Friday

April 18, 2014

April 18, 2014

Total # Posts: 90

**Chemistry**

Calculate the heat in kilojoules needed to vaporize 8.00kg of water at 100∘C.

**Math**

Using continuous compounding. A 13,000 deposit in an account with APR of 4.5 percent is. The balance in the account after 1 year is what.

**math theory**

write a rational and irrational number between 1.12301 and 1.1230101.

**physics**

A railroad car with a mass of 2.35 × 104 kg moving at 3.90 m/s collides and joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.25 m/s. a) What is the final speed of the three joi...

**Chemistry**

What is the freezing point of a soluton is which 10.0 g of naphthalene [C10H8(s)] is dissolved in 50.0 g of benzene [C6H6(l)]? Extra info you might need: benzene= 5.12 degrees C m^-1 Answer should be: -2.46

**Chemistry**

What is the freezing point of a soluton is which 10.0 g of naphthalene [C10H8(s)] is dissolved in 50.0 g of benzene [C6H6(l)]? Extra info you might need: benzene= 5.12 degrees C m^-1 Answer should be: -2.46

**Chemistry**

Nitrocellulose lacquer is used as a protective coating on wood. What mass of nitrocellulose is contained in one gallon (3.8L) of lacquer that is 5.1% nitrocellulose by mass? The density of the lacquer is 0.79 g/mL.

**Math**

I=p*r*t p=600 fv=1200 I=1200-600=600 r=12%=0.12 t=? years t= 600/(600*0.12) t=8.33 years

**Math**

3p=p(1+ 0.14t) divide by p to get 3=1+ 0.14t 0.14t=3-1 t=2/0.14 t=14.286 years

**Chemistry**

The vapor pressure of benzene (C6H6) at 25 degrees C is 95.1 mm Hg. What is the vapor pressure of benzene above a solution in which 5.05 g C6H5COOH (benzoic acid) is dissolved in 25 g C6H6? Answer should be 93.9 mmHg

**Chemistry**

How many milligrams of a mixture containing equal numbers of moles of CH and N2 at 10.0 atm total pressure will dissolve in 1.00 L of water at 20 degrees C? Answer should be 2.1 x 10^2 mg

**Chemistry**

At 25 degrees C and 1 atm gas pressure, the solubility of CO2(g) is 149 mg/100 g water. When air at 25 degrees C and 1 atm is in equilibrium with water, what is the concentration of dissolved CO2, in mg/100 g water? Air contains 0.037 mol % CO2(g). the answer should come out t...

**Physics...**

While following the directions on a treasure map, a pirate walks 23.5 m north, then turns and walks 2.7 m east. What is the magnitude of the single straight-line displacement that the pirate could have taken to reach the treasure? Answer in units of m

**math**

A moose weighs 1,324 pounds.Show this number in three other ways.Label or describe each way.

**Physics**

Suppose the force exerted by the air on one face of a cube is 8820N. Each side of the cube measures 30cm. Calculate the pressure on this face?

**algebra**

Solve the following system of equations for the unknown variables. x + y = 12 x – y = –2 (NOTE: Show answer in the following format (#,#). If not entered in this format, will be scored incorrect.)

**Math**

How do you divide decimals? Ex. 0.05/0.04=?

**physics**

A hydraulic jack is designed so that when the handle is pushed down 1 m, the piston raising the load moves up 0.015 m. IMA= 66.67 AMA= 26.67 Efficiency= 40% At this efficiency, what is the force required to lift a 5000 N weight?

**Art History**

What are the three major forms of printmaking that were developed after the printing press was invented? Name the artist responsible for first creating prints as a new art form

**Physics**

Mike pulls a 4.5 kg sled across level snow with a force of 250 N along a rope that is 35.0° above the horizontal. If the sled moves a distance of 63.8 m, how much work does Mike do?

**math**

If the inputs are 1 to 8,3 to 10, 5 to 12, and 7 to 14 what is the rule?

**Physics Honors**

A lovesick lad wants to throw a bag of candy and love notes into the open window of his girlfriend's bedroom 10 m above. Assuming it just reaches the window, he throws the love gifts at 60° to the ground: a) At what velocity should he throw the bag? b) How far from the...

**Physics Honors**

A cannon fires a cannonball 500 m downrange when sest at a 45° angle. At what velocity does the cannonball leave the cannon?

**Physics Honors**

A punter in a football game kicks a ball from the goal line at 60° from the horizontal at 25 m/s. How far down field does the ball land?

**Physics Honors**

A punter in a football game kicks a ball from the goal line at 60° from the horizontal at 25 m/s. What is the hang time of the punt?

**Physics Honors**

A golfer is teeing off on a 170 m long par 3 hole. The ball leaves with a velocity of 40 m/s at 50 degrees to the horizontal. Assuming that she hits the ball on a direct path to the hole, how far from the hole will the ball land (no bounces or rolls)?

**Physics Honors**

A baseball player leads off the game and hits a long home run. The ball leaves the bat at an angle of 30 degrees from the horizontal with a velocity of 40 m/s. How far will it travel in the air?

**Math - 5th grade**

I have to find the function rule y = ? for the following table. x y -5 15 3 7 6 4 -2 12

**Business Excel**

I need help with BIS 155 Data Analysis with spreadsheets final exam. Total of 5 essay questions. Must write a total of 250 words per questions. This class is a excel class.

**Physical science**

I need help with the gas laws (Boyle's, Charle's, Gay-Lussac's & the combined gas law). A sample of 6.00 liters of xenon is collected at 960 mm Hg and 50 degrees Celsius. What is the volume at STP?

**spanish**

¡Gracias, Senora!--como siempre, usted es muy generosa y amable.

**spanish**

I am hoping that someone who is good at and likes Spanish grammar can check over my "if-then" (subjunctive-conditional) clauses in present and past. I really want to learn this right--I hope I am starting to catch on but need it checked! Hubo una explosión en ...

**Math**

Farmer McDonald has 150 acres of land to put into crops and 8000 dollars to spend planting and raising them. He can plant two crops, which we'll call crop A and crop B. Crop A costs $40/acre to raise and crop B costs $60/acre. He also has time costs to consider: Crop A req...

**Spanish**

This is so wonderful--thank you so much for your generous comments here. It is so helpful to see the tenses as being cued by certain English phrases--and I am so glad to see how you describe #6 in a way I had not encountered and in a way I can process. The subjunctive seems ha...

**Spanish**

Thank you as always for your wonderful help. Yes I think that the English cues would help me very much! For example, I am unsure when, for example, to use subjunctive versus a regular present. Like in #2, I can see now what you mean when I think carefully but when I first look...

**Spanish**

I am working on a short essay and lack confidence in my use of tenses in some sentences. Hopefully someone can check that these are okay or help/suggest how to fix them: 1. Sus colegios estarán aquí despues de ella se haya ido. (Her colleagues will be here after ...

**Spanish**

¡Ah, sí! ¡Gracias--muy amable!

**Spanish**

I am working on the challenge of "if . . . then" statements, and after some work feel I am getting it. But when trying to put in objects with them I feel unsure. I am hoping someone can check these: Le presté a mi hermana dinero. Si no hubiera sabido sus probl...

**Spanish**

¡Muchas gracias! The subjunctive is so difficult but my friends who are native speakers assure me that they don't understand it all perfectly (but of course for them they frequently can sense when it is incorrect/correct). I hope to keep practicing so it will come mo...

**Spanish**

Thank you so much for the positive feedback. Although the most important thing for me is that it can be clearly understood, I also would love to know what you think of the grammar! That is very kind of you to offer.

**Spanish**

I am hoping someone can give me feedback on the following short paragraph on the book "Devil's Highway." I am especially concerned with whether I am using verb tenses correctly. "Devil's Highway" de Luis Alberto Urrea es un libro muy impactante y mu...

**latin**

How would you express "I fight" in Latin?

**latin**

How would you express "without money" in Latin?

**math**

how do do you do that

**math**

i need to know how do you convert 7/8 to a percent

**math**

like a square in the middle and triangles in the side

**math**

i need help by knowing how to find area with 3 shaped in all please help

**Inorganic Chemistry**

How can you figure out the melting point of a molecule such as CF4, KF, MgO, or CH3CN.

**science**

what caused the little puddle of water to appear under the syringe tip?

**8th grade**

Find the number of Calories in a grapefruit and an orange. (1) An orange has 15 more Calories than a grapefruit. (2) Twenty oranges and ten grapefruit have 1800 Calories.

**College- Am. History**

what were the meetings that resulted in the Japanese seeing in the Rolls Royce Ford? I seem not to understand the concept if you can please explain it i will appreciate it.

**Government**

What's segregation?

**Government**

What's segregation?

**College Algebra**

225 cm squared....sorry

**College Algebra**

If the sides of a square are lenthened by 7 cm, the area becomes 222 cm squared. Find the length of a side of the original square.

**Algebra**

If you are looking at a graph of a quadratic equation, how do you determine where the solutions are?

**????**

Did you stop answering questions?

**Algebra**

The speed of train A is 6 mph slower than the speed of train B. Train A travels 200 miles in the same time it takes train B to travel 230 miles. Find the speed of each train?

**Healthcare**

List two pros and cons to the use of these roles in communication for each of the given patient and care giver roles. Mechanics/Machines, Parents/Children, Spiritualists and believers, Providers and consumers, Partners

**geometry**

In the diagram below, the length of the legs AC and BC of right triangle ABC are 6cm and 8cm, respectively.Altitude CD is drawm to the hypotenuse of triangle ABC. what is the lenght of AD to the nearest tenth of a centimeter?

**Language Arts**

Do you have any book reviews opr book reports on Sharon Draper's Darkness Before Dawn?

**Algebra**

How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation? If you replace the equal sign of an equation and put an inequality sign in its place, is there ever a time when the same value will be a ...

**algebra**

What are the roots of the equation x[2]-7x+6=0?

**Math**

I just need to know the formula to solve this problem. I will solve it myself. Problem: A woman has $1.70 in dimes and nickels. She has 5 more dimes than nickels. How many nickels does she have?

**math**

To get an A in history, a student must score an average of 90 on four papers. Scores on the first three papers were 92, 83, and 88. What is the lowest score that a student can make on the last paper and still get an A?

**algebra**

please help me with this 7x-4>but equal to 3

**algebra**

Help me find the axis of symmetry of the given funtion. Y=x2-2x+4

**10th grade**

bob accidently falls out of a helicopter that is traveling horizonally at 160m/s. he plunges into the water below 4s later. assuming there is no air resistance, what is the horizontal distance he travels while falling

**3rd grade**

what is the answer for this like the oppisete of i am

**Chemistry**

Which of the following would be the best solvent for NH3 and why? CH3(CH2)4CH3, CCl4, CH3OH, BrCH2CH2CH3.

**Chemistry**

The boiling point elevation of a solution consisting of 2.92 g of a nonvolatile solute in 82.4 g of benzene is 1.077 oC. What is the molecular weight of the unknown solute?

**Chemistry**

18.6mmHg = X(H2O) * 23.76mmHg X(H2O) = .7838 What is next?

**Chemistry**

The partial pressure of water above a solution of water and a nonvolatile solute at 25oC is 18.6 mm Hg. What is the mole fraction of the solute?

**College Physics**

A paratrooper w/ a fully loaded pack has a mass of 120kg. The force due to air resistance on him when falling w/ an unopened parachute has magnitude F(sub)d = bv^2, where b=0.14 N*s/m^2. a) if he is falling w/ an unopened parachute at 64m/s, whats is the force of air resistanc...

**College Physics**

oh, I understand now why they used those numbers. thank you for all your input on this physics problem, i really appreciate it.

**College Physics**

that didn't work...this is what the homework website told me was the correct way: sqrt(23.9cos200degr - )75.1cos245)^2 + (23.9sin200 - 75.1sin 245)^2 = 60.6 km displacement is tan-1 {(23.9sin 200)-(75.1sin 245)} / {(23.9cos200)- (75.1cos245)} = 81 degrees north of east the...

**College Physics**

Ok, so the 45.1 is total displacement, to get the average km/hour do I take the total displacement (45.1) divided by 50 minutes(total time from A to B)...getting 0.902 km/hour, that doesn't seem correct.

**College Physics**

I got 99, round to 100 for answer as the total displacement at a direction east of south. how do I find the degrees? And for the average velocity I would take 100 divided by 5/6?

**College Physics**

One last physics problem left: Peggy drives from City A to City B in 50 minutes. City A is 75.1km from City O in a direction of 25degrees west of south. City B is 23.9km from City O in a direction of 20degrees south of west. Using City O as your origin, find (a) the displaceme...

**Physics**

thank you SO much!

**Physics**

A scout troop is practicing its orientation skills with a map and compass. First they walk east for 1.2km. Next, they walk 45degrees west of north for 2.7km. In what direction must they walk to go directly back to their starting point? How far will they have to walk?

**Law and Ethics**

This research project is the hardest paper I had to write EVER!!I got all my answers from Wiki but I compared the same answers in the OCR Hipaa summary. Just to make sure that I had the right info. I have put if off for 2 months. Now it's time to get down to business! I...

**English**

Is the answer B. Sue gave Jim a new racket, and he left for the tennis courts?

**English**

Which of the following is a compound sentence? a. Kim will take her daughter, shopping when she learn to behave in public. b. Sue gave Jim a new racket, and he left for the tennis courts. c. Rain and heavy winds caused damage along the coast. d. We found our way home without a...

**Math**

In Rochester parking garage, the levels are 23 feet apart. Each up-ramp to the next level is 114 feet long. Find the measure of the angle of elevation of the incline for each ramp to the nearest tenth of a degree.

**Math**

If the diagonal of a rectangular sundeck makes an angle of 67 degrees with one side of the deck and the length of the diagonal is 24 feet,what are the dimensions, to the nearest foot, of the sundeck?

**Educational Technology Specialist**

How can I get help for Educational Technology Specialist 071

**science**

how are onion cells different from animal cells

**environmental science**

What are some possible effects of climate change resulting from a warmer earth? Possible effects is melting of the polar caps, and flooding on all continents. Also, weather and rainfall patterns will change, so plants and animal will have a hard time finding food. Basically, i...

**norwalk**

historical events of daoism IV History of Daoism Print this section Daoism gradually changed from the philosophy of a small number of sages to a widespread popular religion followed by numerous individual believers and by many groups of monks and lay people. This change occurr...

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