Friday

December 9, 2016
Total # Posts: 118

**Chemistry**

Table sugar consists mostly of sucrose, C12H22O11. The standard enthalpy of combustion for sucrose is the standard state delta H for the reaction: C12H22O11 + 12 O 2 ---> 12 CO2 + 11 H2O Calculate this standard state delta H. Give answer in units of kJ to five significant ...

*December 3, 2016*

**Chemistry**

Mg + 2HCI --> MgCl2 + H2 0.158 g of Mg metal is combined with an excess of HCl to make 100.0 ml of solution in a coffee up calorimeter. The reaction rises from 25.60 C to 32.80 C. Determine delta H for the reaction of one mole of Mg. Units in kJ. 3 significant figures.

*December 3, 2016*

**staistics**

7) A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assume that a random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?

*November 19, 2016*

**7TH GRADE mATH**

SIMPLE INTEREST EARNED TO THE NEAREST CENT FOR EACH PRINCIPAL, INTEREST RATE, AND TIME. 1500,4.25%, 4 YEARS

*November 1, 2016*

**Math**

One positive number is two more than a second number their product is 168

*October 31, 2016*

**physics**

An object experiences an impulse, moves and attains a momentum of 100 kg·m/sec. If its mass is 50 kg, what would its velocity be?

*June 23, 2016*

**Calculus**

Find the area bounded by the parabola 8+2y-y^2 and the lines y=-1 y=3

*June 2, 2016*

**physics**

A race car accelerates from 50 m/s to 75 m/s over a distance of 400 m. What is the race car’s acceleration?

*May 18, 2016*

**Math Help Please!**

Since you have two equations that equal y, you can set them equal to themselves, so 3x+20=x^2+2x If you move those all over to one side, you get that x^2-x-20=0. From there you can factor out into two parts, (x-5)(x+4)=0. So for this set of equations you can know that the ...

*April 18, 2016*

**Physics**

Just use the equation W=F*X since it is a flat surface. There is no friction that would counteract and make this more complex. The only forces acting on the block would be the tension. In short, the work would be 300N*m or 300J, assuming that the problem is as simple as ...

*March 20, 2016*

**Business**

Job Rotation (I guess, I'm not much of a business expert yet...)

*March 19, 2016*

**Stupid Math School Math**

HALP ME PLZZZZZZZZ I NEED THIS BY SUNDAY 1:30 EST

*March 19, 2016*

**Stupid Math School Math**

Two cars are 750 miles apart and start moving towards each other. One car moves with the average speed of 40 mph and the other is 10 mph faster. When will the cars meet if they started to move at 11:00 a.m.?

*March 19, 2016*

**math**

Finn = 9 Pari = 18 9+9=18 18 / 2 = 9

*March 19, 2016*

**asc**

typo: more is spelled as 'ore'

*March 17, 2016*

**Math**

Are you sure?

*February 24, 2016*

**Math**

5/a=6/7 what is the A

*February 24, 2016*

**Math**

Waddell mountains have a species of birds that hatches two birds each week. Currently there are 7 birds. Write a function represent this graph?

*February 7, 2016*

**geometry**

ABCD is a rectangle with non-congruent adjacent sides.

*June 8, 2015*

**math**

A pedestal in a craft store is in the shape of a triangular prism. The bases are right triangles with side lengths of 12 centimeters, 16 centimeters, and 20 centimeters. The store owner wraps a piece of rectangular cloth around the pedestal, but does not cover the identical ...

*April 23, 2015*

**Physics**

6.89 seconds?

*March 26, 2015*

**Pre-Calc **

The average age of the groom at a first marriage for a given age of the bride can be approximated by the model y=-.107x^2+5.68x-48.5, 20<=x<=25. Where y is the age of the groom and x is the age of the bride. For what age of the bride is the average age of the groom 26?

*January 20, 2015*

**math**

A scientist is mixing a chemical solution for an experiment. The solution contains 3/8oz of chemical and 1/6 ounce saline solution. What is the rate of chemical to saline?

*December 18, 2014*

**Science**

How many grams of CH3SH must be added to water to prepare 410mL of a solution that is 2.5 M CH3SH?

*November 4, 2014*

**Science**

what is the concentration (M) of a MgCl2 solution prepared by dissolving 7.2 g of MgCl2 in sufficient water to give 362 mL of solution?

*November 4, 2014*

**Science**

How many grams of H2SO4 are in 125 mL of a 3.00 M solution of H2SO4?

*November 4, 2014*

**MATH HW HELP!!**

Mike Gioulis would like to have $25,000 in 4 years to pay off a balloon payment on his business mortgage. His money market account is paying 1.825% compounded daily. Disregarding leap years, how much money must Mike put in his account now to achieve his goal? Round to the ...

*May 20, 2014*

**physics**

A jogger with a mass of 66.0 kg reaches the top of a staircase in 44.0 s. If the distance from the bottom to the top of the staircase is 14.0 m, how much power will the jogger create in climbing the stairs?

*April 3, 2014*

**Spanish Help please**

These look correct to me

*April 1, 2014*

**Please help me ASAP!!!**

Three uniform spheres are fixed at the positions shown in the diagram. Assume they are completely isolated and there are no other masses nearby. (a) What is the magnitude of the force on a 0.20 kg particle placed at the origin (Point P)? What is the direction of this force? (b...

*March 31, 2014*

**math**

Could you recheck this question? It seems there isn't any information as to if there is a slope, or not. Who's to say the amount of bacteria won't double, triple, or quintuple over a minute's time? I only picked up that at 0 min. There are 3000 of the bacteria ...

*March 24, 2014*

**World History**

Lol I guess so

*March 24, 2014*

**World History**

By rallying commoners that were not French to serve their nation-states(?)

*March 24, 2014*

**World History**

Could someone explain how nationalism contributed to Napoleon's defeat?

*March 24, 2014*

**math**

how do i solve if it took 1.5 qt of paint to paint a wall 8 ft by 15 ft how many qts will it need to paint a wall that is 10 ft by 24ft.

*February 11, 2014*

**physics**

Can you retype the equation please? I would love to help.

*January 20, 2014*

**english**

yes.

*January 20, 2014*

**english**

I already have it up, its about an essay, its right below this one in english.

*January 20, 2014*

**english**

No prob. You should help me with my question ;)

*January 20, 2014*

**english**

I agree with Naah, the other ones have proof, whereas, D is an opinion, because there is not really a way to "prove" it.

*January 20, 2014*

**english**

i would say D. The other ones have statistical evidence.

*January 20, 2014*

**English**

This is exactly what I needed. :)

*January 20, 2014*

**English**

Thank you very much.

*January 20, 2014*

**English**

Please be as critical as possible

*January 20, 2014*

**English**

Yes, here it is, I mostly need peer editing . Guy Montag lives a dystopian society, with a distant wife. He had never done anything extraordinary, however; he suddenly became a grand book thief. Montag soon encountered a very different girl, by the name of Clarisse, after that...

*January 20, 2014*

**English**

I don't have a thesis yet, however I need to show how Fahrenheit 451 shows the hero's journey.

*January 20, 2014*

**English**

essay outline about the hero;s journey in fahrenheit 451?

*January 20, 2014*

**Social**

Revenge-support groups? More communication? Protection-more qualified adults/police to help keep the peace/ Attention Seeking...All I can think of is support groups yet again, or psychiatrists

*January 20, 2014*

**Pre-Calculus**

noooooooooo

*October 19, 2013*

**math**

For pooled sp = (n1-1)s1^2 + (n2-1)s2^2 /(n1+n2-2) Sqrt(29841/41 ) = 26.978 Confidence interval The degrees of freedom of t is n1+ n2 -2 xbar1-xbar2 -+ta/2 *sp*sqrt(1/n1 +1/n2)) (39-26)-+ 2.02* 26.978sqrt(1/27+ 1/16)) (-4.19, 30.19)

*June 26, 2013*

**math**

xbar1 - xbar2 -+ ta/2 * sqrt(s1^2/n2 + s2^2/n2) 13 -+ 2.02* sqrt(21^2/27 + 35^2 /16)) (-6.47, 32.47)

*June 26, 2013*

**Biochem**

In yeast, ethanol is produced from glucose under anaerobic conditions. What is the maximum amount of ethanol (in millimoles) that could theoretically be produced under the following conditions? A cell-free yeast extract is placed in a solution that contains 3.50 × 102 ...

*April 3, 2013*

**ECONOMICS**

0.8333

*March 1, 2013*

**physics**

The sequence would be 2,3,1. Looking at a specific variable, lets say the velocity of the larger mass. For the first kind of catch, the velocity of the medicine ball is the same, so it should be the hardest as there is no compensation for difficulty due to the increase in mass...

*October 15, 2012*

**math**

Give two equivalent fractions for the smallest amount of problems you need to complete correctly on a homework assignment to get 85%

*August 27, 2012*

**Operation decimals **

2 - 0.43

*June 17, 2012*

**math**

HE WENT DATAWAY

*June 14, 2012*

**math**

what is the value of y when x=2 in the equation y=-4x - 5?

*May 9, 2012*

**anthrpology**

a state of balance with nature

*April 23, 2012*

**physics**

a motorbike has a mass of 300kg, and is being ridden along a straight road. The rider sees a traffic queue ahead. He applies the brakes and reduces the speed of the motorbike from 18m/s to 3 m/s. Use this equation to calculate the kinetic energy lost by the motorbike. Kinetic ...

*February 15, 2012*

**Math**

Every day Sally saved a penny, a dime, and a quarter. What is the least number of days required for her to save an amount equivalent to an integral number of dollars?

*January 29, 2012*

**physics**

if a car generates 18 hp when traveling at a steady 88 km/h, what must be the average force exerted on the car due to friction and air resistance

*December 9, 2011*

**Chemistry**

A mettallurgist decided to make a special alloy. He melted 30 grams of Au(Gold) with 30 grams of Pb. This melting process resulted to 42 grams of an Au-Pb alloy and some leftover Pb. This scientist wanted to make 420 grams of this alloy with no leftovers of any reactants. how ...

*October 31, 2011*

**Management**

Can someone help me with these 2 questions from principles of management.thank you 1) Using the comprehensive approach, tell what steps you would take to manage a change. For each step, give specific examples of actions you would take at that step. 2) Discuss social ...

*October 18, 2011*

**calculus**

Melting Snowball: A spherical snowball melts at a rate proportional to its surface area. Show that the rate of change of the radius is constant. (Hint: Surface Area =4(pi)r^2)

*October 18, 2011*

**Management**

Can anyone please help me with these questions for the final exam? 1) It is April, and you are the plant manager at a unionized parts warehouse. You have been asked by top management to inform the line workers that the plant will be shut down during December due to excess ...

*October 16, 2011*

**Chemistry**

how much 2% solution do I need to convert 20 ml of 5% solution to a 3% solution?

*October 12, 2011*

**physics**

Given that the side of the square has a length b-a, find the area of one of the four triangles and the area of the small inner square. Give the area of one of the triangles followed by the area of the small inner square separated by a comma. Express your answers in terms of ...

*September 2, 2011*

**physics**

Accuracy is how close a measured value is to the actual (true) value. Precision is how close the measured values are to each other.

*August 5, 2011*

**Physics**

Accuracy is how close a measured value is to the actual (true) value. Precision is how close the measured values are to each other. Say you are shooting at a Target. You shoot five times, and they all hit the bulls eye near each other; this is accurate and precise, because ...

*August 5, 2011*

**Physics**

Accuracy is how close a measured value is to the actual (true) value. Precision is how close the measured values are to each other. but how do they relate to measurement?

*August 5, 2011*

**Physics**

Measurements can be described as accurate and/or precise. Define accuracy and precision and give examples of how those terms could be used to describe a measurement.

*August 5, 2011*

**Math**

A pyramid is inscribed in a cube whose volume is 52pi cm^3. The volume of a sphere is equal tpo the volume of this pyramid. Find the volume of a second cube whose edge is equal to the radius of the sphere.

*May 30, 2011*

**acrostic poem**

Math goals

*May 28, 2011*

**Math**

How many digits are in the smallest positive number divisible by th first ten numbers in the Fibonacci sequence?

*May 27, 2011*

**statistics**

Let U = {5, 10, 15, 20, 25, 30, 35, 40} A = {5, 10, 15, 20} B = {25, 30, 35, 40} C = {10, 20, 30, 40}. Find A ⋂ B.

*May 15, 2011*

**calculus**

find the volume of the solid whose cross section is perpendicular to the x axis from isosceles right triangles and has a leg that run from the lines y=-x to the line y=.5x

*April 11, 2011*

**macroeconomics**

Calculate the total change in aggregate demand because of an initial $300 decrease in investment spending, given that C = 150 + 0.50YD. $1,200 decrease $300 decrease $150 decrease $600 decrease i think it is 300 but i think i am wrong

*April 9, 2011*

**Medical Coding, Part 1**

10. Which of the following codes is used for the diagnosis "closed dislocation of the sternum"? A.839.61 C. 839.71 B.839.8 D. 839.9 11. A 50-year-old new female patient has had a sore throat and head congestion for five days. The physician performs an expanded ...

*February 23, 2011*

**psy**

ecological

*February 19, 2011*

**chemistry**

a sample of oxygen gas has a volume of 2730 cm3 at 21.0 C. At what temperature would gas have a volume at 4000 cm3?

*January 7, 2011*

**english**

needing to write 5 sentences that are no repeat sentences about New Years resolution and you can not repeat any words already used in any of the other sentences

*January 5, 2011*

**College Algebra**

Solve the system: x + y + z = -1 2x + 2y + 5z = 1 5x + 2y + 3z = 8 what is the value of x in the solution?

*December 11, 2010*

**math**

A shirt regularly cost $38 but it is on sale for 40% off. What is the sale price of the shirt?

*November 28, 2010*

**pre calculus**

simplify sin(2 pi/3+x)

*November 18, 2010*

**math**

I have the first few words:did you hear about the water polo player who... whats the rest?

*November 16, 2010*

**1st grade**

I drove past a sandwich shop.

*November 8, 2010*

**Physics**

A stone is dropped into a deep well and is heard to hit the water 2.95 s after being dropped. Determine the depth of the well.

*October 8, 2010*

**math/accuplacer**

The principals is buying pizza for the school-wide pizza party. If there are 1852 students in the school & each student in the school & each student can eat approximately 3 slices of pizza, estimate the 3 of slices the students will eat in total.

*March 30, 2010*

**chemistry**

Which of the following is the formation reaction for CaO(s) ? A. CaO(s) Ca(s) + 21O2(g) B. Ca2+(aq) + O2–(aq) CaO(s) C. Ca(s) + 21O2(g) CaO(s). D. 2 Ca(s) + O2(g) 2CaO(s) E. 2 CaO(s) 2 Ca(s) + O2(g)

*February 22, 2010*

**Chemistry**

When 0.655 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 107C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not ...

*February 22, 2010*

**Chemistry**

When 0.945 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 387C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not round...

*February 22, 2010*

**Science**

Also that the gas giants are much further away from the sun. If you look at other solar systems, some gas giants are close to their star and don't have many moons.

*February 16, 2010*

**Pre-Algebra**

Josh is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges and allows unlimited mileage. Company B has an initial fee of and charges an additional for every mile driven. For what mileages will ...

*May 1, 2009*

**Chemistry Lab+Help**

what is the structural formula for these two esters C3H6 02 and what are their names

*March 22, 2009*

**English**

ok thanks :)

*February 1, 2009*

**English**

i mean other than make...

*February 1, 2009*