Homework Help

The singles portion of a tennis court is 27.0 ft wide and 78.0 ft long. a. If a serve is measured at 185 km/h, how many seconds does it take for the tennis ball to travel the length of the court? (length of the court in meters is 23.8 meters.) b. How many liters of paint are needed to paint the court if 1 gal of paint covers 150ft^2? ------------------------- Serving size 0.50 oz (6 crackers) Fat 4 g per serving, Sodium 140 mg per serving a. If a box has a net weight (contents only) of 8.0 oz, about how many crackers are in the box? b. If you ate 10 crackers, how many ounches of fat are you consuming?? ----------------- I just need to know how …

I am working on Taylor Series and I believe one of the derivatives in the solution manual is wrong. I am taking the derivative of [math] f(x) = \frac{x}{(1-x^2)^{(3/2)}} [/math] I believe it is: [math] f'(x) = \frac{1+2x^2}{(1-x^2)^2} [/math] but the answer key says it is: [math] f'(x) = \frac{1+2x^2}{(1-x^2)^{5/2}} [/math] Can you check my math please.

I was given the following problem description for a depth-determination problem, however I am completly unable to figure out how this "pseudo-distance" feature works, if anyone has any clues and can provide a uber-simple example it would be much appreciated - I just can't see how it works/applies. [Problem] In the depth-determination problem, we maintain a forest F = {Ti} of rooted trees. We use the disjoint-set forest S=Si, where each set Si (which is itself a tree) corresponds to a tree Ti in the forest F. The tree structure within a set Si, however, does not necessarily correspond to that of Ti. In fact, the implementation of Si does not record the exact parent…

Does anyone know of any kind of simple way to make a sort of ice sampler? I have to make one that collects ice, and I'm not quite sure where to begin. If anyone has any ideas, I would be eternally grateful!! Thanks!!! Theresa

Why do people drive worms out of the ground with electricity? i'm stumped!

i dont have my periodic table

I have a 5uM Concentration of primer stock. I need to find out how many nanograms/Microliter i have in this stock soltion. Any help appreciated! thanks

For the first time in AP Bio, I have hit a massive road block that I just cannot step over. We are up to Genetics (chapter 14 in Campbell/Reece) and I do not get it one bit. I cannot do probability for the life of me, and I am just stressing so much. The textbook didn't teach me anything, along with my teacher who gives bad lectures. Are there any online resources that greatly outline the basics of Genetics (just Mendel and the gene idea). I would love a bunch of visuals that show all the crosses and everything. Thank you so much.

How do I show that [math] a_n = \left( 1 +\frac{1}{n} \right)^{n} = e [/math]

How do I go about finding all the solutions to [math]x^4-8x^2+17=0[/math]?

I thought it might be avian bird flu since it's written that it's a fairly recent pathogen and is also prevalent in Thailand. However, the neurodegenerative symptoms don't match up. Could anyone help me make a diagnosis?

Alrighty, I was doing my homework and I ran across this problem that I can't figure out, just cyber slap me if this is a really dumb question. It takes 585 J of energy to raise the temperature of 125.6 g of mercury from 20.0*C to 55.1*C. Calculate the specific heat capacity and the molar heat capacity of mercury. :confused:

500 millilitres of acetic acid is in solution and is then diluted yielding a 5 percent solution. What is the volume of said solution. (Note Concentration of acetic acid is 17.4 mol/l). V1C1 = C2V2 500ml x 17.4 mol/l = 0.05 g/ml x V2 This is what I have for an equation but I think I took a step in the wrong direction. Help?

After the copper is formed, there is a precipitate left over i think this is Al(OH)3 but i can't explain why any help? also, why does it release hydrogen gas?

I am working in infinite sequences and I forgot something simple. What the rules for taking the derivative for a function such as this: [math] \left(\frac{3}{2} \right)^{x} [/math]

I am trying to figure out what determines which nitrogen bases form pairs in DNA?

I know Gamma ray has more energy, but I'm not sure why. Can someone explain it to me? I need to know this for a test on Tuesday.

hey, I'm doing a project on dry cell batteries. I understand that there are formulas and what-not, but how does it produce electricity??? ...same question for the Gratzel cell. and if you have any sites that may aid my project, dont hesitate to share it

I just can't find this reaction... My teacher said that the stochiometry of this reaction is 1 Na2B4O7 . 10H2O + 1 HCl. We did titration of HCl with borax... but I wonder the products. Could you help me?

A bucket of water is swung in a vertical circle. Explain qualitatively why the water in the bucket does not fall out. My model answer then explained that If the speed of the rotation is high enough, the weight of the water alone in the bucket is not enough to provide for the centripetal force required. A force will be exerted by the bottom of the bucket on the water for the water in the bucket to continue to move in a circle. By Newton's third Law, the water pushes against the bottom of the bucket and thus stays in the bucket. What does the bold text really mean? So what happens if the weight of teh water alone in the bucket is just enough? And if my speed …

Is Computer science science? Can anyone give me a direction on how to tackle this qns??

I can see with no eyes, i can hear with no ears, i can smell with no nose, i can feel with no nerves, what am i?

ok im doing this question and i am totally lost. once again got the Q&A but no working out so i cant follow the steps to HOW they got the answer. So here it is Ammonia is produced in the Harber Process under conditions of high pressure and moderate temperture. If 13.05L of an equilibrium mix at 550'C (823K) and 200kPa presurre consists of 3.00 L of nitrogen and 9.00L of hydrogen and 1.50L of ammonia calculate teh density of (g) mixture.. im not sure where to start or what formulas to use.

hello everyone i need help on a question, i have part of it done adn its correct but to get the rest it not working, this is what i have so far Propane is the major LPG constiturnt, assuming that a 17.60g sample is all propane calculate A) number of propane molecules B) number of carbon atoms C)number of hydrogen atoms propane= C3H8 A) M(c3h8)=44.09gmol-1 n=m/M = 17.09/44.09 =0.40 moles of propane n=N/6.02x10(23) N=0.40x 6.02x10(23) = 2.408x 10(23) B) n©=N/6.02x10(23) = 12.01x 6.02x10(23) = 7.23x10(24) .. the answer says 7.22x10(23) which im not sure what i am doing wrong and i can not get the c…

So I'm really confused about what the side products would be if you dehydrate 2-methyl-2-butanol by using sulfuric acid as a catalyst. I know that there will be 2 products: 2-methyl-2-butene (major) and 2-methyl-1-butene (minor). But what about side products? I don't know how to determine which side reactions are possible. Any help would be appreciated! Thanks in advance.