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    Fe-N bond!

    Wow thanks you are a research genius! Anton
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    Fe-N bond!

    I've been searching far and wide and simply cannot find any info on the BOND ENERGY of a Fe- N coordinate-covalent bond, like that found in the heme group of haemoglobin. it looks like this: ....... N ....... | N -- Fe2+ -- N ....... | ....... N...
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    Haemoglobin properties.

    hello everyone. I was wondering if anyone knew a site that would tell me the properties of haemoglobin such as its boiling point, melting point, etc.. I can't seem to find any. I am doing a project on the "heme group" and I need to find properties such as weight, bp, ml, etc for heme group...
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    Nitrogen Valences?

    Just to add, the purpose of this question is to understand the shape of the heme group molecule using bonding theory...I have to write about all th ebond angles and such...whew...so I guess I need to understand any resonant structures and lone pairs, etc...
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    Nitrogen Valences?

    Hey everyone I am confused as to the structure of a heme molecule. A picture of it is shown here: http://en.wikipedia.org/wiki/Image:Heme.png I understand the heme group is largely a porphyrin molecule. The 4 Nitrogens are coordinate-covalently bound to the central Iron atom. The...
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    Ballistic Pendulum!

    Hi all We are doing a physics lab where we lift a pendulum to a certain height, let go of it, and the pendulum strikes a physics cart on a track. A lightgate then measures the velocity of the cart. We need to figure out the speed of the cart given the distance the pendulum is raised by...
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    Intersecting planes

    Scott: This is pretty easy! The only thing u do is make sure both bormal vectors are not scalar multiples of eachother..... in other words if P1 = Ax+By+Cz+D and P2 = Wx + Xy +Yz +Z then to intesect in a line..... [A,B,C] canot equal k[W,X,Y] k is any num Anton
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    Combination Lock

    I'm sorry....I don't quite understand this phrasing...could you repeat it please. Ok I know the first number in the combination can be any of the numbers 0-59. Then the second number in the combination can also be any of the 60 digits. However, the 3rd number needs to differ by at laest 3...
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    Combination Lock

    Hey everyone I have this for Discrete homework: A lock has the numbers from 0 to 59 .......A combo is made up of 3 numbers.......How many combos are possible if the 2nd and 3rd numbers have to differ by at least 3 The answer is whatever 60 times 58 times 57 is I know why the 60 is...
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    Motor and Battery!

    Hey everyone, I built a motor for my physics exam....and it works extremely well....it spins extremely fast and there are sparks galore on the commutator. I have it attached to a 6V lantern battery (the ones a bit bigger than your fist). How long can I expect the battery to keep...
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    Ohm's law

    When plotting potential difference VS current (volts VS amps).....how does one explain the intercept at (0,0) ? Is it because without potential difference you can't have current and vice versa? Is that true all the time? Thanks
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    Resistor Tolerance/Error

    Hey everyone. I am doing an Ohm's law lab where there is a variable source, a fixed resistor, a voltmeter across the resistor, and an ammeter in series with the resistor. The fixed resistor is an unknown value but has a tolerance of 5% You need to figure out its value by plotting...
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    Work Problem (easy but weird)

    That's what I wanna know too,,I still dont get it
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    Work Problem (easy but weird)

    It's to 2 significant digits (rounding) Oh boy I still dont know how to solve this problem :confused:
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    Work Problem (easy but weird)

    Right. It says that at 20m, it is travelling at 15 m/s
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    Work Problem (easy but weird)

    Oups yeah I meant 1.5e2 ....so Ek = 1/2 x m x v^2 I know the mass, but not the initial velocity!
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    Work Problem (easy but weird)

    But....to know accel, wouldnt you need the initial velocity which we dont know? I still dont understand :redface:
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    Work Problem (easy but weird)

    My book says 1.5e2 J...I guess thats to 2 significant digits...but can anyone explain to me why the 15 m/s became a 15 m/s/s?
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    Work Problem (easy but weird)

    Yes! The answer is 150 J! However, Force=mass x accel You said that the accel is 15 m/s/s.....why?? Isnt that the speed? Why is the speed and accel the same?
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    Work Problem (easy but weird)

    This seems easy but I'm not getting the right answer! The question: A 0.5 kg ball is thrown into the air. At a height of 20m above the ground, it is travelling at 15 m/s. a)How much work was done by someone at ground level throwing the ball up into the air Ok, for a), Work=Force x...
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    MagLev model?

    I am doing a project for my physics course....I have to design a device that uses electromagnetism. I'm thinking of doing something "different" rather than the boring bells/radios etc.. Would a small-scale model of a maglev train be feasible in everyone's opinion? I am planning to build...
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    Diagonal Frog

    I love Kai Krause's quote "A good analogy is like a diagonal frog"....to me it's one of those oxymorons...like "astronomically small" or "authentic replica" Is that why it's so popular...because it's a clever oxymoron...or did this guy Kai Krause have another intent for the quote that I...
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    Population problem

    Yeah....but how can one integrate a random period of 20 years with no dates given and the year 2000...that's what gets me confused.....we dont know the dates when the 20-year period takes place
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    Population problem

    Well, yeah but I can't figure out the method of solution....which two fomulas to create to determine k
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    Population problem

    I still can't figure it out...all these years and variables are confusing Is 49030 = 51003e^k(t+20) right as a first formula? I'm really confused :tongue2:
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    Population problem

    -------------------------------------------------------------------------------- Hi everyone I'm having trouble with this problem, while preparing for my calculus test this Monday....could anyone help me figure out the solution....I know that I must use the formula P=P(original)e^kt...
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    Story time

    OR we could actually continue the story instead of complaining :confused:
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    Story time

    ...a shape-shifting machine to be able to morph into the cat, that so often visited Valerie. With it, she could..
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    Fascinating Time-Travel Paradox

    I meant looking through a time machine window and seeing what you will be doing tomorrow. When tomorrow comes though, you decide to do something different. Anton
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    Fascinating Time-Travel Paradox

    Not only that, but even if you went back in time and moved a single MOLECULE of air, and then went back to your regular time, you would change the future immensely. I believe that the "moved" molecule of air, would at first produce no significant change in the time-line, but eventually it...
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