# Posts by richard

Total # Posts: 301

**Math**

The width of a rectangle is fixed at 16 cm. What lengths will make the perimeter greater than 78cm? Would the answer be 23 because 16*2+23*2=78cm or would the answer be 24. Because the perimeter is greater than 78cm

**Math**

thank you

**Math**

Media service charges $20 for a phone and $30/month for its economy plan. The equation c=30t +20 describes the total cost,c, of operating Media Services phone for t months. A) The total cost for 8 months of service is? My answer $260 If a customer has only $90 available, how ...

**Math**

Thank you for the help.

**Math**

Trains A & B are traveling in the same direction on parallel tracks. Train A is going 60mph and Train B at 80mph. Train A passes a station at 6:25 am. If Train b passes the same station at 6:37, what time will B catch up with A? The answer I received is: 7:03am, is that correct?

**Business Law**

Express versus Implied Contracts. Suppose that a local businessperson, McDougal, is a good friend of Krunch, the owner of a local candy store. Every day on his lunch hour McDougal goes into Krunch¡¦s candy store and spends about five minutes looking at the candy. ...

**chemistry correction**

1. Which two elements react vigorously with each other? A: Chlorine and lithium B:Chlorine and potassium C:iodine and lithium D:iodine and potassium my answer is B 2. which statement about electronegativty is correct. A: Electronegativity decrease across a period. B:...

**Math**

The exhibit hall at the fair is dividid into three sections. Tow-fifths of the exhibits are in section B of the hall, and another two-fifths ain in section C. What fraction of the exhibits are in located in section A? We have multiple choice answers. Thank you

**chemistry**

1.Use the Vsepr theory to predict and explain the shape and bond angle of each of the molecules SCI2 and C2CL2. 2.Deduce whether or not each molecule is polar, giving a reason for your answer...Any help please??

**chemistry**

.predict and expalain the order of melting point for propanol, butane, and proanone with refernce to their intermolecular forces.

**chemistry**

1.predict and expalain the order of melting point for propanol, butane, and proanone with refernce to their intermolecular forces. 2. The element sodium, aluminum, silicon, phosphrous, and sulfur are in periods 3 of the periodic table. Decribes the metallic bonding present in ...

**COM/155**

Assume you essay was written for an audience of a Midwest city's newspaper readers. What will you include in your introduction? What tone will you use? You can use your essay topic to answer these questions, as your answers will help you write your introduction. Remember, ...

**algebra**

no

**chemistry**

What will be the mass in grams of hydrogen atoms (only) that will be present in 22.2 g of compound A (XH3)?

**Math**

dx can't be zero

**chemistry**

Magnesium reacts with HCl(aq) to form MgCl2 and H2(g) ____ Mg(s) + ____ HCl(aq) -----> ____ MgCl2(aq) + ____ H2(g) The following data was collected for the above reaction: Mg (g) 5% (m/v) HCl (ml) H2 gas produced (ml) 0.50 10 167 0.50 20 333 0.50 30 500 0.50 40 500 0.50 50 ...

**chemistry**

The actual chemistry question was, given that there are 4.19 g of C6H6 how many moles do you have and this is how I solved it and it was wrong. 4.19g/78g/mole = .054 moles of C6H6

**chemistry**

How many moles are in 13grams of C6H6. should this question be broken down into its imperical formula (CH)6 and calculate the number of moles of CH and multiply by 6 or calculate the gram molecular wt of C6H6 and divide it into 13 grams? I took 13 grams and divided it by the ...

**math**

Sorry, a 100-gon is a 100 sided polygon.

**math**

a lot of times teachers will throw in a unit that has no meaning. They do this to get used to the idea of always carrying your units out with the problem. I suspect that is what is happening with your problem as I have never heard of a gon.

**chemistry**

How many moles are in 13grams of C6H6. should this question be broken down into its imperical formula (CH)6 and calculate the number of moles of CH and multiply by 6 or calculate the gram molecular wt of C6H6 and divide it into 13 grams?

**Trigonometry**

take the tangent of 70 degrees and multiply it by 30 yards.

**physics.**

: When the mass hits the pile, it has kinetic energy. This energy is transformed into other forms of energy as the speed of the falling mass rapidly reduces to zero. As this happens, the pile is forced a small distance into the ground. question: Explain how a large force is ...

**history**

What were the main elements of Johnson’s War on Poverty?

**history**

What were the main elements of Johnson’s War on Poverty?

**Calculus**

Would someone please tell me how to solve these two problems? Find the indefinite integral: x(x-1)^5 dx (v^2)(1-v)^6 dv

**science**

what is air? a compound, a mixture, a solution, or an amalgam

**chemistry.**

What amount of H2(g) is produced when 12g of magnesium reacts completely with dilute HCl(aq) Mg(s) + 2HCl(aq) ------> MgCl2(aq) + H2(g)

**chemistry.**

What?

**chemistry.**

Lithium hydroxide reacts with carbon dioxide as follow. 2LiOH + CO2________ Li2CO3 + H2O What mass (in grams) of Lithium hydroxide is need to react with 11 g of carbon dioxide?

**Physics**

Thank you, I really appreciate that help. We haven't done derivatives yet and its hard to see without that knowledge...

**Physics**

A 0.150 kg particle moves along an x axis according to x(t) = -13.00 + 2.00t + 3.50t2 - 2.50t3, with x in meters and t in seconds. In unit-vector notation, what is the net force acting on the particle at t = 3.45 s? I tried solving using s=Vit + (.5)at^2 but I can't find ...

**Math**

First Estimate, and then multiply to get the exact answer. 2*4/7*7*5/11*5

**Math**

First Estimate the answer. Then find the exact answer. Simplify your answer if possible. 9*2/7*8/5/7

**Math**

First Estimate the answer. Then find the exact answer. Simplify your answer if possible. 9*2/7*8/5/7

**Math**

First Estimate the answer. Then find the exact answer. Simplify your answer if possible. 2*1/3*15

**chemistry.**

They are__________Mol of carbon atoms in 4 mol of Dimedthysulfoxide A: 2 B: 6 c: 8 D: 4 E: 3 My answer is C:8 but can any one help me with the method to show the right answer. 2. There are ___________Sulfur atoms in 25 molecules of c4H4S2. My answer is 50...Can one help me. 3...

**math**

thank you

**math**

Is The factors of 385 = 1,5,7,55,77,385?

**Science**

THis is also known as an alchohol. a)hydroxyl group b) amino group c) phosphate group d) carboxyl group

**Science**

The typical ratio for a carbohydrate is a) CHO b) C2HO c) CH2o d) CHO2

**Math**

% increase in mean population from 1950 = 2,556,000,000 to 2000 = 6,279,000,000 =

**Math**

Write 116 2/3 as a fraction or mixed number.

**Math**

I need to find the missing length of a right angle if one side is 7 and one is 25?

**Biology**

Can some body help me to explain how DNA is formed?

**language/reading**

have summer project. need to do timeline on the book "THE WALKABOUT" need to know how to go about doing this correctly.

**algebra**

I think that the answer is 2/100=50/2 cross multiply it to make it 2x2=4 and 50x 100 is 5000 or 2/100= 2/50 cross multiply it to get 100 and 200 divide it by 2 to get 100 and to get 50...I think i messsed up :/

**Classroom Management**

Your the teacher, he is the student. There said, your in charge and he isn't. Assuming, you don't to anything that violates your teacher to student relationship you be just fine. My advice is to ask if it should happen again to please move, if something similar happens...

**LaL**

what does the chick's behavior in the poem teach you about what to do when you don't know what to do.

**Physics - URGENT**

Actually, I think it should be: KE of bullet@bottom = KE of block&bullet@top + PE of block&bullet@top Is that right?

**Physics - URGENT**

Wouldn't it be KEbottom = KEtop without the mgh term since there's no height at the bottom?

**Physics - URGENT**

So mg=mrw^2? (and how do I find the w at the top of the loop?)

**Physics - URGENT**

A small block of mass 5 kg initially rests on a track at the bottom of a circular, vertical loop-the-loop, which has a radius of 0.8 m. The surface contact between the block and the loop is frictionless. A bullet of mass 0.7 kg strikes the block horizontally with initial speed...

**english**

imagine many years from now someone is writing a story about my life .how will the author describe me? what major accomplishments will he or she highlight?clue i like making airplanes.

**7th grade**

Maria left the starting line at 8:30 a.m. and drove at an average rate of 40 mph. What time did she arrive at check point 1?

**Physics**

An upright spring which is normally 3 m is compressed 2.3 m and a 2 kg block is placed on it. When it is 5 meters above the ground it is going 10 m/s. What is the spring constant of the spring? How high will the block travel?

**8th grade**

If f(x)=4x-5 find the value. f(c) f(3a2)

**Statistic**

You shouldn't be trying to get answers to the final here!

**PHSICS**

a=gsin(theta) a=9.8 sin 25° a= 0.43 Uf=Ui +at Uf= 0 + a(10) Uf=0 +4.3 Uf=4.3 m/s

**6th grade math**

28 x 15 simplify by using distributive property,

**art**

what is a motief

**hardware**

what is hardware

**7th grade math**

idontknow

**math**

write 3x^2 +8x-25 in the form a(x+h)^2,where a,h and k are real numbers

**math**

determine Q whenT=73.16 Given T=47.4é^0.31Q (It is e raised to 0.31Q where Q=Theta

**Math**

Thank you!!

**Math**

Hello! Please help me out here. How do you find the circumference of something when you of 13in as your radius? Please answer this question.

**math**

5+5/10=5 1/2. If you were talking about fractions you to make into the simplest form after adding the equation.

**Science**

How do scientists separate aniamals into classes?

**American History**

But why there were The Stamp Act?

**American History**

Why did King George III taxed the colonists?

**Indiana History**

On my homework it said name many plains and lakes etc.

**Indiana History**

Name all the land features such as mountains, plains, deserts etc.

**chemistry AP**

Also, does the relatively high specific heat of water play a part in this? Because it would take large amounts of energy to raise the temperature of the sweat, therefore keeping the sweat cool.

**English**

Reading the book Twilight by Stephenie Meyer. Will have to write book report in class 11/13/07. Has anyone read the book and written a book report on it.

**science**

if a substance is known to enter a cell by diffusion, what effect would raising the temperature have on the cell? Why does it have this effect?

**Logs-check my anwers**

567/2

**Chemistry**

Consider a system of three molecules A, B, and C. Suppose that three units of energy can be distributed over the three atoms. Each atom can have no energy, one unit of energy, two units of energy, or all three units of energy. Assume that each of the ten possible arrangements ...

**Math**

88 as well

**Probability**

Bump

**Probability**

Consider a system of three molecules A, B, and C. Suppose that three units of energy can be distributed over the three atoms. Each atom can have no energy, one unit of energy, two units of energy, or all three units of energy. Assume that each of the ten possible arrangements ...

**science**

What is the order analytical method fundamental to ? I know two of them are taxonomy, biochemistry. I need to know the third one.

**mathFormula**

Formula for calculating cubic feet. length(in feet) x width(in feet) x height(in feet) = volume in cubic feet. Thank you DrBob That's for a cube or four sided regular figures. For a cylinder, it's pi*(radius2)*height and there are other formulas for other figures.

**physics**

IF A 0.5 Kg baseball(at rest) is hit by a bat with a force of 200.0 N what is the magnitude of the baseball just as it is leaving the bat?

**Bio- Genetics Quest.**

A freind of yours brings up the idea that, if a person's gene were all identified and sequenced, he would be able to tell everything about that person: what they look like, how they might act, even how they will progess in life, and how long they would likely live. Is this...

**Business Law**

Consider what this rule might mean to businesses, particularly those that contract with the government. Consider, for example, a store or outlet that purchases federal/military surplus. What provisions might they need to include in a contract that might not be required in a ...

**physics**

12.04 m

**BIO ?'s**

Why is life based upon the cell? More or less, why are cells necessary for life? Is there a limit to how large a cell can be? ** If anyone can help or just give me an idea to go on for this it would be helpful! Even a good site to start research! THANKS! There may be life ...

**org. chem**

why is it easier to remove excess acetic acid from the products than excess isopentyl alcohol? from the products of what? Did you perform an experiment in class and this is one of the lab questions? If so you will need to explain what you did in some detail; otherwise, we'...

**Math- fraction equations**

3/2 d[1/4]=1/3

**Chem.**

If 0.130 g of p-aminophenol is allowed to react with excess acetic anhydride , what is the theoretical yield of acetaminophen in moles? In grams? p-amino. - MW: 109.13g aceta. - MW: 151.16 g ** I just forgot how to do this, I know it's probably REALLY simple. I took a stab...

**Muscular Energy**

what is muscular energy

**ORG. CHEM- Extraction Conclusion**

Does this sound okay, if not how might i improve it? Thanks. In this lab the purpose states that the method of extraction is to separate and distil two different immiscible liquids, an organic layer and an aqueous layer. In this experiment an ion transfer was apparent when the...

**Lab conclusion- HELP!**

I' am currently trying to wrie a couple of lab conclusions and having a hard time coming up with good points to make for the following lab experiment: Thin layer chorotography If anyone has a few minutes to give me a couple tips on how to improve this. I think it sounds ...

**More Organic Chem.**

1. Would you expect ibuprofen to be soluble or insoluble in 1.0 M NaOH? Explain. 2. Thymol is very slightly soluble in water and very soluble in 1.0 M NaOH. Explain. Any info. would help! Below are two web pages. The first shows ibuprofen has a -COOH group which makes it an ...

**Organic Chem.**

When a tlc plate was developed the solvent front ran off the top of the plate, why? A two component mixture containing a dicarboxylic acid and tricarboxylic acid gave only one spot with an Rf value of 0.05. Solvent used; hexane. What went wrong? Solvent runs off the top ...

**Intermediate Algebra**

Am I going in the right track? 8x -1/x + 5x - 3/2x = 16x^2 - 2x/2x^2 + 5x^2 - 3x/2x^2 16x^2 - 2x + 5x^2 - 3x/2x^2 =21x^2 - 5/2x^2 Find the LCD 6/7z- 28, 8/x^2 -4x = 7x(x-4) Simplify 3x^2 - 2x/15x-10 = x/5 Let's start by looking at your first problem: 8x -1/x + 5x - 3/2x To...

**Nouns**

Our son's 3rd grade teacher gave out a homework assignment which had the students make a sentence for each of their spelling words and then circle the "noun" in the sentence. We received his homework back from the teacher with the words, "I, you, He", ...

**Noiuns**

Our son's 3rd grade teacher gave out a homework assignment which had the students make a sentence for each of their spelling words and then circle the "noun" in the sentence. We received his homework back from the teacher with the words, "I, you, He", ...