Thursday

July 31, 2014

July 31, 2014

Total # Posts: 1,833

**chemistry**

A 52.3 kg sample of ethanol is needed for a reaction. What volume in liters of ethanol should be used? The density of ethanol is 0.789 g/mL

**statistics**

According to the MIT Airline Data Project, American Airlines controlled 15.5% of the domestic market in 2010. A random sample of 125 domestic passengers that year was selected. Using the normal approximation to the binomial distribution, what is the probability that more than ...

**american government**

With unfunded mandates, the national government?

**american government**

Nullification would have had the effect of returning the nation to the Article of Confederation because?

**american government**

The federal system can be thought of as a marble cake because?

**Math **

What's 25 inch by 12 1/2

**Math**

Your program has a proposed RDT&E-funded project scheduled to start in January 2005 which is expected to take 16 months to complete. The project is expected to cost a total of $16 million (then-year dollars), with cost expected to be incurred at a rate of $1 million per month....

**Physics**

Determine the electric force of a -8.0uc charge would experience when placed 14cm to the left of a 5.0uc charge. got 18N, but I'm not sure if I add the negative to the answer

**Math **

Write the quadratic function in standard form (if necessary) and sketch its graph. Identify the vertex. f(x)=x^2+3x+1/4

**Engineering science**

a 50kg mass is suspended from a spring, causing it to extend by 30mm. calceolate the spring stiffness? The mass is then pulled down a distance of 90mm and released. calculate the frequency of the resulting motion, assuming that this is simple harmonic, calculate the velocity o...

**Finance**

Pretty Lady Cosmetic Products has an average production process time of 40 days. Finished foods are kept on hand for an average of 15 days before they are sold. Accounts receivable are outstanding an average of 35 days, and the firm receives 40 days of credit on its purchases ...

**Physics**

Why is 5*10^3 multiplied by a electron charge?

**correction**

15m/s^2

**Physics**

A small charge that has lost 5.0 X 10^3 electrons and has a mass of 2.0 x 10^-6 kg experiences an acceleration of 15ms^2 when placed at a point P in space. Determine the magnitude and direction of the electric field at P

**math**

sqrt(350^2+400^2)=531.5ft 350+400= 750ft 750-531.5= 218.5ft The trip is 218.5ft shorter if you walk diagonally.

**physics**

sqrt(10^2+10^2)= 14.14m The total displacement is 14m North East

**algebra**

B does not equal the others .04*3000=120 .4*30=12 .4*300=120 .3*400=120

**Physics**

I don't think so, we just started on parallel plates in school and he assigned this question for homework and i have no clue how I would get the final velocity from what was given.

**Physics**

It does not say in the question

**Physics**

Determine the final velocity of an alpha particle (3.2x10^-19) if it is placed in a 7.2x10^6 n/c uniform field. The mass of the alpha particle is 6.64x10^-27

**MGT**

What is a project stakeholder? What are some examples of project stakeholders?

**Science Please Help Me**

R THESE THE RIGHT ANSWERS ?

**chemistry**

Use the systematic treatment of equilibrium to determine the pH and concentrations of species in 1.00 L of solution containing 0.065 mol citric acid (H3A), 0.025 mol 8-hydroxyquinoline (HB), and 0.040 mol KOH. Consider just acid-base chemistry. Ignore ion pairing and activity ...

**Finance**

The Fridge-Air Company's preferred stock pays a dividend of $4.50 per share annually. If the required rate of return on comparable quality preferred stocks is 14 percent, calculate the value of Fridge-Air's preferred stock. What fomula to use?

**Math - Algebra**

Ti'a rectangular gaden has perimeter of 20 meters. She wants its area to be at least 24 square metesr. Find the interval for the possible length of Tia's garden.

**Math**

A glass held 2/5 cup of water, Carlo poured out 3/8 cup, how much is left?

**Chemistry**

Did I ionize Mn2(CO3)3 correctly? Mn2(CO3)3 --> 2Mn^(3+) + 3CO3^(2-)

**Math**

At which points do the lines intersect 2x+y=8 y=-3(x-3) A. 0,8 B. 3,-2 C. 2,4 D. 1,6

**Psycholohy**

One way to measure the validity of a test would be to: you were testing for:

**chemistry**

What volume of ethanol must be diluted with water to prepare 315 mL of 0.620 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL

**math 8th**

Find the circumference of the given circle. Round to the nearest tenth. circle (1 point) 22.0 cm 38.5 cm 11.0 cm 42.8 cm

**math**

If Ѳ is in Quadrant II, and cos Ѳ=-3/4 , find an exact value for sin 2Ѳ.

**algebra**

write in expanded logarithmic form: ln (x y^3 z^7)

**algebra**

Solve: log x + log(x+15)=2

**algebra**

Solve: 7 ^(x+3) =519

**math**

Solve 40e^(0.6x) - 3=237

**Espanol **

Can I get some corrections? 1. ¿Qué estás haciendo? A. Estás sirviendo la cena. B. Estáis leyendo el texto. C. Me estoy levantando. D. No estás haciendo nada. C 2. ¿Entonces estás descansando? A. Sí, estás m...

**math 8th**

Find the measure of ∠s. angle s (1 point) 63° 153° 68° 148°

**Chemistry**

In the spectrum of a specific element, there is a line with a wavelength of 656 nm. Use the Rydberg equation to calculate the value of n for the higher energy Bohr orbit involved in the emission of this light. Assume the value for the lower energy orbit equals 2.

**algebra**

Which box-and-whisker plot shows the scores of ten students on a mathematics exam? 92, 76, 83, 97, 74, 81, 92, 91, 96, 87 (1 point) box and whisker plot box and whisker plot box and whisker plot box and whisker plot

**Algebra**

Rewrite the equation in Ax+By=C form. Use integers for A, B, and C. y-5=-5(x-2)

**english**

Think about the figurative language in this stanza. What is the speaker saying? (1 point) It is hard to find your way at night because it is dark. It is the middle of the night and she is hungry. People find life in being with others. People have to help each other with direct...

**algebra**

Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x-4)(x+2)/(x-3)(x+5) ¡Ü 0

**algebra**

less than or equal to

**algebra**

Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x-4)(x+2)/(x-3)(x+5) ¡Ü0

**algebra**

write a fourth degree polynomial function with real coefficients that has -3,1/5, and 4+i as zeros and the y intercept of (0,5)

**Algebra word problem**

thanks Steve if I was to figure avg cost 3.6-7.2+4.493=.893 times 100 for a total of $89.30 per bike??

**Algebra word problem**

J's bike has determined that when x hundred bikes are built, the average cost per bike is given by C(x)= 0.1x^2-1.2x+4.993, where C(x) is in hundreds of dollars. how many bikes should the shop build to minimize the average cost per bike?

**math**

J's bike has determined that when x hundred bikes are built, the average cost per bike is given by C(x)= 0.1x^2-1.2x+4.993, where C(x) is in hundreds of dollars. how many bikes should the shop build to minimize the average cost per bike?

**georgia history**

hich of the following was a cause of the Great Depression? (Choose all that apply.) (3 points) the Stock Market Crash of 1929 Prohibition Failed crops and drought A lack of demand for goods

**Algebra**

Keiko is a software saleswoman. Let represent her total pay (in dollars). Let represent the number of copies of History is Fun she sells. Suppose that and are related by the equation . Answer the questions below. Note that a change can be an increase or a decrease. For an incr...

**Physics.**

A dike in Holland springs a leak through a hole of area 0.60cm2 at a depth of 1.4m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak? Express your answer to two significant figures and include the appropriate units.

**Physics**

Calculate the average force per nail when Sarah (following figure), who weighs 130 pounds, lies on a bed of nails and is supported by 600 nails. Express your answer using two significant figures.

**Physics.**

The top floor of a building is 40m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.

**Physics.**

Calculate the water pressure at the base of the Hoover Dam. The depth of water behind the dam is 220m . Express your answer to two significant figures and include the appropriate units.

**Physics**

Pressure = weight density × depth Calculate the water pressure at the bottom of the 50-m-high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units

**math**

if one rhombus measures 62 what are the remaining angle

**science**

. An advantage of using an electromagnet, shown on the crane in the image below, instead of a regular magnet to move cars in a junkyard is that an electromagnet can easily be turned on and off. A toy crane with an electromagnet lifting a toy car from a pile of cars (1 point) t...

**science**

an object being pulled to earth by gravity will have the force of air pushing back opposite directions

**language arts**

rewrite each sentence, adding commas where needed. which i was researching skateboards i found an interesting old newspaper story?

**language arts**

Resilient people usually a. complain when they have bad luck b. bring good luck to others c. are able to deal with setback

**math 8th**

1. The following circle graph was published in the Cane County annual report. If there are 1,000 registered voters in Cane County, how many are 35–45 years old? circle graph (1 point) 150 voters

**Physics**

An ice puck of mass m revolves on an icy surface in a circle at speed v at the end of a horizontal string of length L. The tension in the string is T Find the mass of the puck when the length of the string is 2.2m , string tension is 5.0N , and the tangential speed of the puck...

**Physics**

An ice puck of mass m revolves on an icy surface in a circle at speed v at the end of a horizontal string of length L. The tension in the string is T Write the equation for centripetal force, and substitute the values T and L appropriately. Then with a bit of elementary algebr...

**Physics**

The diameter of the base of a tapered drinking cup is 6.6cm . The diameter of its mouth is 9.8cm . The path of the cup curves when you roll it on the top of a table. How much faster does the mouth move than the base? Express your answer using two significant figures.

**Physics**

Calculate the tension in a horizontal string that whirls a 1.9-kg toy in a circle of radius 2.3m when it moves at 2.8m/s on an icy surface. Express your answer to two significant figures and include the appropriate units. 1.9(2.8)^2 .. then divid by 2.3 I got 12.30 N , is this...

**Physics**

A Plane flies north at 215 km/h. A wind from the east blows at 69km/h. What is the plane's new velocity with respect to the ground in standard position

**Chemistry**

Suppose you tried to carry out a double replacement reaction by mixing equal voulumes of a solution that contains dissolved NAOH and a solution that contains dissolved NACL. WHat would you expect to happen when the two solutions were mixed? Expain?

**finance**

Linda Scales is now employed as the managing editor of a well-known business journal. Although she thoroughly enjoys her job and the people she works with, what she would really like to do is open a bookstore of her own. She would like to open her store in about eight years an...

**PHYSC101**

Hormones that regulate the development and functioning of reproductive organs are called ________ hormones.

**Physics**

The coefficient of static friction between the m = 3.20-kg crate and the 35.0° incline of the figure below is 0.260. What minimum force vector F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

**Math**

Need help with this problem: Isolate the variable: -4(2x - 7) = -36

**Math**

Need help with a few: Perform the indicated operation. Write your answer in simplest form: 4|5 / 20|3

**Math**

if i think i got this you would divide 697.50/55= which gives 12.68 an hour

**Biochemstry**

I got to that part where to find the moles of KH2PO4 but why base/ acid would equal the same. this is how i went about it then i got stuck 11.7 g of KH2PO4/136.08g/mol=.085 mol of KH2PO4 then to find M: 500 ml/1000ml=.5L .085/.5=17 M KH2PO4 then o lost myself

**Biochemstry**

1. A buffer was prepared by dissolving 11.7 g of KH2PO4 in 400 mL of water, and with the addition of concentrated solution of KOH the pH was adjusted to 7.10. The volume was then adjusted to 500 mL. What are the [PO43-], [HPO42-], [H2PO41-], and [H3PO4]? Use pKa values of 2.12...

**physics**

A block weighing 71.5 N rests on a plane inclined at 24.1° to the horizontal. The coefficient of the static and kinetic frictions are 0.26 and 0.13 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the block from slipping?...

**Physics**

What would be the answers to A and B?

**Physics **

A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 21.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant acceleration o...

**Science**

Which statement best describes the composition of magma?

**physics**

1 An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take g=10ms−2 15 m above the top of the building 30 m below the top of the building 15 m below the top of the building 30 m above th...

**Physics**

An electron with speed 2.35×107m/s is traveling parallel to a uniform electric field of magnitude 1.16×104N/C . How far will the electron travel before it stops? A=0.135m How much time will elapse before it returns to its starting point? I solved for the time it wo...

**finance**

Mary Watson is 24 years old and single, lives in an apartment, and has no dependents. Last year she earned $45,000 as a sales assistant for Focused Business Analytics: $3,910 of her wages was withheld for federal income taxes. In addition, she had interest income of $142. Est...

**Ghana National Lotto game**

I want to know the nexy ghana lotto drawn

**physics**

If the total positive charge is Q = 1.62×10−6C , what is the magnitude of the electric field caused by this charge at point P, a distance d = 1.53m from the charge? (Figure 1) Enter your answer numerically in newtons per coulomb.

**physics**

What is the magnitude of the electric field a distance 3.0mm from an electron? Express your answer to two significant figures and include the appropriate units

**physics**

Two small charged balls have a repulsive force of 0.20N when they are separated by a distance of 0.90m . The balls are moved closer together, until the repulsive force is 0.58N . How far apart are they now? Express your answer to two significant figures and include the appropr...

**physics**

Three charges are fixed in the x−y plane as follows: 1.5nC at the origin (0, 0); 2.6nC at (0.65m , 0); –1.8nC nC at (0, 1.50m ). Find the force acting on the charge at the origin. Express your answers using two significant figures. Enter the x and y components of th...

**physics**

Three charges are fixed in the x−y plane as follows: 1.7nC at the origin (0, 0); 2.3nC at (0.60m , 0); –2.0nC at (0, 1.20m ). Find the force acting on the negative charge. Express your answer using two significant figures. Enter the x and y components of the force s...

**Physics**

What is the net force exerted by these two charges on a third charge q 3 = 45.0nC placed between q 1 and q 2 at x 3 = -1.145m ? Your answer may be positive or negative, depending on the direction of the force. Express your answer numerically in newtons to three significant fi...

**Physics**

Two Ping-Pong balls each have a mass of 2.6g and carry a net charge of 0.500ìC . One ball is held fixed. At what height should the second ball be placed directly above the fixed ball if it is to remain at rest there? Express your answer to two significant figures and in...

**Physics**

A free electron and a free proton are exactly 0.70cm apart. Find the magnitude of the acceleration of the proton. Express your answer with the appropriate units. Find the direction of the acceleration of the proton. Find the magnitude of the acceleration of the electron. Expre...

**Physics**

Two small spheres spaced 20.0 centimeters apart have equal charge. How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57×10 −21 newtons?

**Physics**

How much charge is contained in 9kg of protons? Express your answer to two significant figures and include the appropriate units.

**Physics**

How much charge is contained in 9kg of electrons? Express your answer to two significant figures and include the appropriate units.

**Math**

Three out of 200 machine parts were found to be defective. About how many parts would be expected to be defective out of 2500 parts?

**Math**

Three out of 200 machine parts were found to be defective. About how many parts would be expected to be defective out of 2500 parts?

**math**

The large container has 13.5 liters of milk. Chen wants to fill as many 3/4 liter containers as possible with this milk. How many containers will he be able to fill?

**Spanish**

I posted this yesterday and didn't get help. Now it is buried on the 3rd page. I am posting again. I hope that is ok. Are these correct? Complete the following statements with the correct form of the verb in parentheses. Some will be conjugated, while others will be left i...

**Spanish 1**

Thank you

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