Recent content by kathyt.25

Homework Statement What is the flux density of salt in a horizontal tube, 10cm in length, connecting seawater (salinity 30g/L) to a tank of freshwater (salinity ~0) assuming no advection occurs? Homework Equations J (g/m2s) = C (g/m3) x V (m/s) The Attempt at a Solution C = 30g/L *...

No, it's not a chemical reaction. We're working with Basal Metabolism Rates (BMR) in physiology right now, where BMR is measured in kilocalories/day. I need to convert it to millimoles/g/h to apply it to the weight of a mouse. So I just need to know how to convert the units.

Homework Statement *Sorry, I got the prefix in the subject wrong... it's supposed to be KCal/day to mmol/g/h, not micromoles How do I convert kilocalories/day to millimoles/g/h? Homework Equations Obviously there are 24 hours in a day, but I don't know how to go from KCal to millimol/g

Are you using Principles of Human Physiology by Stanfield and Germann, by any chance? First off, in cardiovascular physiology, when they refer to pressure "drop", this means pressure CHANGE. Therefore, arterioles have the greatest pressure change, relative to the other vessels. Also, think of...

Concerning the first law of thermodynamics: dE = q - w dE: change in internal energy of a system q: heat added/removed from system w: work on/by the system What is the difference between q (heat added/removed from the system) and H (enthalpy, or heat flow)? Are they analogous to each other?

Homework Statement If the load placed in the wheel barrow weighs 20 N and is 40 cm from the wheel, what force must be applied to the handles at a distance of 120 cm in order to balance the load? Homework Equations Tau = F r Sin(theta) The Attempt at a Solution Im really just...

would I use the force of gravity as a part of the ay force? So it would be 15.4 + (force gravity) - 10.5?

Homework Statement Forces of 10.5 N north, 19.3 N east, and 15.4 N south are simultaneously applied to a 3.81 kg mass as it rests on an air table. What is the magnitude of its acceleration? Homework Equations F=ma The Attempt at a Solution Well I got the resultant force for the y...

My original question: Why do oxidation reactions from primary alcohols to aldehydyes/carboxylic acids, or secondary alcohols to ketones require an acid (positive hydrogen ion)? I can see that the reason we have an oxidizing agent is to take away two hydrogen ions from the alcohol, but why do...

Does an atom ALWAYS need to be hybridized in order for it to bond to other atoms? Why or why not? In what cases does it need to be hybridized in order to bond with other atoms?

I just have a quick question about hydrocarbon nomenclature: When picking the "parent chain", I know that you're supposed to pick the one with the longest carbon chain... does the parent chain always have to have the double/triple bonds? Or can the double/triple bonds be located in a sidechain...

Can you consider a benzene ring to also be an alkene? As in, there are double bonds within the benzene ring.

What do you mean by domains?

Yeah, I don't think I understand hybridization that well either. Can you explain why single bonds are sp3-hybridized, double bonds are sp2-hybridized, and triple bonds are sp hybridized?

Homework Statement How many sp3-hybridized carbon atoms does tamoxifen possess? This is tamoxifen: http://en.wikipedia.org/wiki/File:Tamoxifen_Structural_Formulae.png2. The attempt at a solution Are all carbons sp3-hybridized? Does the hybridization of carbon vary, depending on the bonds (ie...