Friday

April 18, 2014

April 18, 2014

Total # Posts: 152

**chemistry**

Assume that no heat is lost to the surroundings and calculate the enthalpy involved when 200. mL of .10 M potassium hydroxide and 200. mL of .10 M hydrochloric acid are mixed. Both solutions began at room temperature, 24.5 degrees celsius, and have densities very close to 1.00...

**spanish**

when do you think they will be able to get back to me by? just so I know when to check back :)

**spanish**

if someone could help me conjugate these words correctly id really appreciate it!(sorry, I was unable to put accentos) 1. ?Habra alguien que me (comprender)? 2. Querian que tu (ir) a la biblioteca. 3. Tomas fue a la carcel porque (robar)a alguien. 4. Era imposible que tu el (s...

**Chemistry**

Calculate the energy associated with the photon that would be released when an H electron falls fro the n=3 energy level to the n=1 energy level. show work if possible so I can understand how to do it. Thanks in advance!!!

**geometry**

gerri raced around all the faces of a three-dimensional shape.she drew the following polygons.what three-dimensional was gerri tracing.

**Chemistry HELP PLEASE!!**

you're a life saver

**Chemistry HELP PLEASE!!**

write the oxidation and reduction half-reactions that occur at the anode and cathode, respectively, when MgCl2 liquid is electrolyzed using inert electrodes. HELP PLEASE!!!

**chemistry**

in regards to electrochemistry, Can Na metal displace Zn2+ in a single replacement reaction?

**chemistry**

a solution of 2.5 M weak acid is .52% ionized. what is the Ka value of this acid? ive been stuck on this one for a long time and cant figure out where to even start...if someone could walk me through this itd be great! thanks

**Single vs double replacement reactions**

a single replacement is a reaction between a compound with two species and a compound with one species such as: 2NaOH + H2 ==> 2Na + 2H-OH a double replacement reaction is where two compounds, both with two species react such as NaOH + HCl ==> NaCl + H-OH

**chemistry**

I am stuck on this one and was wondering if anyone can help me out! Why does sodium nitrate (166.5) have a bigger molar entropy than sodium bromide (86.8)? Thanks!

**health & safety**

Serious violations were issued citing 29 CFR 1910.252(a)(2)(iii)(B) and 1910.252(b)(2)(i)(A). Using the PDCA framework, develop a plan that will correct the deficiencies and ensure that the violations do not recur.

**environment**

thx!!

**environment**

im not very familur with either of these. just looking for a starting point.

**math **

what is the surface area of a right cone with a diameter of 15 units and a slant height of 34 units.

**math**

i think you made a mistake ms sue the and is 301.44 not 30.44 as you stated

**math**

surface area is 2 pi r^2 + 2 pi rh. therefore 2x(3.14)x(4) + 2x(3.14)x2(22)= 301.71 units. is this answer correct ms sue

**math**

what is the surface area of a cylinder with a radius of 2 units and a height of 22 units

**Math**

what is the surface area of a sphere with a radius of 4.75 units

**geography**

Why did america grow geographically

**science**

I need an example of an acrostic poem for the word kinetic please help!!!!!!

**math**

the ans is 16... x+2x-5=43..... therefor 3x=48 then divide both sides by 3 to solve for x

**Math**

very simple!!! they drank 10 quarts and in total we have 24 quarts because 4quarts=1 gallon therefore 6x4=24 quarts or 6 gallons.... subtract the amount of quarts they drank from the total amount of quarts which is 24... Answer is 14 quarts remaining

**statistics**

about what percent of the bags of pet food weigh less than 49.8 lb?

**math**

(8 x____) x 5 = 8 x ( 20 x 5).. third grade question please help me solve

**MATH**

six-eighths and fifteen-twentieths

**Calculus**

Suppose x^2+1>= f(x) >= 4x-3 for all x. Compute lim f(x) x->2

**medical**

a. xenology b. morphology c. xenomorphology d.monumentology Which one of the above answers are the study of the form of body parts is called?

**Medical Billing**

1. Hospitals 2.Insurance forms 3.Billing services 4.none of the above Which one of the above words are required to keep a list of acceptable abbreviations?

**math**

solve 27^2x-1=(1/81)^x

**math**

simplify (1+3i)(1-5i)

**math**

solve(x-1)^2=-4..... i used the quadratic formula but got stock ... please help thank you

**math**

please help... evaluate (27^1/9)^3

**math**

solve for x 1/2x + 3/4x= 7/8x^2

**Math**

Square root of 218

**Math**

Squar root of 218

**Math**

Solve for x: x^2 -2x-4=0

**Physics**

(the drawing is of a square with each side equaling L and the opposites of each corner are equal to each other, so the mystery corner would be 3I) Four parallel long straight wires are carrying current perpendicular to the page, and the points at which they pass through the pa...

**Math**

At a summer camp there are 60 girls and 30 boys. Twenty percent of girls and 40% of boys passed the swimming test. What percent of the campers passed. Please show working.

**Math**

A bill for a meal is $10.38 including tax. Find the total cost if the customer leaves a 15% tip.

**Math**

The reason why I am confused is because 81.25 / 125=65%. Therefore it means you got 43.75 questions wrong. Since 42 is fewer questions wrong you should pass...

**Math**

A test has 125 items. Each correct answer earns 1point and 65% is a passing grade. If you get 42 answers wrong will you pass? Show working

**math**

First convert all the measurements to inches by using the formula 12 inches= 1 foot.. Therefore 23' - 11"= 287".. 25'- 2"=302".. 18'-3"=219".. 28'- 8"= 344".. 32'- 4"=388"..... Which gives a total of 1,540&q...

**Math**

Pat paid $35 for a shirt that originally cost $50. What percent of the original price did the shirt cost? Please show working. I calculated it to be 30% but the answers provided are (a) 40% (b) 65% (c) 70% (d) 85%.........Please Help me

**Pre-Algebra**

A whole number is an integer.......A repeating decimal is a real number. Real numbers are either rational or irrational

**Math**

The sticker price of car is $15,800. If the sales tax is 8% what is the total cost? Show working

**math**

A test has 125 items. Each correct answer earns 1point and 65 percent is a passing grade. If you get 42 answers wrong will you pass? Show working

**APUSH**

Trusts emerged in industries (such as oil and steel) due to competition. Allying with competitors to monopolize markets was also common. People wanted to have more money and be better than their competition, so they would join together (in trusts) and monopolize their rivals. ...

**grammar**

Below the main level, we have a large playroom. What part of speech is below

**Physics**

A fish at a pressure of 1.1 atm has its swim bladder inflated to an initial volume of 8.16 mL. If the fish starts swimming horizontally, its temperature increases from 20.0 degrees Celsius to 22.0 degress Celcius as a result of exertion. A)Since the fish is still at the same p...

**Physics**

A cylindrical diving bell 4.0m tall, with an open bottom, is lowered to the bottom of a lake on a day when atmospheric pressure is 100 kPa. It is observed that water rises inside the bell to within 1.0m of the top. A)What is the pressure of the air trapped in the diving bell? ...

**Physics**

A fossil-fuel power plant that generates 1000MW of electrical power discharges 1600MJ per second as waste heat into the river. A)At what rate(in MW) is thermal energy obtained fromt the burning of coal? B)What is the thermal efficiency(power output/heat input) of the plant? C)...

**math**

Add and simplify. 3/4+1/10+7/15

**Geometry**

A kite has diagonals of 16 inches and 23 inches as seen below. What is the perimeter of the kite?

**physics**

A tugboat pulls a ship with a constant net horizontal force of 5200 N and causes the ship to move through a harbor. How much work is done on the ship if it moves a distance of 3 km?

**physics**

Approximate the gravitational force of attraction between a 42.0 kg girl and a 56.0 kg boy if they are sitting 3.0 m apart in physics class.

**physics**

A girls sits on a tire that is attached to an overhanging tree limb by a rope. The girl's father pushes her so that her centripetal acceleartion is 3.8 m/s2. If the length of the rope is 3.3 m, a) what is the girl's tangential speed? b) If the magnitude of the force th...

**physics**

A 905 kg test car travels around a circular track with a circumference of 3.25 km. If the magnitude of the force that maintains the car's circular motion is 2140 N, what is the car's tangential speed?

**5th grade spelling**

The antonyms for dry

**Physics Spring**

2(1)/.12^2=138.88888888889=138.9N/m F=kx = mg=kx => ma=kx => m=kx/a (138.9(.12))/16 = 1.04kg

**physics**

A 25 kg chair initially at rest on a horizontal floor requires 360 N horizontal force to set it in motion. Once the chair is in motion, a 316 N horizontal force keeps it moving at a constant velocity. a) Find the coefficient of static friction between teh chair and the floor....

**physicss**

What average force is required to stop an 1100 kg car in 9.1 s if it is traveling at 83 km/h?

**physics**

A freight train has a mass of 5 x 107 kg. If the locomotive can exert a constant pull of 12 x 105 N, how long would it take to increase the speed of the train from rest to 85 km/h

**physics**

A 7 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 1.4 m/s2, find the force exerted by the rope on the bucket of water.

**Science**

I have to make a book about Potassium. What are some cool wasy a can make a book from scratch?

**physics**

A small weather rocket weighs 15.5 N. The rocket is carried up by the balloon. The rocket is released from the balloon and fired, but its engine exerts an upward force of 11.0 N. What is the acceleration of the rocket?

**6th grade**

no

**algebra**

How do you factor 2w^2+11w-30 ???

**Algebra**

2. Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $2,500 for setup costs and $3.00 to administer each test. a. Write an expression that gives the total cost to test x animals. b. You can fin...

**Algebra**

1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by a. What is the cost to remove 75% of the pollutant? b. What is the cost to remove 90% of the pollutant? c. What is the cost to remove 99% of the pollutant? d. For what value is this equation u...

**Algebra**

F) Why is (3x + 5) (x - 2) + (2x - 3) (x - 2) not in factored form? What is the correct final factored form? What is this factoring method called?

**Algebra**

I think I got it, but thank you very much:)

**Algebra**

4. A customer wants to make a teepee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the teepee, and he wants the teepee to be 12 feet across and 8 feet tall (see figure). How long should the pieces of PVC plumbing pipe be?

**Algebra**

3. In 2002, Home Depot’s sales amounted to $58,200,000,000. In 2006, its sales were $90,800,000,000. a. Write Home Depot’s 2002 sales and 2006 sales in scientific notation. You can find the percent of growth in Home Depot’s sales from 2002 to 2006 by following t...

**5th grade**

sometimes called the simplepredicate.

**6th grade**

states what the subject does is or has in asentence.

**math**

how to do this divison problem 6)5.88=

**Physics**

f=ma => kx/m=v/t slove for t

**algebra**

Hello, I need help with this problem use point slope form to find the equation of the line with given properties write equation in given form m=-7 passing through (3,0) = 21

**6th grade**

how do I get 18 from these numbers: 9 18 20 24

**Algebra**

M is 5 years older than N. The product of their ages is 84. How old is M?

**Algebra**

I'm not sure how to factor x^3-4x is greater than/equal to 0 so that I can find the zeroes. Can you demonstrate, please?

**Algebra**

x^3-2x^2-9x-2 is greater than or equal to -20. I got (-9+x^2)(x-2)(x-2). That would mean for the first grouping, the answer would be -3 or 3. My book listed them separately. Could I instead go +/- 3? I then got double root of two. But my book says the other answer is infinity....

**Algebra**

I'm trying to solve x^3-3x^2-x+3 is less than zero. Except, I'm not sure how to factor it. I tried splitting it so that 3 would be a factor for 3x^2 and 3, so the result was 3(-x^2+1), and x^2 was a factor for x^3 and -3x^2, resulting in x^2(x+3). But this will be real...

**Ms. Sue**

Say you make the following assumptions: 1. Afarmer lives on 1 hen per day for a year. (2.)1 hen eats 25 grasshoppers per day (3.)1,000 grasshoppers have a mass of 1 kg (4.) 1 grasshopper requires about 30g of soy beans per year (5.) 1 human requires about 600 grasshoppers per ...

**To Ms. Sue**

You are best and I have learned a lot from you. Everytime you answer my questions I get a good grade. Anyway I am a Cancer patient and I can not focus very well because of the meds I take. But thank you for all the help you have given me so far.

**To Ms. Sue**

How do I calculate how much grain is required to feed you through the chicken you ate for dinner? And is it necessary to really try and calculate it?

**just a ?**

Do you think that it is even possible that we could live in a sustainable way at this point? In other words,even if our population growth decreased and each member of society was willing to contribute to sustainable living and protecting the environment, could the earth still ...

**just a ?**

What do you think about this" Tragedy of the Commons" Idea? Have you ever found yourself saying these same things? r witnessed someone else behaving this way?

**science**

under what circumstances, is it okay to exploit natural area resources for human benefit?

**science**

My answers are lame that is why I need some help with this question.

**science**

What are some things that prevent people from making choices that protect environmental sustainability?

**science**

Would you say,as a whole,we who live on the earth,are living sustainable or unstainable lifestyles.Why? Also in what ways might we be wasting our natural capital?

**science**

Say you have a million dollars that you can invest into a bank account for 10% interest each year. how much money will you have each year to live off of? If you use more than amount,what happens to your original capital? What happens to your sustainability? Relate this to our ...

**Science**

I need help to put a terrestrial resource plan together. I have no clue as where to start.

**Mathematics**

In the universal set (U) reperesents all the students in a class.The set m represents the student who take (Music 3x).The set D represents the students who take (Drama 7+x).If 24 students take Music, calculate The number of students who take BOTH music and drama. The number of...

**physical science**

can volcanoes form anywhere on earth why or why not

**calculus**

i have to integrate using u substitution, but i am not sure if i did it correct. çtan^3(5x)sec^2(5x)dx u=5x du=5dx 1/5du=dx 1/5çtan^3(u)sec^2(u)du 1/5tanusec^2u+c 1/5tan(5x)sec^2(5x)+c

**Latin**

What is the difference between imperfect and past tense? Is imperfect something you did only once, or multiple times in the past? Thanks for clearing this up.