# Posts by Nick

Total # Posts: 1,314

**AP Chemistry**

Although soluble barium compounds are toxic, suspensions of insoluble barium sul- fate are routinely swallowed for upper gas- trointestinal X-ray studies. Why is barium carbonate not used? 1. Barium carbonate is too expensive. 2. Barium carbonate is soluble in plain wa- ter. 3...

**math**

m of angle 7=2x + 10 m of angle 3=3x - 15

**calculus**

thanks

**calculus**

Assume a substance has a half-life of 11 years and the initial amount is 144 grams. How much remains at the end of 5 years? How long will it be until only 30 % remains?

**language**

I am trying to do a report on the following and can't find any sites that contain info to make report. Looking for various types of humans that have lived on earth since time began. thanks for any help

**college- strength of material**

Thnx drwl but i knw the fomulas but i dnt knw hw to plot a graph wen juz max load is given.

**college- strength of material**

i have initial and final gauge length and diameter and also have max load. Now i have to draw stress strain diagram. I know how to draw that graph but i a not provided with failure load or yield load so i am not sure how to graph. We had performed experiment and data was given...

**college**

hey we performed experiment and lecturer mailed the results which doesnt have any series of results just one result. And gauge length is length of the specimen used.

**college**

I have initial and final gauge length and diameter and also have max load. Now i have to draw stress strain diagram. I know how to draw that graph but i a not provided with failure load or yield load so i am not sure how to graph. Appreciate any help. Thanx in advance

**Chemistry**

(50g)(0.107 cal/g degreesC)(tfinal-15C) +(25g)(1.000 cal/g degreesC)(tfinal-45C) is this correct

**Chemistry**

what is the final temp of the combination when 50 grams of chromium at 15 degrees celcius is added to 25 milliliters of water at 45 degrees celcius?

**trigo**

sin 47 degree 29 minutes = x/4728 x=4728(sin 47 degrees 29 minutes) x=3484.92m cos 47 degree 29 minutes= y / 4728 y= 4728(cos 47 degrees 29 minutes) y= 3195.20 m Am i correct?

**business communication**

Your boss wants to send a brief email message welcoming employees recently transferred to your department from your Hong Kong branch. They all speak English, but your boss asks you to review his message for clarity. What would you suggest your boss change in the following ...

**Physics**

Agree with Charlie, but try finding the net force and use Newton's 2nd law maybe.

**English**

So you go to Keystone Online Highschool? 9th grade? Me too. These answers were very helpful in me constructing my own answers. And you made many spelling errors, you also only had 1 space instead of 2 spaces after a period in many places. You should try putting your papers ...

**Management**

How is control related to planning, leadership, and to organizing? I know what the definition of control means in management. I just do not understand how control is related to planning, leadership, and organizing.

**algebra 2**

can somebody tell me how I am to solve this problem? x+8)(x-19)(x+3)>0 A. The solution set is {x|___} B. The solution is all real numbers. C. There is no solution.

**PARTICLE PHYSICS**

particle A has a mass of 2 and a charge of -1. particle B has a mass of 2 and a charge of +1. are particle A and particle B necessarily antiparticles? explain your answer

**physics**

19.6

**Chemistry**

15. What volume of NH3 at STP is produced if 25.0g of N2 is reacted with an excess of hydrogen gas? N2 + 3H2 →2NH3

**fluid mechanics**

I have got differential pressure from an inclined manometer to be 2.8kPa and density of the fluid is 784kg/m^3. I need to calculate the manometer datum height. how do i do tht?? i already did it using formula pressure=density*g*h but i want ans to be 0.165 meters which i dnt ...

**fluid mechanics**

yes i used the ame formula but didn't get the correct ans. cn u help me solve it. i want ans to be 6.5 inch (0.165 meters).

**fluid mechanics**

I have got differential pressure from an inclined manometer to be 2.8kPa and density of the fluid is 784kg/m^3. I need to calculate the manometer datum height. how do i do tht?? thnx for the help in advance.

**Math Algebra 1a**

Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get a 360-lb mixture that is 10% protein? Cornmeal-how many pounds:__________ Soybean meal-how many pounds:______

**m/c**

sample statistic

**Geometery**

How would I calculate the perimeter of a hexagon (which can be divided into 6 congruent equilateral triangles) which is inside a circle with an area of 314^2 cm? Many thanks

**Math**

How would I calculate the perimeter of a hexagon (which can be divided into 6 congruent equilateral triangles) which is inside a circle with an area of 314^2 cm? Many thanks

**Algebra**

Hi, how would I factorise x^2-100?

**College Chemistry**

A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...

**Chemistry**

A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...

**polymer chemistry**

A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...

**chemistry**

A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...

**math**

A sheet of plywood measures 4 feet by 8 feet. Armand wants to build a dog house using one whole sheet of plywood for the floor. a. Armand needs to put a "2 by 4" under the outer edges all the way around the floor, and another "2 by 4" that runs down the ...

**Chemistry 102**

For a question like “calculate the pH of an aq.solution that is 1.0 M CH3COOH and 1.0 M CH3COONa, how do you know to write the equation like this: CH3COOH + H2O => H3O+ + CH3COO- and not like H3O+ + CH3COO- => CH3COOH + H2O for the ICE chart. This would switch the ...

**chemistry**

SO2 (5.00 g) and CO2 (5.00 g) were placed in a 750.0 mL container at 50.0 °C. The partial pressure of CO2 in the container was __________ atm.

**Physics**

given; r2 = 0.05 m r1 = 0.01 m Q = 10 liters/min = 10 E-3/60 = 1.67 E-4 m³/s P2 = 10^5 Pa ρ = 1000 kg/m³ no. # (a) Q = (A2)(v2) Q = π(r2)²)(v2) 1.67 E-4 = π(0.05)²)(v2) V2 = 0.0212 m/s no. # (b) V1 = (r2/r1)² (V2) = (5/1)² (0.0212) ...

**Physics**

A) V1= 10L/((pie)(.05^2)(1000)(60))=.0212m/s B) V2= 10L/((pie)(.01^2)(1000)(60)=.5307m/s C)P=P1 - P2 = 1000*[(.0212)²/2 - (.5307)²/2] P1 - P2 = 140.5 Pa P2 = 10^5 - 140.5 = 99859.5 Pa.

**Math 102**

if you have a pizza with a diameter of 20 that is cut equally into 4 pieces, one way horizontal and one way vertical. how do i figure out where to place 2 non-center vertical cuts so that the pizza has 8 equal parts? i found the area for the circle to be 314.159 (divided by 8...

**5th grade**

Find the numbers that each letter stands for in the problem below. EFGH X 4 = HGFE E= F= G= H=

**Science**

That depends on the density of the object along with bouyancy. A 2g rock will sink in water whereas a 2000 kg boat will not (if made right). It doesnt matter what something weighs. An object floats because it displaces an amount of water equal to or more than its own weight. A...

**math**

Essentially you look for key words. "At most", "no more than", "does not exceed", etc. would mean less than or equal too. Taking your example, if the cost is at most $4857.95, then it could be less, but it cannot be more. When x is less than or ...

**chemistry**

I did the moles of Cl found/1 L = .00863. 1.8e-10 / .00863 = 2.1e-8 * 1 L = 2.1e-8 moles .0010 / 2.1e-8 = 47619 L*1000 mL / .5 but the answer comes out wrong=/

**chemistry**

ag2so4 ksp = 1.5 e10-5

**chemistry**

A certain municipal water sample contains 46.1 mg SO42-/L and 30.6 mg Cl -/L. How many drops (1 drop = 0.05 mL) of 0.0010 M AgNO3 must be added to 1.00 L of this water to just produce a precipitate? What will this precipitate be? how do i do this problem? agcl ksp = 1.8 e-10

**Chemistry 102**

A certain municipal water sample contains 46.1 mg SO42-/L and 30.6 mg Cl -/L. How many drops (1 drop = 0.05 mL) of 0.0010 M AgNO3 must be added to 1.00 L of this water to just produce a precipitate? What will this precipitate be? How do i start this question? please help

**Chemistry 102**

The Ksp for cerium iodate, Ce(IO3)3 is 3.2 e-10. What is the molar solubility of Ce ion in pure water? = .0019 M B) A 0.031 M sodium iodate is added as a common ion. What is the concentration of Ce ion with the common ion present? C) What is the ratio of the Ce ion with the ...

**math**

mix and match the shake sizes to equal using 3 cups

**math**

Liann works in the old time soda shoppe the shop sells shakes. a single shake uses 1/8 cup syrup, a double shake uses 1/4 cup syrup, a tripple milk shake uses 3/8 cup syrup. How many shakes can she make of each with 3 cups of syrup?

**science**

Given the following reaction, with Kp=1.05 at 250 degrees C what is Kc? The reaction is PCl5 to PCl3+Cl2

**math-trigometric functions and radians**

what is the tangent of pi/5, the cotangent of pi/7, and the co secant of pi/6?

**Algebra II**

I'm trying to factor this and I just can't figure it out. Help? r^4 s^4 - 81

**calculus high school**

Chain Rule with single variable: d/dx [3(2x-4)^2] =6(x-4)(2)=12x-48 Chain Rule with multiple variables: d/dx [3y^2] =6y(dy/dx) The y and the (x-4) terms serve a similar function. You technically use the chain rule all the time. The derivative of a variable, like x, is simply 1...

**Geography**

that link ^^^^^^^^^^^ is a dead link buddy :P

**English**

and the adverb

**English**

Type the complete adjective or adverb phrase in this sentence. The red coat was sent by my aunt. Adjective/adverb phrase:_________

**English**

Type the complete adjective or adverb phrase in this sentence. The house with the green shutters is quaint. Adjective/adverb phrase:________

**English**

Identify the type of conjunction in the following sentence. We'll be able to eat when Grandma arrives. A)conjunctive adverb B)coordinating conjunction C)correlative conjunction D)subordinating conjunction

**English**

lolz thanks

**English**

sorry its someone

**English**

Type the correct personal pronoun in place of the noun or nouns in parentheses. I'm not sure it's a good idea to give the candy to (the children) ____? .

**English**

Identify the word in bold type. THIS is the dog I was telling you about. A)demonstrative pronoun B)indefinite pronoun C)interrogative pronoun D)relative pronoun E)not a pronoun

**English**

Type the correct pronoun in the box. Each of the students must give ___?___ presentation next Tuesday

**English**

sorry the word is dog

**English**

Identify the word in bold type. This is the dog I was telling you about. A)demonstrative pronoun B)indefinite pronoun C)interrogative pronoun D)relative pronoun E)not a pronoun

**English**

Identify the word in bold type. None of those bagels look fresh. A)demonstrative pronoun B)indefinite pronoun C)interrogative pronoun D)relative pronoun E)not a pronoun

**English**

Select the correct pronoun: "Go find ___ and say what you have to say." A)him B)he

**chemistry**

5.1 L

**math-word problem- PLEASE CHECK MY ANSWER**

tickets for a school sell for $8 for floor seats and $6 for balcony seats. For one performance 72 tickets were sold, bringing in $516. how many tickets were sold

**math**

what percent of 300 is 60 F)20% G)50% H)2% J)5% i think I'm just doing it wrong because i got (180) and then the 2 time i got (500) so do you mind telling me what Am doing wrong

**math**

but i get 4/5 then the answer would be k then right

**math**

oh oh i just thought that it would be f cause it's just .5 off

**math**

what percent of 80 is 32 F)25% G)2.5% H)0.4% J)40% K)none i got 25.6% what is it then

**science**

Liters and milliters are used for measuring?

**science**

mass is usually measured in?

**Science**

Which foods contain solids,liquids, and gases?

**science**

Which foods contain solids,liquids, and gases?

**World HIstory**

What is the Rescue of Dunkirk?

**biology**

its know that high plumage color in birds causes then to compete for nests better than dull birds. how does the hypothesis that males with high plumage color make offspring high plumage color support the first statement?

**chemistry**

A dilute sulfuric acid solution that is 3.39 molality H2SO4 has a density of 1.18 g/mL. How many moles of H2SO4 are there in 375 mL of this solution?

**Chemistry**

its m = molal

**Chemistry**

A dilute sulfuric acid solution that is 3.39 m H2SO4 has a density of 1.18 g/mL. How many moles of H2SO4 are there in 375 mL of this solution? 3.39 is 3.39 Molality not molarity

**world history**

how did japan and china feel about the europeans

**MATH**

M + 6 = 4XM M=? ON A COORDINATE GRIDE, WHAT IS THE DISTANCE FROM A(4,9) TO B (4,3)

**math**

using 1,2,3,4 only one time and must equal 29

**history**

how does this answer what i put

**history**

A formal, systematic essay or book on some subject is called a

**Chemistry**

If you have 108 grams of Al and 108 grams of O subscript 2 which reactant is the limiting reactant?

**Chemistry**

If you have 4.00 moles Al(aluminum), how many moles of O (oxygen)subscript 2 are needed for a complete reaction?

**Science**

A tiltmeter is a volcanic monitoring tool that measures _____. a)vibrations and tremors in the ground b)smoke plumes c)ground swelling d)water levels do you mind exp it a little bit better thanks

**World Geography**

thanks a lot

**World Geography**

please Write a short essay comparing the ways in which command economies and market economies affect a worker's life? or if you want exp it a little better to me.

**social studies**

how did china and Japan feel about the europeans moving westward

**prealgebra**

3/5y+8 ------ 3/5y-8 simplify

**prealgebra**

3/5y+8 ------ 3/5y-8 simplify

**Science -CLIMATE**

Explain how different temperatures on earth create winds.

**geometry**

what is a quadrilateral shape with adjacent sides not equal; 2 pairs of conguent sides; 4 right angles?

**algebra**

Simplify 5-3(x-1) what are the steps?

**science**

why don't earthquakes form on the san andreas fault?

**Literature**

It was very well written, I hope you got a good grade.

**Math**

The sum of my two digits is 13. I am not divisible by 2. List all possible numbers I could be.