Wednesday

October 22, 2014

October 22, 2014

Total # Posts: 1,076

**AP Chemistry**

Which of the following sets of quantum numbers are allowed for an electron in a hydrogen atom? a)n=3, l=0, ml=0 b)n=4,l=1,ml=-1 c)n=2,l=1,ml=-2
*October 19, 2014*

**Chemistry**

7. The specific heat of wood is 2.03 J/g∙°C. How much heat is needed to convert 550. g of wood at -15.0°C to 10.0°C?
*October 18, 2014*

**Chemistry**

Calculate the number of moles in 8.50x1015 atoms of 4He.
*October 1, 2014*

**Algebra 2**

Thanks I hope it's right
*September 24, 2014*

**Algebra 2**

Without graphing, identify the verx, axis of symmetry, and transformations from the parent function f(x)= absolute value of x y= 4- absolute value of x-2
*September 24, 2014*

**Calculus**

A sinusoidal section is to be built as part of a roller coaster track. The high point is h=27 m at a horizontal distance d=0 m. It has a low point at h=-3 m at d=50 m. a. Write an equation expressing h in terms of d. b. The lengths of the horizontal timbers used to build the ...
*September 23, 2014*

**Calculus**

Scorpion Gulch and Western Railway are preparing to build a new line through Rolling Mountains. They have hired you to do some calculations for tunnels and bridges needed on the line. You set up a Cartesian coordinate system with its origin at the entrance to the tunnel ...
*September 23, 2014*

**Calculus**

A spacecraft is in an elliptical orbit around the earth. At the time t=0 hours, it is at its apogee (highest point), d=1000 km above the earth's surface. It is at its perigee (lowest point) d=100 km above the surface 50 minutes later. a. Assuming that d varies sinusoidally...
*September 23, 2014*

**Calculus**

At a certain point on the beach, a post sticks out of the sand, its top being 76 cm above the beach. The depth of the water at the post varies sinusoidally with time due to the motion of the tides. The depth d is modeled by the equation d=40+60cos(pi/6(t-2)) where t is the ...
*September 22, 2014*

**Algebra**

Given a point (-2,5determine a point that satisfies the specified symmetry. 1. Origin 2. y-axis 3. x-axis 4. y=x
*September 22, 2014*

**c**

Lets think of the situation. It doesn't tell you how big the pool but you can make up a value. To make it easier use a number that it a multiple of both 4 and 9. In this case it would be 36. Okay say the pools need 36 gallons of water to be full. To find the rate for each ...
*September 16, 2014*

**Physics **

A light bulb is placed 21.7 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, the bulb's image moves 4.60 cm closer to the mirror. Calculate the focal length of the concave mirror.
*September 11, 2014*

**spanish please check!**

Form complete sentences using the information provided. Use the preterite tense of the verb. 1. ir / al / semana / pasada / yo / dentista / la ______________________________________________________________ 2. parque / Pablo / y / correr / perro / su / por / el ...
*August 25, 2014*

**spanish please check!**

Yo fue al dentista la semana pasada Pablo corrio el perro y su por parque ellos leyo periodicos tres cada dia Dona Rita supo la historia de nunca la verdad
*August 25, 2014*

**Spanish**

complete sentences using the information provided. Use the preterite tense of the verb. 1. ir / al / semana / pasada / yo / dentista / la 2. parque / Pablo / y / correr / perro / su / por / el día / leer / ellos / periódicos / tres / cada 4. nunca / la historia...
*August 25, 2014*

**Algebra**

If p(x) is a polynomial and is divided by (x-k) and a remainder is obtained, then that remainder is p(k). If the quadratic p(x)=x^2-3x+5 gives the same remainder when divided by x+k as it does when divided by x-3k find the value of k, k is not equal to 0. This is the answer ...
*August 2, 2014*

**Logarithms**

Ah I get it now thank you! :)
*August 1, 2014*

**Logarithms**

How is log(a/bc) the same as log(a) - log(b) - log(c). Should it not be '+ log (c)'?
*August 1, 2014*

**Spanish use of Imperfect Verbs**

Sorry we are supposed to write about our vacation in an overseas country using past,present and future tenses. As long as we use the Imperfect, Preterite etc. in the right places, it's fine.
*July 26, 2014*

**Spanish use of Imperfect Verbs**

Here's my edited version: ¡Hola mis amigos y familias, me llamo Nick y soy en Miravida Soho en Buenos Aires, la ciudad mayor de la Argentina! Yo he estado en Sudamérica con mi familia pero no he ido nunca a Argentina. Mis compañeros de viajes vieron de ...
*July 26, 2014*

**Spanish use of Imperfect Verbs**

And I would like to give you some advice as 'me gustaría os dar/daros algunos consejos'?
*July 26, 2014*

**Spanish use of Imperfect Verbs**

Thanks for all the help! Just a quick question, would you say "But before I finish" as 'pero antes yo termino' or is there another way?
*July 26, 2014*

**Spanish use of Imperfect Verbs**

Can someone please check if I've used the Imperfect correctly? Thank You :) ¡Ola mis amigos y familias, me llamo Nick y soy en Miravida Soho en Buenos Aires, la ciudad mayor de Argentina! Mis compañeros de viajes y yo pasamos un buen rato hoy. En la mañ...
*July 26, 2014*

**Spanish**

Can someone please just proof-read this? Especially the use of the imperfect and por/para. And don't worry about punctuation :) ¡Ola mis amigos y familias, me llamo Nick y soy en el hotel primero de Buenos Aires, la ciudad mayor de Argentina! Mis compañeros de...
*July 25, 2014*

**Books**

I didn't even think that theme was a sociological one (I'm still only in high school), that theme is just something I thought up of. And yes, my teacher said we are allowed to do fictional texts. In fact, any text at a high enough reading level is appropriate. I don&#...
*July 17, 2014*

**Books**

They're actually visual texts. One is the TV series Marvel's Agents Of Shield and the other one is the movie Dawn of the Planet of the Apes. Our teacher said to have a mixture of both written and visual but I can't think of any that would include that theme.
*July 17, 2014*

**Books**

I'm doing a paper in which I have to write about 4 texts and their connection to a theme. I already have 2 and am looking for 2 more texts. My theme is "How one can never lose his roots, no matter how much influence society has on him", or something similar. ...
*July 17, 2014*

**statistics**

assuming that you wished to have the highest possible score on an exam relative to ht e other scores, would you rather have a score of 70 on a test with a mean of 60 and a standard deviations of 5.2 or a score of 81 on a test with a mean of 79 and a standard deviation of 7.1?
*July 14, 2014*

**mqr/117**

Select the x-coordinate of the vertex of the parabola defined by the function f(x)=5x^2+3x+1
*July 13, 2014*

**Spanish**

Next week I will be in Mendoza, after spending some time in Salta. There I will drink some of their famous wines and see the historical sights. Then I’ll come back home from El Plumerillo Airport! Argentina is a beautiful country, but there can be thefts and hooliganism. ...
*July 7, 2014*

**Spanish**

Sorry for the late reply. This is the stuff I want to talk about. I realize this is a lot so some bits will be cut out. I’m in Salta now on day 5 of my 11-day tour of northern Argentina. I arrived at Rio Gallegos International Airport early Monday morning and got picked ...
*July 7, 2014*

**Spanish**

Thanks but that's just what we need to include. I was wondering if someone could provide me with sentence starters in spanish because we haven't worked on this in class at all, so they would at least give me an idea as to how to write my speech
*July 7, 2014*

**Spanish**

Our spanish class has been given a 1-minute speech to write up over the holidays, but our teacher hasn't provided us with any extra material we can use. I was wondering if you could give me sentence starters etc. to help me work on it. Here is the scenario: (my chosen ...
*July 7, 2014*

**mat/117**

Select the value of x that is the solution for the equation 6/x=7/x+3
*July 6, 2014*

**math/117**

An object 5.7 feet tall casts a shadow that is 17.1 feet long. How long in feet would the shadow be for an object which is 19.5 feet tall?
*July 6, 2014*

**accounting**

The formula for computing additional paid-in capital in excess of par is shares of stock times
*June 21, 2014*

**math!!**

A 9-pack of toy cars costs $8.58. What is the unit price, rounded to the nearest cent?
*June 3, 2014*

**math**

6b/3a+b/a
*May 31, 2014*

**algebra**

A store sells mixtures of almonds and cashews for $6.50 per pound. Peanuts sell for $2.95 per pound and cashews sell for $7.95. How many pounds of each should be used to make 80 pounds of this mixture?
*May 28, 2014*

**Spanish**

Ok thank you :)
*May 23, 2014*

**Spanish**

First of all, thanks so much for all your tips :). Secondly, it's not an essay, it's an oral exam whereby we speak to our partners without any cues or notes. Our teacher told us to revise the preterite, though I don't quite understand the differences between this ...
*May 23, 2014*

**Spanish**

Hi, yes I knew about the accent marks and punctuation, I just didn't have the time to put them in. Sorry, I should have pointed that out earlier. Also, we are supposed to include some small talk, so I was thinking we could talk about the weekend by asking something like &#...
*May 23, 2014*

**Spanish**

Sorry I just realized it's a bit hard to see who's talking.
*May 23, 2014*

**Spanish**

This is my piece that I've been working on with my classmate. It's not finished though, but this will not be the exact conversation we'll be having. The actual assessment is an impromptu style conversation. Hola! Que pasa? Bien. Y tu? Como estas? Bien, bien, muy ...
*May 23, 2014*

**Spanish**

Hi, I would like some tips on what to say when you're talking to a friend about what you're packing & need to buy to go on a trip. This is a conversational piece where it is required that we speak out of context as well (talking about the weekend, activities planned in...
*May 23, 2014*

**Global History**

If you google "Mrs. Sita’s Global Review Packet" it should be the 1st link which is a .pdf. The first page asks about the Neolithic Revolution and Ancient Civilizations.
*May 4, 2014*

**Global History**

No, it doesn't let me post links. Here. Remove the parenthesis from this link: johnbowne(((.)))org/ourpages/auto/2011/1/31/49875088/Global_Regents_Review_Pack__blank_(((.)))pdf
*May 4, 2014*

**Global History**

Replace where it says " DOT " with a period "."
*May 4, 2014*

**Global History**

I need answers to the questions in the link above.
*May 4, 2014*

**Global History**

Yes! I have my facts right! Can you help me find answers then?
*May 4, 2014*

**Global History**

Ms. Sue, this is a website dedicated to helping people cheat on their homework. I know my stuff, but this is too long to get finished in such a short time. I need an answer key.
*May 4, 2014*

**Global History**

Ms. Sue, It's not a test, it's a review packet that was assigned for homework.
*May 4, 2014*

**Global History**

I need answers for "GLOBAL HISTORY REGENTS REVIEW" packet. Associated names are Mr. Moeller and Mrs. Sita. I can't find answers anywhere. The packet can be found blank online here: johnbowne DOT org/ourpages/auto/2011/1/31/49875088/...
*May 4, 2014*

**history**

i need to build a visual for civil war prisoner of war
*May 1, 2014*

**Geometry**

hey im in connections? did u get help im stuck on it
*May 1, 2014*

**NATURE OF ELECTRICITY**

If a charged sphere is brought close to a rod as shown in Figure A, the pairs of pith balls suspended at the ends of the rod will as the figure im reading is showing there is a charged sphere to the left then a induced charged on the rob which the pith balls are hanging from A...
*April 24, 2014*

**Math**

An electronics store usually sells 18 remote control devices per week at a retail price of $12.49. This week the manager put the remotes on sale for a markdown of 20%, and sold 25 of them. How much more revenue was earned this week by having the sale?
*April 23, 2014*

**math!!**

Roy Landers bought 3,000 shares of stock for $59 per share. Six months later he sold the 3,000 shares of stock for $75 per share. If the stockbroker's commission was $975, how much profit did Roy make on the transaction?
*April 23, 2014*

**math**

brain cut an extra large round pizza into 12 pieceas .Seven of then were eaten. WQhay angle measure of pizza is left
*April 22, 2014*

**Math**

Suppose that è is an angle in standard position whose terminal side intersects the unit circle at ((-15/13),(12/13)). Find the exact values of cscè, tanè, and sinè.
*April 17, 2014*

**Math**

The yearly returns of a stock are normally distributed with a mean of 5.1% and standard deviation of 2.7%. Find the probability of a yearly return being greater than 6%.
*April 15, 2014*

**chemistry**

Thank you :)
*April 12, 2014*

**chemistry**

1. Calculate pH of an acetate buffer containing 27.5 mM acetic acid (pKa is 4.74) and 50 mM sodium acetate. When a 30 mM aq solution of sodium acetate was prepared in the lab it had a pH of 8.8. Calculate the amount of acetic acid (in g) to be added to 0.5 L of this sodium ...
*April 12, 2014*

**Math**

5x^4-41x^3-87x^2-31x+10=0
*April 10, 2014*

**physic**

how many kcal of heat must be withdrawn from 4.56 kg of steam at 125 degrees C to change it to ice at -44.5 degrees C???
*April 9, 2014*

**physics**

how many Btu of heat are required to melt 8.35 lb of ice at 32 degrees F
*April 9, 2014*

**Need help on Physics!!**

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*

**Please help me!!!!!**

Some fishing line is made out of nylon with Y =3.0!109Pa and breaking stress 7.7!107 Pa . It is 5.0 m long, you are holding one end, and it hangs down vertically. (a) When a 3.0-kg fish is attached to the bottom end, the fishing line elongates by 1.0 cm. What is its cross ...
*March 31, 2014*

**Another Physics**

At some point in the combustion cycle of an engine, the temperature of a combusted air-fuel mixture is 582 degrees Celsius. Given that the pressure in the mixture is 6.2 bar, determine the density of the mixture (in kilogram per cubic metre).
*March 28, 2014*

**physics**

At some point in the combustion cycle of an engine, the temperature of a combusted air-fuel mixture is 582 degrees Celsius. Given that the pressure in the mixture is 6.2 bar, determine the density of the mixture (in kilogram per cubic metre).
*March 27, 2014*

**physics**

A typical volume of a modern hot air balloon is 2500 cubic metres, and a typical maximum temperature of the hot air is 120 degrees Celsius. Given these figures, and an outside air temperature and density of 15 \(^{\circ}C\) and 1.225 \(kg/m^3\) respectively, compute the ...
*March 27, 2014*

**physics**

Suppose that, on a day when the outside temperature is 15 degrees Celsius, we fill a balloon with pure nitrogen gas, of which the molar mass is 28 grams per mole. Now suppose that we want to heat up a second (equally large) balloon containing air, such that it generates the ...
*March 27, 2014*

**physics**

Some say that the hot air balloons with which the Montgolfier brothers performed their first flight had a volume of 1700 cubic metres and could lift 780 kilograms (that includes the balloon, basket and payload). Assume that the balloon took off on a day when the sea level ...
*March 27, 2014*

**physics**

Thank you steve , please how do you know that each ballon occupies .01617m^3, please if possible give more precisions. I find 0,002746744 which doesn´t make sens to me. How do I make it ? thanks
*March 26, 2014*

**physics**

Thank you steve , please how do you know that each ballon occupies .01617m^3, please if possible give more precisions.
*March 26, 2014*

**physics**

Suppose that a party balloon is spherical, has a radius of 16 centimetres and is filled with helium. Furthermore suppose that we do our experiment under standard atmospheric conditions, when the air density is \(\rho = 1.225 kg/m^3\). How many of these balloons should a 75 ...
*March 26, 2014*

**physics**

Others say that the balloon was 23 metres high and 14 metres wide. Calculate the temperature of the air in the balloon (in degrees Celsius) for this situation as well
*March 26, 2014*

**Math**

Solve the problem. Round to the nearest cent. Joan wants to have $250,000 when she retires in 27 years. How much should she invest annually in her annuity to do this if the interest is 7% compounded annually? A) $1861.10 B) $3356.43 C) $2672.15 D) $937.86
*March 26, 2014*

**math**

2 trains leave the station at 325 one going east at 66 miles per hour the second going west at 82 miles per hour they are 111 miles apart what time is it
*March 25, 2014*

**math, economics**

Consider a market in which consumption of the good being traded generates a positive externality. There are 100 identical consumers, each with a utility function given by 1/2√q+m+√G, where G denotes the total level of consumption in the market. The good is sold by ...
*March 24, 2014*

**Linear Algebra**

Ok. I changed. number two to a number three to b
*March 18, 2014*

**Linear Algebra**

SO is all of them correct?
*March 18, 2014*

**Linear Algebra**

(-5.1)^0 a. 1 << b. 0 c. -5.1 d. -1 3g^-2 b^2 a. 3b^2/g^2 b. 3g^2 b^-2 <<< c. 3gb^-4 d. b^2/3g^2 3/g^-2 h^3 a. 3/g^2 h^3 << b. 3g^2/h^3 c. 6g/h^3 d. 3/gh
*March 18, 2014*

**Math**

In the Math Virtually Everywhere project you completed for this module, you learned all about cell phone plans. The best cell phone plan for a customer can vary based on how much they plan to talk. The plan that is the best deal for one customer may not be the best deal for ...
*March 14, 2014*

**Calculus**

A lighthouse is located on a small island 4 km away from the nearest point P on a straight shoreline and its light makes three revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 km from P? (Round your answer to one decimal place.)
*March 11, 2014*

**Calculus**

Two people start from the same point. One walks east at 5 mi/h and the other walks northeast at 7 mi/h. How fast is the distance between the people changing after 15 minutes? (Round your answer to three decimal places.)
*March 11, 2014*

**Math**

On Monday, Casey ran 5 miles. On Tues, she ran three and three fifths miles. How much further did she run on Mon than Tues? Then, on Wednesday she ran four and one half miles. How much further did she run on Wed than on Tues? Could someone show me how I would figure this out? ...
*March 9, 2014*

**Math**

A to B is 15 miles, B to C is 25, C to F is 21 F to E is 22 E to D is 14, D to B is 11 D to A is 10, A to B is 15 Each town (letters) must be connected to at least one other town. Towns A to F are to be connected. Calculate the minimum length of cable required...
*March 5, 2014*

**NEED HELP ASAP !!**

it would be 27,686 ft in difference
*March 4, 2014*

**math**

an initial population of 865 quail increases at a annual rate of 15%. write an exponential function to model quail population
*February 20, 2014*

**Life Orientation**

*cough* connections *cough* academy *cough,speaks with haste* im reporting you for these MAJOR CHEATS*cough* But really,why you getting all these free answers? You're never gonna succeed in life if you're living off of others smarts. And even when giving others the ...
*February 12, 2014*

**math**

Ruth makes a scale drawing of her room. She uses scale 3/2 in. : 1ft. In the drawing the dimensions are 18 in by 24 in. What are actual dimensions of room.
*February 10, 2014*

**BIOLOGY**

MONERA!!!!
*February 6, 2014*

**Math**

The white house, built 1792, is the oldest federal building in washington DC . The building has undergone extensive remodeling over the years. The main building is 4 stories high and is about 170 ft long by 85 ft wide. If a replica of the white house were made with a length of...
*January 29, 2014*

**Physics**

A stone is thrown directly upward from rest from ground level with initial speed 20.0 m/s; 1.50 s after that, a second stone is thrown directly upward from ground level with initial speed 18.0 m/s. (a) When are the stones at the same height? (b) What are the velocities of the ...
*January 26, 2014*

**Statistic **

Suppose you roll a die 10 times and record the proportion of sixes. Suppose you then conduct a simulation of this experiment, first 100 times, then 1000 times, and draw one histogram of the proportion of sixes found after 100 simulations and a second histogram of the ...
*January 26, 2014*

**math**

a dollar is to a dime as a meter is to a..
*January 22, 2014*

**math**

a dollar is to a dime as a meter is to a..
*January 22, 2014*

**physics**

An animal-rescue plane ﬂying due east at 40 m/s drops a bale of hay from an altitude of 73 m . The acceleration due to gravity is 9.81 m/s. If the bale of hay weighs 177 N , what is the momentum of the bale the moment it strikes the ground? part 2 At what angle of ...
*January 3, 2014*

**physics**

An animal-rescue plane ﬂying due east at 40 m/s drops a bale of hay from an altitude of 73 m . The acceleration due to gravity is 9.81 m/s^2. If the bale of hay weighs 177 N , what is the momentum of the bale the moment it strikes the ground? Please help!
*January 2, 2014*

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