2013 at 7:39am english (theses writing) Can you give us a topic on our thesis about civil engineering? Friday, February 8, 2013 at 7:29am University, Engineering Math solve the ffg. differential equations: 1. x^3 +(y+1)^2 dy/dx=0 2. dy/dx-(1+1/x)y=y^2 3. dy/dx + ytanx=y^3sec^4x Tuesday, February 5, 2013 at 10:27am Intro to Computer Engineering When solving 5x^2-50x+125=0, a space alien got x=8 for one of the two roots. What possible base could the alien be using? (Note: the coefficients are also in this base. That is 5,50,125 are all in this mystery base as well) Thursday, January 31, 2013 at 1:29pm Math A mechanical engineering student wishes to inscribe a rectangle in a quarter circle of radius 2.00 cm. Determine the dimensions of the rectangle that will give it the greatest area. length in cm = height in cm = My attempt on find the relationship between the rectangle and the... Tuesday, January 29, 2013 at 8:45am Engineering Math A Theme Park site is being designed. It will occupy a rectangular piece of land 800m by 600m. There are to be 4 particularly noisy rides. The ‘Drumbeat’ uses music which reaches a level of 95dB(A). The ‘Bigdrop’ generates screams which can reach 98dB(A). ... Monday, January 28, 2013 at 10:05am Engineering Math A Theme Park site is being designed. It will occupy a rectangular piece of land 800m by 600m. There are to be 4 particularly noisy rides. The ‘Drumbeat’ uses music which reaches a level of 95dB(A). The ‘Bigdrop’ generates screams which can reach 98dB(A). ... Monday, January 28, 2013 at 10:01am engineering the pringles manufacturing company tells you that they are switching to a potato supply that has a higher moisture content than those used previously. The new supply, after being mashed an cooked, prior to drying for pringles production, now contains 70% moisture content. they... Thursday, January 17, 2013 at 11:27am engineering Your friend, a 75 kg mountain climber is suspended from a cliff by a rope. Calculate the tension in the rope, in Newtons, when you lift your friend to safety. If the rope can withstand 1.25 kN of stress per square centimeter of cross-sectional area, what minimum diameter of ... Thursday, January 17, 2013 at 11:17am 7th grade science ASAP 1. How many chromosomes do human sex cells have? (1 point) 22 43 46 23 2. The actual genetic makeup of an organism for a particular trait is called the ______. The physical characteristic that trait gives the organisms is called the ______. (1 point) genotype; phenotype genome... Wednesday, January 16, 2013 at 8:55pm 7th grade science 1. How many chromosomes do human sex cells have? (1 point) 22 43 46 23 2. The actual genetic makeup of an organism for a particular trait is called the ______. The physical characteristic that trait gives the organisms is called the ______. (1 point) genotype; phenotype genome... Wednesday, January 16, 2013 at 8:21pm SOCIAL STUDIES URGENT!! 1. When people talk about natural resources, they usually mean (1 point) vegetation. water. minerals. all of the above 2. Geothermal energy is considered a (1 point) fossil fuel. renewable resource. nonrenewable resource. recyclable resource. 3. Minerals, coal, and natural ... Wednesday, January 16, 2013 at 1:16am 7th grade social studies Ms. Sue please 1. When people talk about natural resources, they usually mean (1 point) vegetation. water. minerals. all of the above 2. Geothermal energy is considered a (1 point) fossil fuel. renewable resource. nonrenewable resource. recyclable resource. 3. Minerals, coal, and natural ... Friday, January 11, 2013 at 6:37pm engineering mechanics A person A is trying to keep his balance while on a sled B that is sliding down an icy incline. Let mA = 78kg and mB = 25 kg be the masses of A and B, respectively. In addition, let the static and kinetic friction coefficients between A and B be μs = 0.4 and μk = 0.... Monday, December 31, 2012 at 7:58pm maths 5. There are two groups of subjects one of which contains 5 science subjects and 3 engineering subjects and the other consists of 3 science and 5 engineering subjects. An unbiased die is cast. If the number 3 or number 5 turns up, a subject is selected at random from the first... Friday, December 28, 2012 at 4:00am engineering economic Ahmad is considering investing RM2000 to Ali's project at an interest rate 6% compound annually for 5 years or investing RM2000 to Rosli at 7% per year simple interest for 5 years. From your point of view which option is better and state your reason Tuesday, December 18, 2012 at 4:45pm Biology Suppose you are a scientist trying to help people who cannot produce an enzyme needed for proper digestion. How could you use genetic engineering techniques to make transformed bacteria that produce the enzyme? Monday, December 17, 2012 at 5:17pm Fundamental Of Chemical Engineering If a sulfuric acid plant is to produce 10 ton/day of 98% sulfuric acid, How much sulfur is needed, how much air is required and how much water is used? Saturday, December 15, 2012 at 11:30am Fundamental Of Chemical Engineering If a sulfuric acid plant is to produce 10 ton/day of 98% sulfuric acid, How much sulfur is needed, how much air is required and how much water is used? Saturday, December 15, 2012 at 11:11am biology genetic engineering can provide a variety of advantages and disadvantages to today's society. what are current scientists more likely to learn from transgenic animals than from transgenic bacteria or transgenic plants? Thursday, December 13, 2012 at 2:52pm 7th grade science 1. A Punnett square shows you all the ways in which ____ can combine. (1 point) alleles eggs sperm colors 2. Mendel called plants that received different alleles for a trait from each parent ____. (1 point) hybrids dominant genotypes phenotypes 3. Which is a possible genotype ... Wednesday, December 12, 2012 at 10:27pm civil engineering the propane gas tank has an inner diameter of 1500mm and wall thickness of 15mm. If the wall is pressurized to 2MPa, determine the absolute maximum shear stress in the wall of tank. Tuesday, December 11, 2012 at 7:33am Science help needed Posted by This Girl on Thursday, December 6, 2012 at 1:41pm. 1. __________ is one type of genetic engineering, in which a normal allele is placed into a virus. (1 point) A color blind test Down syndrome Gene therapy Polygenic inheritance 2. Human insulin can be produced by ... Thursday, December 6, 2012 at 4:43pm This is Urgent Science 1. __________ is one type of genetic engineering, in which a normal allele is placed into a virus. (1 point) A color blind test Down syndrome Gene therapy Polygenic inheritance 2. Human insulin can be produced by _______, which introduces DNA from one organism into a _______... Thursday, December 6, 2012 at 2:52pm Science 1. __________ is one type of genetic engineering, in which a normal allele is placed into a virus. (1 point) A color blind test Down syndrome Gene therapy Polygenic inheritance 2. Human insulin can be produced by _______, which introduces DNA from one organism into a _______... Thursday, December 6, 2012 at 1:41pm engineering Determine the resultant force and its inclination with ox Tuesday, November 20, 2012 at 5:26am Chemical Engineering: Raoult's Law A binary mixture of benzene and styrene is kept in a closed vessel at equilibrium such that both liquid and vapor phases co-exist. The total amount of moles in the vessel is 100. The total moles of benzene that is distributed in the liquid and vapor phases is 35. The ... Sunday, November 18, 2012 at 8:36am engineering a bolt located 50mm from the center of an auto wheel is tightened by the couple shown for .10 seconds. determine the resulting angular velocity of the wheel if the wheel has a radius of gyration of 250 mm and a mass of 19 kilograms Saturday, November 17, 2012 at 3:45pm structural engineering Fig P9 shows a drawbridge being rasied by a cable EI. The structure is a loaded truss consisting of a pinned assembly of members(links) joined at their ends designed to from a rigid structure. The four joint loadings shown result from the weight of the roadway. Calculate the ... Saturday, November 17, 2012 at 3:55am Chemical Reaction Engineering The following elementary first-order reactions occur at constant density: k1 k2 A --> B --> C k1 = 5 hr-1 k2 = 4 hr-1 CA0 = 1 mol/lit CB0 = CC0 = 0 v0 = 20 m^2/min Find the maximum production rate of B in moles per minute and the optimum  for (a) a plug flow reactor... Thursday, November 15, 2012 at 12:36pm Physics An advertising firm has contacted your engineering firm to create a new advertisement for a local ice-cream stand. The owner of this stand wants to add rotating solid cones (painted to look like ice-cream cones, of course) to catch the eye of travelers. Each cone will rotate ... Tuesday, November 13, 2012 at 9:09pm operating system Case 2-2: Comparing Word-Processing Applications You see an opportunity to possibly save your company money by adopting the OpenOffice suite for the new PCs in the Engineering Department. Your boss is interested in your suggestion, but wants to see a list of pros and cons for ... Sunday, November 11, 2012 at 6:24pm engineering how many btu's does it take to raise one pound of water at 32 degrees f to the boiling point at 14.7 psia and then to steam? Sunday, November 11, 2012 at 4:08pm Engineering If you have a 300 ohm transmission line terminated with an antenna that presents a (400 ohm - j 600 ohm) load impedance: What is the normalized load admittance? (I come up with 1.5 - j 2 but am uncertain if correct) How far from the load should a short circuit stub be placed ... Saturday, November 10, 2012 at 4:33pm chemical reaction engineering Propane steam reforming over an alumina supported Ni metal catalyst: C3H8 (g) + H2O (g) → CO2 (g) + H2 (g) is proposed to follow these mechanisms: C3H8 + 2S1 ↔ C2H5-S1 + CH3-S1 (M1) H2O + 2S2 ↔ OH-S2 + H-S2 (M2) CH3-S1 + OH-S2 → CH3O-S1 + H-S2 (M3) CH3O... Tuesday, November 6, 2012 at 7:51am Engineering Problem Solving if a car can accelerate at 7 meters/second, what will its 0-60 mph time be? Sunday, November 4, 2012 at 5:40pm personal statement this is my personal statement. plese check my grammar and what other stuff i can add or remove? thanks Ever since I was a little kid and till a year ago, I really didn’t know what I wanted to be in life. I imagined myself to be a teacher when I was 8 years old. As I grew ... Friday, November 2, 2012 at 2:54pm Engineering maintenance an undamped mass spring system is with mass of 12kg and stiffness of 15N/mm,a)determine the natural frequency and the period of the free motion of the system b)determine the amplitude of displacement A and the phse shift for the initial conditions x0=2mm,v0=-1mm/s Monday, October 29, 2012 at 2:36am engineering A string is fit snugly around the circumference of a spherical hot air balloon. More hot air is added (probably by a prominent scientist’s lecture) and it now takes an additional 12.4 feet of string to fit around the circumference. What is the increase in diameter? Wednesday, October 17, 2012 at 4:43pm CVP Analysis - Business Math Engineering estimates show that the variable cost of manufacturing a new product will be$35 per unit. Based on market research, the selling price of the product is to be $120 per unit and variable selling expense is expected to be$15 per unit. The fixed costs applicable to ...
Tuesday, October 16, 2012 at 6:25pm

physics
plz tell me in which website can I get free engineering notes for first year B.E?
Tuesday, October 16, 2012 at 10:07am

Engineering Fund.
A large box whose mass is 19.0 kg rests on a frictionless floor. A mover pushes on the box with a force of 235 N at an angle 34.8° below the horizontal. Draw the box's free-body diagram and use it to determine the acceleration of the box. m/s2
Thursday, October 4, 2012 at 5:38pm

marketing
Binomial probability distributions are used in business, science, engineering, and other fields. Suppose you work for a marketing agency and have to create a television ad for Brand A toothpaste. The toothpaste manufacturer claims that 40% of the toothpaste buyers prefer Brand...
Thursday, September 27, 2012 at 1:48pm

Physics
As a civil engineering intern during one of your summers in college, you are asked to design a curved section of roadway that meets the following conditions: When ice is on the road, and the coefficient of static friction between the road and rubber is 0.077, a car at rest ...
Wednesday, September 26, 2012 at 8:31pm

Physics
A group of engineering students constructs a slingshot to launch water balloons. The angle of launch is 30° and the initial velocity of the balloon is 14 m/s. The students launch a balloon from the roof of a building and the balloon lands 42 m away from the building. How ...
Friday, September 21, 2012 at 12:29am

physics
A group of engineering students constructs a slingshot to launch water balloons. The angle of launch is 30° and the initial velocity of the balloon is 14 m/s. The students launch a balloon from the roof of a building and the balloon lands 42 m away from the building. How ...
Friday, September 21, 2012 at 12:25am

Intro T Electrical Engineering
A solid metal sphere with radius 0.430{\rm m} carries a net charge of 0.210{\rm nC} . Find the magnitude of the electric field at a point 0.112{\rm m} outside the surface of the sphere. Find the magnitude of the electric field at a point inside the sphere, 0.112{\rm m} below ...
Tuesday, September 18, 2012 at 3:25pm

electric engineering
An aircraft has a wing span of 56 m. It is flying horizontally at a speed of 900 km/hr and the vertical component of earth’s magnetic field is 0.4 m Wb/m2. Calculate the P.D between the wing tips of the air craft
Monday, September 10, 2012 at 2:50pm

engineering
a particle falling under gravity falls 39m in certain second find time required to cover the next 30 m take g=9.8
Thursday, September 6, 2012 at 12:11am

engineering
A steel cylinder has a volume of 0.26 L and holds 4 kg of water at 25˚C and 200 kPa. (a) Find the total mass and total volume of the system (cylinder + water). (b) Give the values for two EXTENSIVE properties and two INTENSIVE properties of the water.
Wednesday, August 29, 2012 at 3:54pm

General Engineering
A drag line is connected to an electric motor. Crates are hooked onto the line and dragged horizontally from one location within the factory to another across a series of rollers. There is 15° between the crate and motor and a force of 500N Each crate has a mass of 200kg. ...
Wednesday, August 22, 2012 at 5:49pm

Engineering
You have two balloons, one large (30 cm in diameter) and one small (15 cm in diameter) filled with helium. Both balloons are made of the same material (latex) and have the same unfilled material thickness (2 mm) and have a 3 cm diameter. You release both balloons at sea level ...
Tuesday, August 21, 2012 at 8:38pm

Society & Environment Engineering
Making best use of the sources available is known as____________ (Don't have any optional answers.pls help someone to get the answer)
Saturday, August 4, 2012 at 5:37am

Society & Environment Engineering
Saturday, August 4, 2012 at 5:36am

Society & Environment Engineering
Gravin communication system is followed in _____________ a) Formal Organisation b)Informal Orgamosation c)Both a & b d)None of this
Saturday, August 4, 2012 at 5:34am

Society & Environment Engineering
The art of getting work done from the people for the predefined goal is called a)Management b)Administration c)Both a & b d)None of these
Friday, August 3, 2012 at 4:16pm

Society & Environment Engineering
___________is the scientific study of human society and social interaction
Friday, August 3, 2012 at 4:08pm

Society @ Environment Engineering
Capitalism believe in___________from the government
Friday, August 3, 2012 at 4:05pm

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?
Friday, August 3, 2012 at 2:08pm

math
In how many districts ways can the letters in ENGINEERING be arranged?
Thursday, August 2, 2012 at 3:19am

English help
Question 1 Marks: 1 Davey has decided to research the history of fire engines in America. To get started he's written a list of research questions. Which of the following questions is the best research question for him to ask? a. Who holds the patent for the fire engine? b...
Wednesday, July 25, 2012 at 7:06pm

Engineering Physics
A 4kg box is compress 50 cm on a spring (k=100 N/m) and then slides across a horizontal floor. If (u=0.4) between the box and the floor 1) How much work is done by friction as the box comes to a stop? 2) Assuming the frictional force is constant, how far will the box slide ...
Sunday, July 8, 2012 at 11:24pm

Engineering Physics
At a location 4Re away from the center of the Earth, you release a 2kg object from rest. How fast is the object traveling when it is 2Re away from the center of the Earth? Re = 6.4 x 10^6 m Me = 6 * 10^24 m
Monday, July 2, 2012 at 10:39pm

Engineering Physics
You want to use a spring (k=100 N/m) to send a 500-g mass up a frictionless incline (30 degree to horizontal) to arrive at a platform 3m above the ground. How far should you compress the spring?
Sunday, July 1, 2012 at 7:05pm

Engineering Physics
You want to use a spring (k=100 N/m) to send a 500-g mass up a frictionless incline (30 degree to horizontal) to arrive at a platform 3m above the ground. How far should you compress the spring?
Sunday, July 1, 2012 at 3:24am

Engineering Science
A bullet with a mass of 28g and travelling at 300m\s strikes a body with a mass of 14kg and which can move freely. The bullet remains in the body. At What velocity will the body start to move?
Thursday, June 28, 2012 at 2:25am

Essay:)
Topic: Compare and Contrast the Tang and song dynasties China? The Tang Dynasties (June 18,618-June 4,907)was an imperial dynasty of china preceded by the Sui Dynasty and followed by the Five Dynasties Ten Kingdoms period. It was founded by the cifamily. In chinese history, ...
Wednesday, June 13, 2012 at 3:25pm

Art
Could you please check if everything is correct? Thank you. 1) In 1986, Eric Drexler published “Engines of Creation”, a scientific dissemination in which shows not only the theoretical bases of nanotechnology, but also a series of speculation about the possible ...
Monday, June 11, 2012 at 1:22pm

Art
Could you please check scientific English in this short dissertation? Thank you, Ms. Sue. 1) Conrad Waddington introduced the term epigenetics in the early 1940s. He defined epigenetics as ‘‘the branch of biology which studies the causal interactions between genes ...
Thursday, June 7, 2012 at 6:52pm

engineering material
1. Explain the difference between ‘eutectic’ and ‘eutectoid’. 2. Explain the terms ‘hyper-­‐ and hypoeutectoin ’and ‘hyper-­‐ and hypoeutectic
Monday, May 28, 2012 at 3:57am

Engineering science
A stone is thrown down a well at a velocity of 20m/s. If the well is 20m deep, calculate the time taken for the stone to reach the bottom of the well.
Sunday, May 27, 2012 at 4:17pm

Science
Here are the other sentences on the same theme I urgently need you to check. I hope you can help me. Thank you. 1) The existence of complex molecular structures present in every living system is used by Drexler to show the theoretical possibility of the design and construction...
Friday, May 25, 2012 at 5:04pm

english
I wrote an essay because i'm apply to get into the honor's program. I'm supposed to write about who i was, who i am now, and who I would like to be. I would appreciate it if I got some feed back along with grammar correction. Is my essay even close to being okay or...
Tuesday, May 22, 2012 at 1:12am

ethic
Contrast utilitarian and deontological approaches to a dilemma involving genetic engineering.
Sunday, May 20, 2012 at 7:58pm

Desktop publishing-Elements of Design
Well i took this test and failed. This is the last test and i graduate. I posted [my answers] to the ones i think are right. 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 ...
Sunday, April 29, 2012 at 11:41am

Engineering Calculus
f(x)=((6x-3)/(x+6)) how do you find the intervals of decreasing and increasing...I found that there were no critical points yet I was also correct that the function increased (-I,-6) and (-6,I). I was wrong that there were no decreasing intervals though.
Saturday, April 28, 2012 at 8:11pm

computer network engineering
a steel ball weighing 128 lb is suspended from a spring, whereupon the spring is stretched 2 ft from its natural length. the ball is started in motion with no initial velocity by displacing it 6 in above the equilibrium position. assuming no damping force, find an expression ...
Sunday, April 22, 2012 at 3:44am

engineering science
a bale of weight 200 newtons hanged at the end of a rope.find the acceleration of the bale if the tension in the rope is 200 newtons,150 newtons,300 newtons.
Tuesday, April 17, 2012 at 5:23am

engineering science
The spherical side mirror on a car is convex and has a radius of curvature of 25 cm. Another car is following, 20 m behind the mirror. If the height of the car is 1.6 m, how tall is its image?
Monday, April 16, 2012 at 4:56am

Engineering
What is the upper tripper point (UTP) of a comparator with hysteresis if R1 = 47 kÙ, R2 = 68 kÙ and the maximum positive output voltage is 10V?
Monday, April 9, 2012 at 8:40pm

Engineering
A certain OTA with a transconductance of 5000 µS has a load resistance of 10 kÙ. If the input voltage is 100 mV, what is the output current? What is the output voltage?
Thursday, April 5, 2012 at 12:12pm

engineering mechanics
A car is travelling on a banked circular racetrack, Given that the track is banked at an angle of 16degree to the horizontal and the radius of the track is 50 metres and there are no friction forces present a) draw a free body diagram of the car b)calculate the linear velocity...
Thursday, April 5, 2012 at 6:17am

engineering mechanics
An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c...
Thursday, April 5, 2012 at 6:16am

engineering mechanics
An exercise bicycle's flywheel is 30cm in diameter and 2.5 cm thick and is constructed from steel (density=7850 kg m3) its moment of inertia is 0.156 kg m2 about its axis of rotation a) calculate the mass of the flywheel b) calculate the flywheel's radius of gyration c...
Wednesday, April 4, 2012 at 2:26pm

engineering mechanics
A car is travelling on a banked circular racetrack, Given that the track is banked at an angle of 16degree to the horizontal and the radius of the track is 50 metres and there are no friction forces present a) draw a free body diagram of the car b)calculate the linear ...
Wednesday, April 4, 2012 at 2:25pm

Finance (Engineering Economics)
You wish to retire at 60 and, at the end of each month thereafter for 25 years, to receive $6,000. Assume that you begin making monthly payments into an account at age 23 and continue these payments until age 60. If the annual interest rate is constant at 12 percent, how much ... Wednesday, April 4, 2012 at 11:06am engineering 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 English 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 nutrition 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 English 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 English 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 engineering 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 engineering 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 MATH THE HOSTEL OF AN ENGINEERING INSTITUTE HAS 320 STUDENTS AND THE FOOD STOCK FOR 80 DAYS. IF 20 STUDENTS LEAVE THE HOSTEL AFTER 20 DAYS,FOR HOW MANY MORE DAYS WILL THE FOOD LAST? Sunday, February 26, 2012 at 1:06am engineering 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

Science/English
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

English
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

English
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

Chemistry/Engineering
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

Engineering
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

Engineering/Physics
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

Engineering
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

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) - (...
Saturday, February 11, 2012 at 9:59pm

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) - (...
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

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? 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

English
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

Engineering/Chemistry
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

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