I have a math/engineering question?
Notice that the density (rho) has units of weight and volume. To find the weight, begin by finding the volume. For a sphere volume = 4π/3(r)³ = 4π/3(.32m)³ ≈ .1373m³ The mass is volume × density = .1373m³×1,000kg/m³ ≈ 137.3 kg The weight is m×g = 137.3kg × 9.81m/s² ≈ 1.3465 kNewtons
Mechanical engineer I have a question?
These look like equipment tags on a drawing. Equipment tag labels are not universal but are usually specific to each drawing set. Can you ask someone for the mechanical symbols and tags legend to the drawing (usually the first page in a drawing set)? This lists all of the tag labels and what they mean. As a mechanical engineer i would not expect you to memorize all of the tag labels. That being said even though they are not universal, some tags are extremely common. I recognize a few of them above: FCU: fan coil unit AHU: air handling unit EF: exhaust fan SF: supply fan ACU I must guess on but check the mechanical symbols and tags legend: air conditioning unit ACCU also a guess: air conditioning condensing unit Hope this helps.
I have a couple engineering questions...?
1. In what ways did prehistoric engineers overcome limitations of the time to perform the same functions as modern engineers? 2. Which engineering feat of the twentieth century do you feel was the most significant and what were some of the underlying principles that finally made it possible? 3. Which areas of current research do you think are going to have the greatest impact in the next ten years and how will that research affect current problems? 4. What were the attributes possessed by early engineers that would help you become a successful engineer today? Please put a number next to your answer so i can figure it out easier
I have a question in engineering, please help, I am stuck and I am really tring very hard?
Assume that the member will support a simple axial load. Thus, you can relate the stress in the fibers to the load as per the definition of stress: sigma = F/A solve for A, the cross sectional area: A = F/sigma to find the weight of the material, multiply gravity by density by length and cross sectional area, use W = g*rho*L*A And substitute: W = g*rho*L*F/sigma g, L, and F are common for all members. Sort out from those which arent W = g*L*F*(rho/sigma) To rank the materials, compare their ratios of density to yield strength. Those with a high value of rho/sigma will weigh the most. Those with low values of rho/sigma will weigh the least.
Engineering question help? sorry, i have tried all evening and can't get it...so frustrating!!?
An air compressor supplies compressed air to a receiver (storage reservoir) A pressure switch on the receiver causes the compressor to switch off when the pressure reaches 10 bar (gauge), If the temperature of the air in the receiver is 70C, at this moment calculate; The gauge pressure of the stored air in the receiver when it has cooled to 15C The mass of air in the receiver if the volume is 200 litres Note: 1m^3 = 1000 litres 1 bar = 10^5 Pa The characteristic gas constant for air is 287 JkgK Assume atmospheric pressure is 1 bar Pc = pg +pa is the formula, not sure how to work it out. I have tried the whole of this eveing and i can;t work out how to do it, i am so frustrated please help me so that i understand how to do a question like this before my test :s t Thanks AGAIN guys
Important Electrical Engineering Questions?
Why is the transformer rated in KVA? Why less loss occurs when we use DC supply than AC supply? Why we are using Sinusidol wave in all electrical systems? wht is load sharing? n its importance in the power industry? why induction motor rotates while transformer does not rotate when both are fed with balance 3-phase AC. y we use 3-Phase system instead of 2 or 4 phase system?
I have ten questions for an Environmental Engineer; needed for a school project?
Hi, I have a school project due on Friday and it includes having to interview an engineer. I chose to interview an Environmental Engineer, and I have ten simple questions that I wish to ask. 1. How and why you did you become involved in environmental engineering? 2. What do you do in a typical day at work? 3. What do you enjoy most and least about your job and your career? 4. What are some of the most interesting projects you've worked on in your career? 5. How important are computers to your work as an environmental engineer? Do you use any specialized programs? If so, what are they and what do they do? 6. Is there a lot of pressure working as an environmental engineer? 7. Does your job require you to travel a lot? If so, where have you been and why? 8. Are most of your projects very interesting and immersing, or is there a lot of tedious work? 9. For the most part do you work in teams or individually? 10. What is the hardest part about your job? Thank you very much, Dani