Homework Help

An reaction follows michaelis menten enzyme kinetics. Km=.001 M, and the initial concentration of substrate=0.840993 M. After 2 seconds, 5% of the substrate has been converted to product. How much CO2 will be converted after 10, 30, and 60 seconds? I know the answer is 25% after 10 seconds, 75% after 30 seconds, and 100% after 50 seconds, but I don't know how to get these numbers using the m-m equations: v=d[P]/dt=Vmax*/ +Km Just looking at the answers, it seems like the reaction rate just stays the same, and 5% is converted for each 2 seconds the reaction goes. However, I feel like this a huge simplification...what was the point of including Km and the initial s…

So we just started a unit on motion. The question is: Calculate the mass of an object if it accelerated at 3.5m/s squared under the influence of a net force of 70N. Is the way to work this out just m= w/g? I got 20kg.

Hi, I came across a question where it said adding sugar to water will decrease the temperature of the water and I have to explain why. I understand that it is due to the bonding with the water and sugar and my reason for that is this: -When sugar formed a bond with water, the bonding releases energy in the form of heat. Therefore, the temperature of the water decreases for the heat is transferred to the surroundings. But it appears that I am wrong, for I searched google and it appears that surrounding is part of the "temperature" of the water. Does that mean that the answer to the question is: -When the heat broke the bonds between water and hydrogen at…

Hi, I am doing a project on a mixture of Aluminum and Ammonium Nitrate. When you mix these together it makes an explosive, which will only go off when you shoot it with a rifle. I have a few questions regarding what happens between the two. 1. What makes the aluminum a catalyst 2. Is the ammonium nitrate detonating? 3. From what I've read, the aluminum acts as a catalyst and makes a lower energy pathway for detonation. The aluminum makes the the ammonium nitrate unstable. Is this correct? 4. Does the aluminum make a small detonation when under high pressure or is impacted very hard? If this is totally wrong feel free to tell me what is going on in the mi…

Clonally selection and expansion work much the same way in B cells as in T cells. Only B cells with appropriate antigen specificity are selected for and expanded. Eventually, the plasma cells secrete antibodies with antigenic specificity identical to those that were on the surfaces of the selected B cells. Notice in the figure that both plasma cells and memory B cells are generated simultaneously. This flow chart shows how the clonally selection of B cells BIO X4 takes place. The left panel shows the primary response and the right panel shows the secondary response. During a primary B cell immune response, both antibody-secreting plasma cells and memory B cells are prod…

How can the definition of an acid be "something that donates protons" when protons don't move. Also, why does having an extra hydrogen atom make an acid an acid and vice versa with hydroxide and bases. Finally, what does it mean when an acid increases the H+ concentration in a solution? Thanks in Advance!

Look just at position 1. We have work done from left to right p1A1d1, and work done from right to left p2A2d2. What will happen if pressure p2 is higher than pressure p1, but A1d1 is bigger than A2d2, and lets say they result with a net work = 0

Block A weighs 100 lb. The coefficient of kinetic friction between Block A and the inclined surface (θ = 35°) is 0.15. What is the weight of Block B such that when the system is released from rest, Block A accelerates 5 ft/s2down the incline? What is the tension in the cable?

Block A starts from rest and then starts moving up with a constant velocity of -4 m/s. At the same time, Block Bis moving down with velocity vB = 2 m/s and has acceleration defined by aB = -vB. At t = 3 s, what is the velocity (including direction) of Block C? How much (and in what direction) has Block C moved?I'm really clueless about this problem

Hello! I'm new to this forum and I need help understanding a homework problem that I have; You have just purified a peptide that might stimulate nerve cells to grow in culture. You decide to isolate the peptide and determine its amino acid sequence: H2N-trp-ala-lys-ser-thr-ser-met-cys-COOH Why is methionine not the first amino acid in the peptide?

Hello! I'm Izzy! I'm new to this forum so hello from here!!! I need some help in Quantum Mechanics. I'm struggling to understand the differences and setting of electron shells. What exactly is the difference between Shells, Sub-shells and Orbitals? I know Sub-shells make up a whole shell but where do the orbitals come in? Please help....

a) Use the Heisenberg uncertainty principle to calculate Δx for an electron with Δv = 0.670 m/s. b) By what factor is the uncertainty of the (above) electron's position larger than the diameter of the hydrogen atom? (Assume the diameter of the hydrogen atom is 1.00×10-8 cm.) c) Use the Heisenberg uncertainty principle to calculate Δx for a ball (mass = 152 g, diameter = 8.75 cm) with Δv = 0.670 m/s. d) The uncertainty of the (above) ball's position is equal to what factor times the diameter of the ball?

How do I factorize? [MATH]-1-p^2q^2[/MATH] I would have used the idea of difference of two squares to handle this but I found it difficult because of the negative sign. If I factor the -1, I have [MATH]-1(1+p^2q^2)[/MATH] or [MATH]-1(p^2q^2+1)[/MATH] and that makes the terms inside the bracket unfactorizable?

I need your advise on whether using blogs from a commercial writing service is ethical

How do i work out this question? The power station generates 100MW of power at a voltage of 25kV. Transformer A, which links the power station to the transmission cables, has 44 000 turn in its 275kV secondary coil. Calculate the number of turns in the primary coil of transformer A.

Hi everyone. is there anyone that knows if, when I have a subset of a population, I can I standardize the subset?? what I mean is, If I have a unknown number of eggs, I take 30 of that eggs and after I have to use what I know (data obtained from the subgroup) for that 30 eggs on all other eggs, although I do not know how many are the total eggs. How can I do it on R program??? I hope I clearly exposed my question. thank you

Tclear line between when to stimulate mental functions of an adult to delay the moment when mental capacity will be those of an old man and prevent him from becoming a senile person? In all cases, it is desired to maintain a potential Brain Pills or to recover what was lost.As our brain starts to become a bit slower since the twenties, when should we start to stimulate? Why we would look after us only seriously ill people and not of those who are a little less fit? Why would it be wrong to take care of his brain, while we have everything else like maniacs http://thedropnet.com/brain-pills/

Hi If anyone can help me answer the following questions below, it would be a great help. Its about bioreactors, turbulence 1. Why does the power requirement for a bioreactor increase when flooding ( when the cavities in the bioreactor hae merge together and beome large) occurs to the bioreactor? Shouldn't it have a lower power requirement since the agitators are practically spinning air and air much is less dense than liquid. 2. Why is tip speed of the agitator related to having the highest shear force in a bioreactor?

Hello I am curently second year of Molecular biology and i have got this question to answer. I would appreciate if someone could tell me , the very basics of it. Thank you

I have in my textbook a formula for calculating speed of action potential in myelinated axons which is V=k*d where the k is myelination constant and d is diameter of axon. But there is nothing said about non-myelinated axons. I think i read something somewhere about V=square(k)*d but i am not sure. If you know something more write . Thank you!

Hello everyone,I am a new user of the forum. I hope with the supportive people out there I can get help with my studies and if possible help others too. To start with I have a question related to heat transfer through a wall. The question requires us to find the position x, using the expression of temperature T(x) in a semi-infinite wall for which the value of -Kdt/dx (it's delta in the question but unable to insert a symbol I replaced with d) is equal to given values of heat flux ( for eg; 3.4 W/m2). I searched for an aid throughout but only found really complicated ones. My guess is that I need to first find an algebric expression of temperature T(x) for a semi-in…

I need to find the free charge per unit length, λ, on a cylinder which is surrounded by a LIH dielectric material (which itself is encased by another tube). I've already found the electrostatic potential V® from which i've found E. From this i can find D easily as D= εε0E. Then i use this integral version of Gauss's law: [math]\int_S[/math] D.dS=Qf. Using the cylindrical symmetry of the situation i get: Dr2πrL = Qf Then i just plug in my values and get an answer. The question is what am i missing? The question is worth a barrel of marks and the above seems too simple. I've deliberately omitted details as i just want a nudge in the right direction,…

Hello, I have a question about buoyancy of concrete in water. If a submersible pump station is placed under water, and it has under it a concrete foundation to hold it in equilibrium. How can someone calculate the minimum weight of the concrete foundation? The pump station has a diameter: 1.6 meter density of the water is: 1000 kg/m^3 Density of the concrete is: 2300 kg/m^3 the height of the submersed item is 2 meter under water How thick must the concrete foundation be to counterbalance the buoyancy forces? PS: please show me equations, and not just an explanation

Okay so in my AP Bio class we're presenting different genetic disorders and I chose color blindness. I thought it would be a cool idea to dissect an eyeball and take pictures of the retina under a microscope. It took a while to pry out the retina because it's so thin and delicate but I finally got it out and onto a slide. I was wondering if anyone could please tell me what exactly I found in the picture. I would greatly appreciate it if anyone knew the proper anatomy so that I could label it more efficiently. It's a sheep eyeball by the way if it makes any difference.

there is a lamppost which is 40 m high.5 m infront of the post there is a metal plate which is 8 m long. which angle of the plate with the verticle line will give the longest shadow?