Balance Definition and 461 Threads

Do plants absorb as much carbon-dioxide as they release? Is there a CO2 balance, deficit, or surplus in the plant world?

Hi guys, I'm working on a prototype for a lamp and have quickly overreached my meagre school boy mechanics skills, almost at the first hurdle, in fact. Embarrassing, I know, but hopefully some kind soul here will be able to point me in the right direction. A picture is worth a thousand words...

does anyone no of a math formula to balance uneven weights? say if i had a 100g (3.5oz) weight on a bar 100mm (3.9in) from a center point and another weight of 150g (5.5oz) how far will it need to be from the center to level the bar. could it be as simple as double the weight double the...

Homework Statement I'm doing an assignment involving a current balance, and the one thing I don't understand is the currents. I have two separate currents, one labeled "Current in Solenoid" and another labeled "Current in Loop". Now, I know the current in the loop is the part that causes...

Homework Statement Balance the equation (Note: the coefficients provided may be wrong): 3 Co(s) + 8 H+(aq) + 8 NO3-(aq) → 3 Co2+(aq) + 6 NO3-(aq) + 2 NO(g) + 4 H2O(l) The Attempt at a Solution I started out by doing a half reaction Co → Co 2+ +2e- This...

Homework Statement There are three different reactions we did in class. B-: 6C14 --> 7N14 + e- B+: 6C11 --> 5B11 + e+ Nuclear rxn: alpha particle + 7N14 --> 8O17 + e+ Homework Equations Q tot = (mass inital - mass final) * 931.5 MeV Charge balance The Attempt at a Solution In...

Here is my current situation, as a high school drop out, I can continue my education at a so called Adult Education Center. This means I can choose my schedule that best fits my needs. Here is the thing, should I do only 2 classes a day and try my best to get close to 100% in my classes, or...

A mass is winded via string aroung a flywheel and allowed to fall a specific height before detachement. The flywheel is connected to a small DC motor via gears and starts generating electricity once the mass is allowed to fall.. Now without the DC motor ( generator) the equation of energy...

Recently, I've gotten into a kind of crisis mode. I am a third year undergraduate majoring in physics. Last semester, I've overloaded myself with graduate courses and dragged through it with good marks at the end. My social life was pretty much non-existent. I slowly realized that I cannot...

Hello, what is the assumed balance between neg, pos and nuetral charge in the whole universe? Does it balance out to nuetral? Ta Chris

Homework Statement A fan loses an 11 gram piece 460mm from the shaft center. It rotates at 1000 RPM and cannot operate if the shaft is out of balance by more than 8%. Prove whether or not the fan can still operate. Homework Equations Fc = mwr2 The Attempt at a Solution I have...

Well I have the answer already, just don't understand it. A rectangular coil of wire is hung from one arm of a balance, as my beautiful diagram will show. With the magnetic turned off, a Mass M is added to the pan on the other arm to balance the weight of the coil. When a constant magnetic...

What's the purpose of "thrust balance" in Turbo Fan Engine? I'd like to know about the purpose of the Thrust balance system in commercial Turbo Fan Engine. Can you tell me the major role of thrust balance system? Also, the relations between thrust balance system and compressor / main bearing...

Help! I've spent 2 days now trying to do this now and it driving me mad. http://www.emvino.com/pivot.jpg Given the following diagram, what distance from the pivot (x) is required to balance the beam? any help would be highly appreciated. Thanks

Ca_3(PO_4)_2 + H_3PO_4 -> Ca(H_2PO_4)_2 i got the same problem with this one MgO + H_3PO_4 -> Mg_3(PO_4)_2 + H_2O each time i balance one element i get the other which i balance before to be dis balanced what is the general way of solving such things ??

The senses are, in a nutshell, methods by which we gather information about the outside world. I've never understood why balance is not considered a sixth sense. It is a way that we gather information about the outside world that is unique from the other senses. It tells us which way is down...

A hydraulic balance used to detect small changes in mass is shown in Fig. 9.31. If a mass m of 0.40 g is placed on the balance platform, by how much will the height of the water in the smaller, 1.0 cm diameter cylinder have changed when the balance comes to equilibrium? please give a detailed...

Homework Statement 1. If the Sun’s power is reduced by 10%, what would the temperature of the Earth be? Assume an albedo of 0.3 and do not consider greenhouse effects. Homework Equations There is an equation here in the book but it makes no sense to me The Attempt at a Solution...

This is just a problem from my midterm, and I was wondering if I did it correctly Homework Statement Weight of block B is 15kN, weight of block A is 25kN. Find force P that has to be applied to keep the system in equilibrium in tension in the cable Homework Equations \sumFx=0...

Three boys are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a pivot at the center, and a very light board L = 3.52 m long, see figure below. Two boys are already on either end. One has a mass of m1 = 53.0 kg, and the other a mass of m2 = 32.8 kg. How far from the...

My main question in order to solve this problem is...should kinetic energy be neglected? Ok, so here's the problem question: Sea water with a density of rho = 1025 (kg/m^3) flows through a pump of 0.21 (m^3/s). The pump inlet is 0.25 (m) in diameter. At the inlet the pressure is -0.15 (m of...

Hello everybody.. I have aquestion and hope to get help..please bear with me and try to finish reading my question.. Thank u very much for your time. My question is I have a pilot plant filter.. and i need to add some chemicals to the raw water before entering the filter..say for...

You are given 12 coins that are identical except that they are numbered and you are told that one coin is odd-weighted, being either slightly lighter or slightly heavier than anyone of the remaining eleven. You are given a worktable and a balance beam scale. You may use the scale three times...

I have constructed a wind tunnel with approximately 15 x 15 in. cross-sectional area test section. Where can i get some ideas/plans to build a simple force balance that can measure lift and drag forces simultaneously? Currently I'm using a single-axis button load-cell setup to measure...

How many "C" does it take to balance one "A"? A A A A A B B B B A C C ------------- ------------ -------- --------- l l...

What the heck? The minimum monthly payment for a credit card is the larger of $5 or 1/25 of the outstanding balance. If the balance is less than $5, then the entire balance is due. If you make only the minimum payment each month, how long will it take to pay off a balance of $200? Clearly...

i saw a hindi movie that had an end scene with a bus with a few passengers involved in a mishap and end up hanging out of a cliff. the hero tells everyone to move the frnt slowly ... which made sense - in the end there is an old couple at the back and the ladys frozen with fear. so he asks...

When people are balancing themselves on a surface where their feet do not provide a lot of balance (sidestepping a ledge of rope) they tend to wobble or swing their arms to maintain/regain balance. My question is, how does that work? When a person wobbles they move their hips outward and their...

Why is it easier to balance on a bicycle when you are cycling faster rather than slow? Does it have something to do with angular momentum? Thanks.

I brought an old analytical balance into my kid's elementary school for "Science Day", and I explained the difference in using a scale (measures weight) and the balance (measures mass). I told them that although objects on a scale will weigh different amounts depending on if they are weighed...

My daughter has been asked to balance this chemical equation by her 7th grade Nun. Can anyone tell me if it can be done and how? Thanks H2O2 - H2+H2O

if i have the equation for enthalpy of water overall enthalpy = enthalpy of formation + enthalpy of water 1800k - enthalpy of water at 298k what is the value of enthalpy of formation is it enthalpy of formation of water as gas or liquid? enthaply at 1800k would that be enthalpy of...

<a href="http://www.flickr.com/photos/just-karl/2407404197/" title="IMG_8600 by Karl W., on Flickr"><img src="http://farm3.static.flickr.com/2206/2407404197_18ab7a3497.jpg" width="500" height="317" alt="IMG_8600" /></a> I have to find at what the angle of the string is using the torque...

ok so i am completely lost on all this force stuff...help...please An object is hung from a spring balance attached to the ceiling of an elevator cab. The balance reads 65 N when the elevator is standing still. (a) What is the reading when the elevator is moving upward with a constant...

Homework Statement 24. A person tries to balance vertically each of three long uniform cylinders with equal radii on the end of his finger: * A wood cylinder of mass m and length L with moment of inertia I * A bamboo cylinder of mass m and length 3L with moment of inertia 9I...

Alright guys here it is: My teacher asked us to think about a bonus question. He wants us to use torque to find the mass of the sliding mass on the center beam balance (the one that moves through 0,100,200...ect.) How do i do this?!

Hi, Could anyone please help me with this question: A man with mass of 80 kg wants to balance a 40 kg boy who is standing at the end of the board. If the board is uniform and has a mass of 20 kg how far from the middle in meters, x, must the man stand so that he and the boy balance each...

Is this possible? http://bp1.blogger.com/_cxmptAPYR-s/RdeCowgR2iI/AAAAAAAAARk/cqmc7VWv60M/s1600-h/hammerrulerpuzzle_1.jpg

As some of you may know from my previous post, I'm trying to transfer from a bottom-tier school to something more challenging next fall. After some time with my advisor, I've been left with a somewhat difficult decision. My dream program is EE at UIUC. However, out of state tuition runs...

hi all! is there anybody who can help me with shell balance? one of my main questions is wat are the main assumptions wen we apply shell balance... moreover.. can anybody suggest a gud book or site/tutorial wer i can get a hang of shell balance properly? thank you!

if anybody can help, the problem is finding out the amount of time it takes to drain a 12oz soda can through the shotgun method. this method of draining involves opening the tab on top of the can and then punching a hole at the bottom to drain the soda out.the velocity out obviously changes as...

Homework Statement A 43kg sign hangs by a thin wire slightly off center on a 2.2m long, thin rod. Each end of the rod is supported by a thin wire. the mass of the rod is 18.3kg 1. Determine the tension in each of the 2 wires that support the rod. 2. How far off-center is the wire...

Homework Statement Find the readings on each of the balances in these 4 situations (strings are massless and incline is frictionless): (sorry about the photo - don't know how to fix it) Homework Equations F=ma, W=mg The Attempt at a Solution 1) Seems easy enough. I am...

Hello everyone! So I'm working on constructing a simple mass balance for a cake. I didn't have any problems doing that, but I was asked about waste that is generated in the process of making the cake. Is there really a waste generated in this kind of process? I've also been asked to...

Why does the amount of antimatter equal the amount of matter in the universe. If they go in pairs and are opposites one must exist for the other to exist. Why is matter more abundant in our universe and what has happened to the antimatter?

Homework Statement Define a dimensionless radial coordinate as x\,=\,r\,\sqrt{\frac{2\,h}{b\,k}} and introduce y\,=\,T\,-\,T_a, and thus show the elementary equation x^2\,\frac{d^2y}{dx}\,+\,x\,\frac{dy}{dx}\,-\,x^2\,y\,=\,0 describes the physical situation. It gives the "physical...

I want to derive equation of continuity in spherical coordiantes based on shell balance,can anybody tell me where the hell this sin(theta) comes from? i don't want to transform from cartesian,

Homework Statement 1. Motor/generator. In the bar and rail problem shown in Figure 1, the bar moves at a constant velocity of 6 m/s to the right. There is uniform magnetic field of 0.75 T oriented downward, as shown, in the space between the rails. The mass of the bar is 500 g, and the...

Homework Statement In the figure (see attatched), an electron accelerated from rest through potential difference 2.0 kV enters the gap between two parallel plates having separation 20.0 mm and potential difference 130 V. The lower plate is at the lower potential. Neglect fringing and assume...

Homework Statement There are two current carrying wires carrying the same current but in opposite directions. One wire is rigidly fixed whereas the other is part of a frame that can rotate about a horizontal axis. When current begins to flow in the two wires, they repel each other. The upper...