Convert Definition and 571 Threads

Hello. I am not an engineer but would really appreciate some help with a calculation for my PhD in biomedical sciences. I have a new exercise ergometer (see picture) and have been able to obtain the force applied (Newtons) to the load cells located underneath each foot pedal at 1hz. A motor...

Homework Statement The Heat of combustion of Ethane is 373 kcal/mole. Assuming that 60% of the heat is useful , how many liters of ethane,, measured at standard temperature and pressure, must be burned to convert 50.0kg of water ar 10.0C to steam at 100.0C? One mole of a gas occupies 22.4...

Homework Statement Homework Equations Please see below. 3. The Attempt at a Solution The idea is to find Bmin. We know: $$ \tau \frac{eB}{m}\gg 1 \\ \\ \rightarrow \frac{eB}{m}\gg \tau$$ Points: [1] We are given $$\tau \propto \frac{1}{T^{2}}$$ . [2] We are also given a conversion...

Hi, I was wondering if anyone could help with a vector question that I have. If I have a unit vector defined in cartesian co-ordinates as p= (0,1,0) how would I go about converting this vector to a cylindrical geometry. I understand that I will probably need to use p_r=sqrt(px^2+py^2) and...

Let's say i have an air pump which produce plenty of air flow, but almost no pressure. Is there a simple way to turn this high flow, low pressure into high pressure, low flow? I'm thinking something akin to a gearbox turning fast spin, low torque of a motor into a high torque, slow spin output...

I know 2 simple ways to convert AC into DC: Wheatestone bridge with diode is one the other is increasing the number of loops in magnetic field in DC power generation. Is there a simple way to convert DC into AC? I suppose a motor could spin a loop of wire without a commutator in a magnetic...

Homework Statement Convert the following second-order differential equation into a system of first-order equations and solve y(1) and y'(1) with 4th-order Runge-kutta for h=0.5. ##y''(t)+sin(y(t))=0,\ y(0)=1,\ y'(0)=0## Homework Equations The Runge-kutta method might be applicable, but I know...

I am working on simulating the magnus effect of lift on a spinning ball. Right now spinning on the z axis I can calculate the force effect it has on the x and y coordinates. If I am to add spin on the x do I do the exact same calculations effecting the y and z coords and just add them to the z...

If you take the spectra of a star you usually have a big primary mirror (lets say 1m) to get a lot of light, and use an exposure time usually several tens of minutes. Can one use an astronomical spectrograph for a led/arclamp light source? How does the light intensity of a star compares to...

I want to convert this system of corrdinates (see image beloow) to cartesian system. How make this? https://www.physicsforums.com/attachments/c2-png.82342/?temp_hash=1cfcfdb56cb59e415f556c06ffbe270a Tip: x = a exp(+u) cosh(v) y = b exp(-u) sinh(v)

Homework Statement A heat pump fitted with a 120W electric motor supplies 600W of heat per second to a room from outdoors. Calculate: a) the coefficient of performance of the heat pump b) the heat gained from outdoors. Homework Equations Coeff of performance for heat pump = Qin/ W =...

I want to get a input impedance from microwave. if the attanuation constant is 0.13, the value is 0.13dB/m. for get the Zin, the dB have to disappear. 0.13dB=10log(X) 0.013dB=log(X) 10^(0.013)dB=X ?? I don't sure about this solution. please help me! google didn't help me.

If I have program X how do I get it in binary form?

Hi, I have got a rather large data set and no matter how hard i look i can't find any equations to convert the data back to STC, i have both AC and DC power, all the currents and voltages and all the data sheets for the equipment. if someone could please help me find an equation to help it...

Homework Statement Use the substitution ##x=X+h## and ##y=Y+k## to transform the equation ##\frac{dy}{dx}=\frac{2x+y-3}{x-2y+1}## to the homogenous equation ##\frac{dY}{dX}=\frac{2X+Y}{X-2Y}## Find h and k and then solve the given equation Homework EquationsThe Attempt at a Solution If I...

Is it possible to convert light in the visible spectrum to infrared or microwave light. What processes would be used to do this? Thanks, EJ

Hey! :o How can we find the regular expression of a language given by an automaton M?? Could you give some hints?? (Wondering) Which are the steps that we have to follow so that we convert an automaton into a regular expression?? (Wondering)

Hey all I am a newbi and wondering how to do this conversion. When i see a water pump which is 1400G/hour at that rate what would be the psi? For example my garden hose is about 40psi and at that rate it would mean a curtain g/ph based on say a 15mm outlet radius. Im trying to figure out what...

(1) Anyone who is thin, tall and energetic will be good basketball player. (2) Some people are tall but not good basketball players. (3) Anyone who do exercise or eating healthy food will be energetic. (4) Saman is thin and tall person who do exercises. Write the above sentences in First Order...

Homework Statement Show that the given matrices are row equivalent and find a sequence of elementary row ops that will convert A into B. a = 2 0 -1 1 1 0 -1 1 1 b = 3 1 -1 3 5 1 2 2 0 Homework EquationsThe...

Homework Statement "The use of the British thermal unit (Btu) is common in much engineering work. A Btu is the amount of heat required to raise the temperature of 1 lb of water by 1°F. Calculate the number of joules in a Btu. Homework Equations "A calorie was originally defined as the amount...

Hi Folks, I have a symbolic A=18*1*18 array containing symbols/expressions. I want to populate certain entries of this array into another matrix. For example K(1,1)=A(1,1,1) I get the following ? The following error occurred converting from sym to double: Error using ==> mupadmex Error in...

I know the solution has an infinite number of solutions. It is represented as follows: x1= 4/3 + (1/3)x3 - (5/3)x4 x2= 2 + (1/3)x3 + (1/3)x4 x3= Free x4= Free How do I put the above solution into vector form as illustrated in the original question?

Homework Statement PbSO4(aq) >>> Pb(s) + PbO2(aq) + S042-(aq) Homework Equations The Attempt at a Solution PbSO4(aq) must be Pb2+(aq) SO42- But PbO2(aq) seems to have to be Pb4+(aq) + 2O-(aq) How can Pb go from Pb2+(aq) to Pb4+(aq); doesn't it have to keep the same charge?

Homework Statement the question is a particle move in a circle of radius 20cm with a linear speed of 10 m\s find angular angular velocity ! i have tried it many time's but it didn't workedHomework EquationsThe Attempt at a Solution [Moderator note: Question content moved here from second post]

Question: Convert to Sum of Products (p+q’+r+s’). (p’+q+r+s’). (p’+q’+r+s’) = ((p+q’+r+s’)’ + (p’+q+r+s’)’ + (p’+q’+r+s’)’)’ (Demorgans each Sum-Term) = ((p’.q.r’.s) + (p.q’.r’.s) + (p.q.r’.s))’ (Factor p.r’.s) = ((p’.q.r’.s) + (p.r’.s).(q’ + q))’ (Inverse Law) = ((p’.q.r’.s) + (p.r’.s))’...

Homework Statement Hey guys. So basically I'm doing some Calc I homework and I'm working on the domain of this function: g(x) = √tan(2x+π) Homework Equations Now to determine the domain, I know that the function under the root cannot be negative. The Attempt at a Solution So after...

Homework Statement a mule is pulling a load of gold on a wagon. If the mules power output is 746 watts. if in a certain time interval the total work done by the team on the wagon was 23,500,000 j, how long was that interval of time Homework Equations I think its power = work divided by time...

When my classmate report about cycloconverters. He discussed about different classifications and types of cycloconverters. He also discussed how Single-phase to Single-Phase Cycloconverters operate. But when he approached Three-Phase to Single-Phase and Three-Phase to Three-Phase...

can anyone convert the relation tan y=(Vsin(y)-gx)/Vcos(y) to an explicit function y=f(x) in terms of V, x and g? g is a constant V is the function V(x)= -aln(b/b-cx)-dx a,b,c,and d are also constants. Thanks!

I am trying to convert galvanometer into an ammeter. But after finding Galvanometer resistance and shunt values, and cut a wire according to that thickness and connected. But still, the galavanometer reading is not similar to that of the standard ammeter reading connected in the circuit. Any one...

I have a "bending stress" question, which is causing me "actual stress"... I have a solid 30m Aluminium shaft, which I need to replace with an equivalent hollow shaft, but I am having difficulty in calculating the internal and external diameters. The solid shaft diameter is 0.118m, and all I...

Can I convert an electric log spliter and use the hydrolic to create a dump lift? Using my truck and its 12 volt battery

Hi guys, I'm having a hard time with that one from Cohen-Tannoudji, ##F_{VI}## # 6. I'm translating from french so sorry if some sentence are weird or doesn't use the right words. 1. Homework Statement We consider a system of angular momentum l = 1; A basis from it sub-space of states is...

Hello, can anyone help me to convert 180 ton to kN/m ? Which formula can you use to convert this? Thanks!

Hello everyone. I have to describe is the Severn Bridge, a suspension bridge [FONT=Arial]spanning the River Severn and River Wye in England. I have found almost all the measurements, except for one: the sag span. I could only find the sag ratio (1/12) but I need to convert this ratio to meters...

Homework Statement Convert the diameter to inches or to feet. Inches = 28 feet*12 inches/foot + 4 inches = 340 inches. Feet=28.333 Radius = 170 inches or 14.167 feet. Area of the bottom in square inch = 3.1416*170*170 = 90,746 sq in Area of the bottom in ft2 (square feet) = 3.1416 *...

Homework Statement The problem and its solution are attached as TheProblemAndTheSolution.jpg. If you don't want to view the attached image, the cartesian-coordinate version that the problem wants me to convert to a polar-coordinate version is the following (let "int" = "integral").: int int (1...

Homework Statement The angular velocity of the ferris wheel with a diameter of 18m is pi/24 radians/s. How would that compare to m/s? Homework Equations v=(2pi(r))/360 The Attempt at a Solution 2pi(9)/360 =0.157m/s

I'm trying to understand the issue of CO2 and global warming better. Can anyone explain to me the mechanism by which CO2 in particular converts infrared radiation to heat. I've had a semester of college chem and three semesters of physics, but I'm not sure what theory I should be able to use...

Hi, I'm trying to covert a NFA to a regular expression and I've manged to come up with an answer but I don't think that it is right. Here's the question - http://i.imgur.com/NUHxTXY.png And here's my workings -...

I have a laser cutter at work I'm trying to program. It's from the 80's and reads old school g-code, specifically .nc1 files. I use it to cut x-ray film screens. Right now we have an ancient laptop with an old converter on it that converts to .nc1. No one here knows where this converter...

As an example let's say The diameter is 28' 4" how do you convert into inches and to feet

In the above title 10 and 1000 are arbitrary numbers I will use them below to signify the concept of a smaller and larger number. I know that n points are described by at most an x^(n-1) polynomial. What I really mean to ask is: Is it possible to take a "smaller" amount of points say 10, go...

Homework Statement Question: Lake Mead is formed by the Hoover Dam, and while it actually changes in area and volume, consider it has an average area of 100,000 acres. Assume that 250 W/m^2 of sunlight falls on Lake Mead, how much electricity could be produced if this lake area was covered by...

i want to write a hypergeometric function (2F1(a,b;c,x)) as function of n that generate polynomials below n=0 → 1 n=1 → y n=2 → 4(ω+1)y^2-1 n=3 → y(2(2ω+3)y^2-3) n=4 → 8(ω+2)(2ω+3)y^4-6(6+4ω)y^2+3 ... → ... 2F1(a,b;c,x)=1+(ab)/(c)x+(a(a+1)b(b+1))/(c(c+1))x^2/2!+... the...

Homework Statement For example, a linear plot would with x and y values would just plot normally where x and y increases linearly from 0 to infinity. When we use a log graph, do we just plug in x and y to a graph in which the x and y go from 0, 10, 100, 1000, or do we convert the numbers...

What am I doing wrong? Convert $$r = 2sin\theta$$ to an equation in rectangular coordinates.. $$x^2 +y^2 = r^2$$ $$x^2 + y^2 = 2y$$ $$x^2 + y^2 - 2y = 0$$ $$x^2 + y^2 - 2y - 1 = 1$$ $$x^2 + (y-1)^2 = 1$$ Coordinates are $$(0,1)$$ yes?

I would like to convert: \frac{1}{1+x^{2m}} into a sum of terms. Preferably m terms but 2m terms would be OK. I start off with: \frac{1}{1+x^{2m}}=\frac{1}{\Pi^k_1(x-e^{i\frac{2k-1}{2m}\pi})(x-e^{-i\frac{2k-1}{2m}\pi})}=\frac{1}{\Pi^k_1 (x^2-2x \cdot cos \frac{2k-1}{2m}\pi +1)} where k = 1...

A certain laptop says it can withstand 1500 gs. Assuming that it's dropped onto a hard surface, and ignoring air resistance, how would I calculate how many times Hubby can come home late without calling the max "safe" drop height?