Wednesday

August 27, 2014

August 27, 2014

Total # Posts: 2,372

**physics **

A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2. what is the mass in kg?
*June 2, 2010*

**physical science **

A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2
*June 2, 2010*

**chemistry**

Why is it important for a company manufacturing vinegar to regularly check the molarity of its product?
*June 1, 2010*

**college statistics**

Three members of a club will be selected to serve as officers. The first person selected will be president, the second person will be vice-president and the third will be secretary/treasurer. How many ways can these officers be selected if there are 30 club members?
*May 30, 2010*

**6th grade writting**

how many paragraphs is an essay?
*May 29, 2010*

**chem**

1 molar solution of Pb(NO3)2 you want 3mL of 0.5 Molar Pb(NO3)2 how much of the one molar solution do you mix with H2O to reach your goal
*May 27, 2010*

**Statistics - Urgent**

If there were two groups: One group who saw a yardstick before estimating its length Another group who did not see a yardstick before estimating its length Would this be a matched pairs design (a person from both groups estimates at the same time, then the next pair, etc.)? Or...
*May 26, 2010*

**Statistics - Data Collection**

Specifically for a two sample t test on difference in means with a matched-pairs design. What would the step-by-step process be for a simple random sample from the cafeteria population?
*May 26, 2010*

**Statistics - Data Collection**

If you were in a cafeteria full of students and you wanted to randomly divide 10 students into group A and 10 students into group B, what would be the least biased way to do it?
*May 26, 2010*

**science**

How can an animals structure help survive in different environments? give three examples
*May 25, 2010*

**statistics**

To reduce theft, the Meredeth Company screens all its employees with a lie detector test that is known to be correct 90 percent of the time (for both guilty and innocent subjects). George Meredeth decides to fire all employees who fail the test. Suppose 5 percent of the ...
*May 23, 2010*

**math**

No One was Not taking any of these,Because 33+13=46
*May 21, 2010*

**posting box**

That might be from loading and You may just not have the settings it needs
*May 20, 2010*

**social studies **

Republicans
*May 19, 2010*

**all subjects**

Yes I love it!!It gives me a bunch of help and it is VERY fun I spend HOURS o this.And Ms.Sue Is ALOT of help,She has Complete Answers And Gives you Websites if she has a good 1!Thanks A BUNCH Jiskha I LOVE this!
*May 19, 2010*

**True False**

False It should be "Many students anticipate spring break,But Luise looks forward to Winter vacation more."
*May 19, 2010*

**QUICK! BE THE FOURTH PERSON TO CLICK TO WIN BIG $!**

This was a HUGE waste of time
*May 18, 2010*

**Africa**

Gorillas are from there!!!! :)
*May 16, 2010*

**english**

OF COURSE!!!!!!
*May 16, 2010*

**math**

how many ways can 9 cars be parked in a row of 9 parking spaces?
*May 16, 2010*

**chemistry**

thank you very much DrBob!!I really appreciate this
*May 15, 2010*

**chemistry**

how many grams of oxygen is required to produce 2.0 kg of water??
*May 15, 2010*

**science /chem**

yup that's right
*May 12, 2010*

**algebra**

What should you say if you see a tall wrought-iron tower in paris, france?
*May 12, 2010*

**5th grade**

I am A 5th grader To.Blameless,Exculpated,and Simply Not Guilty.
*May 12, 2010*

**calc Urgent please**

idk
*May 11, 2010*

**Data Management**

Oh also n is the total number of tickets which in this case is 1000000
*May 10, 2010*

**Data Management**

P(x) of 1000000 is 1/1000000 P(x) of 50000 prize is 2/1000000 P(x) of 1000 prize ia 10/1000000 P(x) of 50 prize is 200/1000000 P(x)=p Find E(x) for each one E(x)= n.p Then add all E(x) values to find the expected value of all prizes for one ticket Finally, that that total and ...
*May 10, 2010*

**english**

true but dount
*May 10, 2010*

**Social Studies**

What large city is northeast of New York City?
*May 7, 2010*

**math**

12
*May 6, 2010*

**chemistry**

A solution is prepared by mixing 0.0433 mol CH2Cl2 and 0.0623 mol CH2Br2 at 25°C. Assuming the solution is ideal, calculate the composition of the vapor (in terms of mole fractions) at 25°C. At 25°C, the vapor pressures of pure CH2Cl2 and pure CH2Br2 are 133 and 11...
*May 4, 2010*

**chemistry**

Glycerin (C3H8O3) is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 180. g of glycerin to 321 mL of H2O at 39.8°C? The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is 0.992 g/cm3.
*May 4, 2010*

**chemistry**

Calculate the molarity and mole fraction of a 2.35 m solution of acetone (CH3COCH3) dissolved in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the final volume equals the sum of the volumes of acetone and ethanol.
*May 4, 2010*

**chemistry**

Calculate the sodium ion concentration when 55.0 mL of 4.5 M sodium carbonate is added to 15.0 mL of 3.0 M sodium bicarbonate.
*May 4, 2010*

**chemistry**

What must be the pH of a solution that is 0.067 M Fe3+ to just cause Fe(OH)3(s) to precipitate?
*April 28, 2010*

**math**

prove the following: given: ABCD is a trapezoid with bases BC and AD to prove: BX • AX = DX • CX X is the intersection of the segment going from BD and AC i need the answer in a two column proof statements Reasons 1. ABCD is a trapezoid with 1. given bases BC and AD ...
*April 28, 2010*

**physics**

In the figure below, a box of Cheerios (mass mC = 0.8 kg) and a box of Wheaties (mass mW = 2.5 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is 2.0 N, and the ...
*April 26, 2010*

**ACCOUNTING**

if a company issued $32,000,000 of 10-year, 12% bonds at an effective interest rate of 13%, receiving cash of $30,237,139 and interest on the bonds is paid semiannually how do you calculate the first semiannual interest payment and the amortization of the bond discount?
*April 26, 2010*

**math**

38 animals
*April 22, 2010*

**physics**

It emits a sound, so the equation is Intensity = Power / 4(pi)r^2 r being the distance, 158 meters.
*April 21, 2010*

**AP Chemistry **

I decided to set up an ICE chart but I am a little confused. This is what I did: CaCl2 + K2SO4 = CaSO4 + 2 KCl I 0.020M 0.20M 0 0 C -X -X +X +2X E 0.020-x 0.20-x 0+x 0+2x Am I right in saying this? Additional information: Ksp= (CaSO4)(KCl)^2 / (CaCl2)(K2SO4) Ksp= 2.4 x 10^ -5
*April 21, 2010*

**AP Chemistry **

100. mL of 0.020 M CaCl2(aq) is added to 200. mL of 0.20 M K2SO4(aq). Calculate the equilibrium concentrations of Ca^2+ (aq) and SO4^2-(aq)
*April 21, 2010*

**Finance**

Suppose you are considering two investments, stock A and stock B. The beta of A is 1.20, and the beta of B is 0.80. Stock A has an expected return of 12% and Treasury Bills are yielding 3%. If the two stocks are fairly prices, what's the expected return on the Market Index...
*April 20, 2010*

**College Chemistry**

If you have the molecular weight of ethanol which is 46.1 and the concentration is 4.0% w/v. What is the molarity
*April 20, 2010*

**physics**

Frank stands at the base of a building. He throws a 0.12kg rock straight up at a speed of 28m/s so that it rises to a maximum height of 12m above the top of the building and then falls straight down on the roof of the building. a) What is the height of the building? b) What is...
*April 18, 2010*

**physics**

A helicopter hovering above a forest fire dumps a large bucket of water. How far does the water fall during the third season?
*April 18, 2010*

**physics**

Does a free falling object have a velocity of zero? If it does then is it zero for the initial velocity or the final velocity?
*April 18, 2010*

**Physics Gr.11**

thanks!
*April 18, 2010*

**science**

does the pumping of a soap dispenser have anything to do with boyles law?
*April 18, 2010*

**math/substituion method**

x+3y=-6 3x+9y=6
*April 17, 2010*

**Langusge Arts**

what are the metaphors in here
*April 14, 2010*

**English**

buhgtuyrvwo6qtp28 qte87p2ety q2hye89ggggggggggggggggggggggggggggggggggggs7yu8oydu8yqo9syvqwhyuivy2qgeuyv7iqwugecuyl wgehjygtw tdgyhbwvg dguywbg sduyqw gt7yqwe utys ugsv asuyw vdb syyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyys7duiw68d6vw6ed
*April 14, 2010*

**trig**

8========)--------
*April 13, 2010*

**Chemistry**

Assuming that sea water is a 3.5 wt % solution of NaCl in water, calculate its osmotic pressure at 20°C. The density of a 3.5% NaCl solution at 20°C is 1.023 g/mL.
*April 13, 2010*

**Chemistry**

How much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 40.67 kJ/mol, the enthalpy of fusion for water is 6.01 kJ/mol, the molar heat capacity of liquid water is 75.4 J/(mol °C), and the molar ...
*April 13, 2010*

**Chemistry**

Calculate the total quantity of heat required to convert 25.0 g of liquid CCl4(l) from 25.0°C to gaseous CCl4 at 76.8°C (the normal boiling point for CCl4)? The specific heat of CCl4(l) is its heat of fusion is and its heat of vaporization is
*April 13, 2010*

**Science**

When 260. mL of 1.50 x 10-4 M hydrochloric acid is added to 125 mL of 1.75 x 10-4 M Mg(OH)2, the resulting solution will be
*April 13, 2010*

**chemistry**

We want to make 100. mL of 1.0 M NaA solution by dissolving solid NaA in water. What mass of solid NaA is needed?
*April 12, 2010*

**9th grade geometry**

take 360 divided by how many slices it was cut into for the arc of each. divide 360 by that number, multiply it by pi, than multiply it by the radius. that'll give you the area of one slice, so all you have to do now is multiply the area of one slice by 3 for all 3 slices...
*April 12, 2010*

**math riddle algebra pizzaz**

living in x aisle
*April 12, 2010*

**geometry**

i have only a measuremment for one side of a triangle need to find the other to to find area how do i do this
*April 12, 2010*

**Calculus**

How did you guys get those formulas I have the same question and I have no idea how to start it
*April 10, 2010*

**phisics**

676
*April 7, 2010*

**chemistry**

Strontium-90 has half-life of 28 years. if a 1.00-mg sample was stored for 112 years. what mass of Sr-90 would remain?
*April 6, 2010*

**MATH**

IS 8 FL OZ ONE CUP
*April 6, 2010*

**accounting**

I am attempting to study for an exam for tomorrow and cannot figure out the equity method entries up to 2006 for this problem, can someone please help! Parent Corporation owns 80% of Subsidiary Corporationâ€™s outstanding common stock that was purchased at book...
*April 5, 2010*

**chem lab (webwork)**

the answer is NOT d!!...i just did it and got it wrong -__-
*April 5, 2010*

**elementary math**

when finding the factors for 841 what is the largest factor you would have to test?
*April 2, 2010*

**algebra**

6 over x to the 10th times x to the 17th over 15
*April 1, 2010*

**algebra**

6 over x to the 10th times x to the 17th over 51
*April 1, 2010*

**science**

The ______ of a transverse wave is the distance between 2 crests or 2 troughs.
*March 31, 2010*

**Geography**

32. Bucharest, Romania 33. Budapest, Hungary
*March 30, 2010*

**Statistics**

How do you calculate the value of z* and t* on the TI-84 and TI-89 (the number used in confidence intervals)?
*March 30, 2010*

**Math**

I know that's the first thing that comes to mind, but my teach said that it can be done. He said that the answer is $0.05, so if someone can work backwards somehow and explain to me how he arrived at that answer I would appreciate it. :)
*March 28, 2010*

**Math**

If a bottle and a stopper cost $1.10. How much does the stopper cost?
*March 28, 2010*

**math**

X= 1
*March 28, 2010*

**reiny**

Where did you get .55? I don't need the slope I don't think. This is a pretty straightforward Q, I don't need to graph it.
*March 28, 2010*

**another word problem!**

iN 1993, THE LIFE EXPECTANCY of males was 68.6 years. In 2000, it was 71.1 years. Let E represent the life expectancy in year t and t represent the number of years since 1993. The linear function E(t) that fits this data is: E(t)=_t + _ (round to the nearest tenth) Use the ...
*March 28, 2010*

**please help! Examples in book are different!**

train A and b are traveling in the same direction on parallel tracks. Train A is traveling at 40 mph, and B is at 60 mph. Train A passes the station at 12:25 am, and train b passes the station at 12:40 am, what time will train b catch up to train A?
*March 28, 2010*

**word problem**

train A and b are traveling in the same direction on parallel tracks. Train A is traveling at 40 mph, and B is at 60 mph. Train A passes the station at 12:25 am, and train b passes the station at 12:40 am, what time will train b catch up to train A?
*March 28, 2010*

**math**

I need help! Solve by hte elimination method: 7r-9s=-12 9r+7s=96 When I do this, I get a crazy fraction, and I know the answer is a point. (r,s) But what I'm getting is ridiculous. I got -564/130=s! That has to be totally wrong!
*March 28, 2010*

**math**

how do I solve this? I know it's common math, but I cannot remember how! -4x> 1/11 I think I multiply both sides by 11, but..... I can't remember how!
*March 28, 2010*

**math**

Help! These are fractions, so bear with me: -5/8 x= -9/10 Solve with the multiplicaation principle. How do I do this? The fractions throw me off every time!!!
*March 28, 2010*

**math substitution method**

I know this! Put it in for x. So 7(28-6y) +5y=-26 use that to get y, then plug your answer for y into one of the equations to get x
*March 28, 2010*

**math**

Help! These are fractions, so bear with me: -5/8 x= -9/10 Solve with the multiplicaation principle. How do I do this? The fractions throw me off every time!!!
*March 28, 2010*

**algebra/common math**

how do I solve this? I know it's common math, but I cannot remember how! -4x> 1/11 I think I multiply both sides by 11, but..... I can't remember how!
*March 28, 2010*

**algebra**

I need help! Solve by hte elimination method: 7r-9s=-12 9r+7s=96 When I do this, I get a crazy fraction, and I know the answer is a point. (r,s) But what I'm getting is ridiculous. I got -564/130=s! That has to be totally wrong!
*March 28, 2010*

**3rd grade**

Unscramble cioponam
*March 23, 2010*

**6th grade - English**

what is the antonym for ndrvr
*March 22, 2010*

**MATH - Can someone please help!**

What is the solution of the interval notion? x less than 6 and x greater than -3
*March 21, 2010*

**algebra**

How do I solve this with the elimination method? 5x-10y=4 5x-10y=5 I need x=, and y= to get an ordered pair, but every time I mult. by a neg, everything goes away instead of just one variable! please help!
*March 21, 2010*

**chemistry**

At 300.K and 1.00 atm, assume that 25 mL of NO gas reacts with 22 mL of oxygen gas and excess water to produce nitric acid according to the following equation: O (g) H O(l) 2 HNO (g) 2 2NO(g) 3 + 2 + 2 ⎯⎯→ 3 . If all of the nitric acid produced by this ...
*March 21, 2010*

**Math**

What is the solution of the interval notion? x less than 6 and x greater than -3
*March 21, 2010*

**algebra**

how do I break this down? 4x-7 <-4 over 6 the 4x-7 is all over 6 (like a fraction) I thought I just multiply by 6 to get rid of the fraction?
*March 20, 2010*

**algebra**

YOU ARE RETART JEWBU
*March 17, 2010*

**6th grade math**

answear is x>54(11)+ 20 what is x,=81
*March 16, 2010*

**chemistry**

What are the probably products of... a) an aqueous solution of two ionic compounds b) a single compound c) two elements d) oxygen and a compound of carbon and hydrogen ?
*March 16, 2010*

**Environmental Science**

very helpful :)
*March 15, 2010*

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