Recent content by jacksonpeeble

Empirical Formula from Stoichiometry!? Homework Statement More than 1 billion pounds of adipic acid (MW 146.1 g/mol) is manufactured in the US each year. Most of it is used to make synthetic fabrics. Adipic acid contains only C, H, and O. Combustion of a 1.6380g sample of adipic acid gives...

Oxidation occurs most easily at points of stress in a metal. This point becomes an anode for the reaction of Iron with Oxygen, yielding the half-reaction of Fe→Fe2++2e-. The reduction half-reaction, therefore, is O2+2H2O+4e-→4OH-. There are some nice illustrations of this on pages 816-817...

Homework Statement How many grams of solid calcium hydroxide are needed to react with 14.2 mL of a 1.62 M nitric acid solution? Assume that the volume remains constant when the calcium hydroxide is added. Ca(OH)2 + 2 HNO3 Ca(NO3)2 + 2 H2O Homework Equations Molarity=moles of...

Homework Statement As our final project, we have been instructed to design a goblet (which will actually be physically prototyped using a 3-D printer) according to the following specifications: 1. The goblet must hold exactly 200 cc. 2. The goblet must be symmetric (a solid of revolution)...

Homework Statement Explain what happens when two polarizers are oriented perpendicular to one another. Homework Equations (None Known) The Attempt at a Solution Well... I would imagine that absolutely no light would get through because all of it would be blocked. The question is...

Any input? If all is correct (which I'm not entirely sure of), I'd appreciate verification, too!

Homework Statement A 4kg object is fired with a horizontal velocity of 8 m/s from a cliff 122.5 meters high. a) How long does it take the projectile to hit the ground? b) How far from the base of the cliff does it land? c) What is its speed right before hitting the ground? d) What is the...

Thanks for the reply! I really appreciate your quick response! :smile: That is one of the main formulas that we use. I managed to solve the problem by taking the focal length over the distance Earth to sun and then multiplying that by the diameter of the sun. (.108/ 1.5E-11) * 1.39E9= h...

Homework Statement A camper is trying to start a fire by focusing sunlight onto a piece of paper. The diameter of the sun is 1.39e9 m, and its mean distance from the Earth is 1.50e11 m. The camper is using a converging lens whose focal length is 10.8 cm. (a) What is the area of the sun's...

I didn't notice any fundamental problems with your calculation besides the previously-mentioned error in your percentage, which you must have fixed anyhow. A year is almost exactly 365 days, 5 hours, 48 minutes and 46 seconds (don't worry - I didn't have that memorized, I had to look it up)...

The capacitance increases by a factor of 2, because 2*2/2=2. I feel stupid. :wink: Thanks for the help.

Is it e*Area/distance?

If the length and width of each plate of a parallel plate capacitor were doubled, and the spacing between the plates was also doubled, by what factor does the capacitance change? I know that increasing the length and width of a plate increases its capacitance, and I thought that it was...

Nevermind, e=1.6*10^-19, so the final answer is 7.36*10^13. Sorry for the premature post!

Homework Statement A capacitor has a capacitance of 2.56 10-8 F. In the charging process, electrons are removed from one plate and placed on the other plate. When the potential difference between the plates is 460 V, how many electrons have been transferred? Homework Equations q=CV...