Saturday

February 28, 2015

February 28, 2015

Total # Posts: 335

**physical science**

How long would it take a 20.0 hp motor to lift a 1,000.0 kg crate from the bottom of a freighter's hold to the deck (40.0 m)?
*June 23, 2011*

**physical science**

What is the kinetic energy of a 27 kg dog that is running at a speed of 8.3 m/s (about 19 mi/h
*May 31, 2011*

**math**

solve 5/8 of 22
*May 26, 2011*

**algebra**

What is the value of the expression 2x to the 2nd power + 3xy -4y to the 2nd power when x = 2 and y = -4? please show how to solve this
*May 21, 2011*

**Grammar**

This does raise the possibility of early left ventricular failure, however there is no pulmonary edema and no acute infiltrates.
*May 9, 2011*

**social studies**

what landform dominates much of Latin America , especially South AMerica?
*May 4, 2011*

**PHYSICS**

5.00x 10^-2 mass with charge +0.75 micro coulombs is hung by a thin insulated thread. Charge of -0.9 micro coulombs is held .15meters directly to the right so that the thread makes an angle with the vertical. What is the angle and the tension in the string?
*March 29, 2011*

**stats**

sample was obtained from a population with unknown parameters. scores: 6, 12, 0, 3, 4 compute the sample mean and sandard deviation. compute the estimated standard error for M.
*March 27, 2011*

**Finance**

since its just after they deposit 1,000 then you multiply 29,000 x .06 = 1740. then add that to 30000 because they just deposited the 1,000. then you get $31,740
*March 21, 2011*

**Physics: Phase changes**

how much heat is needed to convert 500g of water at 100 degrees C to steam at 100 degrees C?
*March 21, 2011*

**7th grade Math **

divide: 306.52/19.4= 15.8
*March 21, 2011*

**Algebra**

You have to plug 4x^2 into the square root. the answer is 2x because the square root of 4 is 2 and then the x just stays with the 2.
*March 21, 2011*

**ECONOMICS**

WHAT DO GOVERNMENT STATISTCIANS CALCULATE GDP BY SIMPLY ADDING UP TOTAL SALES OFALL BUSINESSFIRMS IN ONE YEAR?
*March 3, 2011*

**statistics**

The population of SAT scores forms a normal distribution with a mean of Âµ =500 and a standard deviation of Ïƒ =100. If the average SAT score calculated for a sample of n = 25 students, a. What is the probability that the sample mean will be greater than ...
*February 27, 2011*

**chemistry**

"A 280ml flask contains pure helium at a pressure of 754 torr . A second flask with a volume of 475ml contains pure argon at a pressure of 732 torr . If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium? ...
*February 26, 2011*

**college algebra (maths 112)**

actually this is only freshman (HS) math but i still don't remember how to do it
*February 24, 2011*

**Chemistry**

Samples of Neon and helium are placed in separate containers connected by a pinched rubber tube. There is 5.00 liters of neon at a pressure of 634 mm Hg in the first container. The second container has 3.00 liters of helium at 522 mm Hg. When the clamp is removed from the ...
*February 18, 2011*

**chemistry**

All of the lanthanide metals react with HCl to form compounds having the formula MCl2,MCl3,or MCl4 (where M represents the metallic element). Each metal forms a single compound. A chemist has .250g sample of a transition metal, and wishes to identify the metal. She reacts the ...
*February 9, 2011*

**chemistry**

If you have a 37.34g sample of ammonium chromate , how many protons do you have?\
*February 9, 2011*

**algebra 2**

suppose a house that costs $270,000 appreciates by 5% each year. in about how many years will the house be worth $350,000? use the equation 350 = (270) (1.05)^x and round the value of x to the nearest year.
*February 7, 2011*

**algebra**

(36x^3-60x^2-87x-21)divided by 9x+3
*February 3, 2011*

**math**

How could knowing that 35/7 equal 5 help you find 42/7 explain
*January 26, 2011*

**uOFp**

Imagine you are conducting fieldwork and discover two groups of mice living on opposite sides of a river. Assuming that you will not disturb the mice, design a study to determine whether these two groups belong to the same species
*January 24, 2011*

**MATH**

7 hrs
*January 12, 2011*

**chemistry**

How many moles of water, H2O, are present in 75.0 g H2O?
*December 15, 2010*

**science**

please help me unscramble oaoptvaien,aionitnrptsa rawdoungete & ntsiocnndeoa
*December 13, 2010*

**sociology**

I second that Stine.. I'll give you guys a hint, it has partiality to do with Conflict Theory.
*December 3, 2010*

**Math **

Donna and Rod bought a new van at an end of year sale for dealer cost plus 5%. If they paid $17,325.00 what was the dealer cost in dollars?
*December 3, 2010*

**6th grade**

wow. i learned something new! thank you both!
*December 2, 2010*

**6th grade**

i'm a little shy on X values sorry, but does that help?
*December 2, 2010*

**6th grade**

Exuse my ignorance, i'm in algebra 1 honors, but is the 7.50 represented by X? meaning 7.50x1/5?
*December 2, 2010*

**6th grade**

1/6
*December 2, 2010*

**math**

what is the question? isolate the X?
*December 2, 2010*

**Algebra**

can i get a formula?
*December 2, 2010*

**Algebra**

Terence wants to estimate the height of a tree. He places a mirror on level ground, as shown in the picture below, and stands so that he can see the top of the tree in the mirror. Since light bounces off the mirror at the same angle at which it strikes the mirror, angle 1 ...
*December 2, 2010*

**6th grade science**

magnetite will attract this
*November 1, 2010*

**science**

magnetite will attract this
*November 1, 2010*

**Physics( Checking answer)**

The first bullet has 2.4 Joules of energy, and the second has 9.6 Joules of energy. The equation is 1/2*m*v^2: You forgot that the mass is given in grams instead of kilograms, so you need to convert to kg (grams/1000, so .003 kg). You also didn't square the velocities. The...
*October 31, 2010*

**Chemisty**

A 5M solution is diluted 1/10 and again 1/5. What is the concentration of each dilution?
*October 31, 2010*

**PreCalc**

what is the cot of theta if the cos of theta = 4/9 and theta lies in quadrant IV
*October 18, 2010*

**calc**

Average daily temp,y, is y=45-23cos(2pi(x-32)/365), where x is time in days, x=1, corresponds to Jan 1 and y is temp in degrees F. Determine the period of the function. Determine critical numbers, over one period. Determine relative extrema, what does relative extrema represents
*October 16, 2010*

**Math**

Depreciation of an office machine. Data regarding the value of a particular color copier is represented in the following graph. At what rate is the value changing?
*September 29, 2010*

**chemistry**

I don't know
*September 3, 2010*

**college**

The value of a mint state 63 uncalculated 1950 Jefferson nickel minted at Denver is 8/7 the value of a 1945 nickel in similar condition minted at Philadelphia. Together the total value of the two coins is 15.00 what is the value of each coin?
*August 29, 2010*

**Math (Very Easy Math)**

Simplified-down to lowest terms;cannot be reduced any more. I hope this helped,this is my own definition.
*July 24, 2010*

**CHEMISTRY (WEBWORK)**

^^ thats right. i just got it.
*July 19, 2010*

**Physics**

While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?
*July 8, 2010*

**Algebra**

Amy paid $67.15 for a pair of running shoes during a 15% off sale. What was the regular price?
*June 10, 2010*

**Geometry 10th grade**

Find the perimeter or given triangle. KLM if JHG~KLM, KM=6, HJ=3, JG= 4, and GH=6. The biggest triangle is FHL. KLM is part of right corner of the big triangle and JHG is the left corner of the big triangle.
*June 7, 2010*

**math**

Math:How could the following information be represented as a ration? Of fifty people interview, none had ever eaten sushi. is it 50:0
*June 1, 2010*

**geometry**

a rectangle field is 130 m by 420 m. a rectangle barn 19 m is built in the field. how area is left ove?
*May 28, 2010*

**human services**

What are some health hazards employees may encounter in human services?
*May 26, 2010*

**chem-redox**

write down Oxidation equation, Reduction equation and Overall equation theres 3 equations *H2O2 + H2SO4 + KMnO4 *H2O2 + KMnO4 *and *Ethanol + H2O2 + K2Cr2O7
*May 16, 2010*

**Algebra 2 with trigonometry**

2sin2xcos2x cos^4x-sin^4x (sinx+cosx)^2-sin2x 2sinxcos^3x+2sin^3xcosx
*May 6, 2010*

**Algebra 2 with trigonometry**

2sin2xcos2x cos^4x-sin^4x (sinx+cosx)^2-sin2x 2sinxcos^3x+2sin^3xcosx
*May 6, 2010*

**Algebra 2 with trigonometry**

A baseball diamond is a square 90 feet on a side. The pitcher's mound is 60.5 feet from home. How far does the pitcher have to run to cover first? (we are using the LAW OF SINES AND COSINES)
*May 6, 2010*

**chemisty**

how many grams of precipitate are produced when 0.300 M K2CrO4(aq) (50.0mL) are added to excess BaCl2(aq)?
*May 4, 2010*

**science**

CO2 binds with water to make carbonic acid (H2CO3)
*April 28, 2010*

**critical thinking**

Premise- Since most all disease can be effectively prevented by a healthy lifestyle. Conclusion-Animal activist sometimes contend that medical research is unneccessary. Is this a valid/sound argument or is this an ivalid/unsound argument?
*April 21, 2010*

**chem - pressure**

i did p1/t1 =p2/t2 converted celsius to kelvin i get 935.5 mmHg for a then 333.2 for b i don't get c
*March 31, 2010*

**chem - pressure**

A closed vessel with volume of 226.9mL initially contained air at 680.8mmHg at 16.5 degrees celcius. A sample of an organic liquid of mass 0.113g was injected into the flask which was then warmed to 124.9 degrees celcus causing all the organic liquid to vaporise. The final ...
*March 31, 2010*

**chemistry**

A closed vessel with volume of 226.9mL initially contained air at 680.8mmHg at 16.5 degrees celcius. A sample of an organic liquid of mass 0.113g was injected into the flask which was then warmed to 124.9 degrees celcus causing all the organic liquid to vaporise. The final ...
*March 31, 2010*

**chemistry**

the answer in the book was 4.3 grams but if you do that you get 169.8731/0.988 which is 171.94 g i don't get it
*March 25, 2010*

**chemistry**

it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?
*March 25, 2010*

**chemistry**

it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?
*March 25, 2010*

**MANAGEMENT ACCOUNTING**

The representation for fixed cost per unit of activity is:
*March 24, 2010*

**marketing- **

Factors Alex should consider include external influences (i.e., culture, subculture, demographics, social status, reference groups, family, and marketing influences) and internal influences (i.e., perception, learning, memory, motives, personality, emotions, and attitudes). ...
*March 15, 2010*

**Accountingt**

ert
*February 22, 2010*

**Chemistry**

The pressure inside a hydrogen-filled container was 2.10 at 21 . What would the pressure be if the container was heated to 96?
*February 2, 2010*

**calculus**

Let F(s)=5s2+1s+4. Find a value of d greater than 0 such that the average rate of change of F(s)from 0 to d equals the instantaneous rate of change of F(s)at s=1.
*February 1, 2010*

**chemistry**

Okay, I guess I should rephrase my question. I know how to go from moles to grams. My REAL question is the dilution part. When I do M1V1 = M2V2, I do (0.562 M)(0.001 L) = (x)(0.05 L), but that doesn't seem right, because the answer is 0.01124 mol and when I convert that to...
*January 31, 2010*

**chemistry**

Mass of Aspirin tablet: 0.357 g 10 mL of 1 M NaOH was added to the aspirin tablet in a 125 mL Erlenmeyer flask and heated to a boil. The solution was transferred to a 100 mL volumetric flask and the flask was filled to the mark with DI water. 1 mL of the solution was pipetted ...
*January 31, 2010*

**math**

never mind got it... Thanks
*January 28, 2010*

**math**

what are the subsets of S?
*January 28, 2010*

**math**

WHAT IS A 100-GON
*January 23, 2010*

**Physics**

So, V^2=g*L V=sqrt 9.8 * 2.17
*January 11, 2010*

**AP Physics B (Heat Engines)**

Do not multiply the percentages you calculated by .65, because you already multiplied it to get 17% and 14.6% :)
*December 16, 2009*

**math**

A pair of dice are rolled and the sum on their upturned faces is recorded. What is the probability that the sum showing is 8, given that one die is showing a 5?
*December 16, 2009*

**algebra**

y-9>-16 the solutions is y> i dont get this?
*November 1, 2009*

**Chemistry**

What volume of 0.178 solution is necessary to completely react with 92.3 of 0.106?
*October 8, 2009*

**3rd gr social studie**

He know how to do the work it just when the teacher is explaning the lesson is the problem.
*September 29, 2009*

**3rd grade**

my need help with 3rd grde social studies
*September 29, 2009*

**Algebra 1**

y=-2x + 4
*September 24, 2009*

**Economics**

The statement, “A manager should never hire another worker if the new person causes diminishing returns.” is false. A manger should hire what is needed as long as the point of negative marginal product is not reached. Going beyond the point of diminishing returns is...
*July 6, 2009*

**statistics**

The sum of the residuals is __________. Is it 0?
*July 2, 2009*

**AP Chemistry**

I need help with figuring out an appropriate way to do this sort of lab: how to determine an unknown compound. With this one however, the teacher just gave us a white powdered compound - and asks us to figure out how to identify it using ANY lab procedures. He gave hints that ...
*May 18, 2009*

**Stats**

In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the mean crash damages the same for...
*August 4, 2008*

**ART**

HENRY MOORE
*July 16, 2008*

**statistics**

In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the mean crash damages the same for...
*June 19, 2008*

**Chemistry**

hi i was just wondering what the solution would be to: AgNO3 + Na2S2O3 + sunlight (light enegy) ?
*May 27, 2008*

**science**

how much water is there in a can of coke
*May 26, 2008*

**science**

are the ingrdients in coke soluble or unsoluble
*May 26, 2008*

**science**

why does warm coke go flat
*May 26, 2008*

**science**

why do bubbles form in coke when poured into glass
*May 26, 2008*

**science**

when a coke can is frozen it explodes, why
*May 26, 2008*

**science**

why do coke cans get moisture on the outside when they are taken out of the fridge
*May 26, 2008*

**math**

a plane with an airspeed of 192mi/h is headed on a bearing of 121 degrees. a north wind is blowing (from north to south) at 15.9 mi/h . find the ground speed and the actual bearing of plane.
*May 24, 2008*

**MATH**

a traingle has an area 48 square cm and its shorter sides have lengths 9cm and 12cm. find the lagest angle of the traingle.
*May 24, 2008*

**MATH**

The Captain of a freighter 8km fromthe nearer of two unloading docks on the shore finds that the angle between the lines of sight to the docks is 35 degrees. if the docks are 10km apart, how far is the tanker from the farther dock? The Captain of a freighter 8km fromthe nearer...
*May 24, 2008*

**MATH**

Two Planes leave an airport at the same time, one flying 300km/h and the other at 420km/h The angle between their flight paths is 75 degrees after three hours, how fart apart are they? answer: so it would be c^2=a^2+b^2-2ab cos C 900^2+1260^2-2(900)(1260)(cos75) c^2=33542.9 c=...
*May 24, 2008*

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