Sunday

April 19, 2015

April 19, 2015

Total # Posts: 312

**Chemistry**

What is the change in entropy when 9.30 mL of liquid benzene (C6H6, d = 0.879 g/mL) is burned in the presence of 37.2 L of oxygen gas, measured at 298 K and 1 atm pressure? 2C6H6(l) + 15O2(g) → 12CO2(g) + 6H2O(l); ∆S° = –437.7 J/K at 298 K
*April 11, 2015*

**chemistry**

Determine the limiting reactant for this reaction if 3.027 grams of Aluminum are reacted with 60.00 mL of a solution that is 6 M KOH. Determine the amount of KAl(SO4)2•12 H2O that can be produced from this reaction. Molar mass Alum = 474 g/mol 2 Al (s) + 2 KOH (aq) + 22 ...
*March 29, 2015*

**Probability **

Consider 10 independent tosses of a biased coin with the probability of Heads at each toss equal to p, where 0<p<1. Given that there were 4 Heads in the first 7 tosses, find the probability that the 2nd Heads occurred at the 4th toss. Give a numerical answer.
*March 3, 2015*

**math**

Michaela makes original stationary to give away as gifts. She likes to put a small bow in the corner of each card. She purchased a piece of ribbon that was 3 1/4 ft long. She can make each bow out of 1/3 ft of ribbon. Which equation would be used to show how many bows she can ...
*January 16, 2015*

**Math**

a pool 5 feet deep with a diameter of 40 feet is filled with water in 50 minutes. how long will it take to fill a pool that is 6 feet deep with a diameter of 36 feet?
*January 8, 2015*

**Calculus**

A 13 foot ladder is leaning against the house when it's base starts to slide away. By the time is 12 feet from the house the base is moving at the rate of 5 ft/sec. 1.How fast is the top of the ladder sliding down the wall at that moment? 2. At what rate is the angle theta...
*October 16, 2014*

**algebra 2**

This is a repost from earlier. I thought it didn't go through so I typed it again.
*August 24, 2014*

**algebra 2**

You have $25 to park your car in a garage in the city. The garage charges $4 for the first hour and $3 for each additional hour. Write an equation & determine the possible number of hours you can park. Help Again!
*August 24, 2014*

**Algebra**

Express as a single logarithm and, if possible, simplify: In x^2 + 3In x-In x^8 Thanks so much
*August 2, 2014*

**calcus**

A car travels 6 miles north and then turns right and travels 8 miles east to reach the garage. What is the straight line distance between the starting point and the garage?
*June 26, 2014*

**Chemistry**

When 100 mL of 0.60 M Na2CO3 (aq) is combined with 500 mL of 0.060 M Ba(NO3)2(aq), a precipitate is observed. What is the equilibrium concentration of Ba2+(aq) at 25°C?Ksp(BaCO3) = 8.1 x 10-9
*April 24, 2014*

**Physics**

A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize traveling east at 10 m/s. The...
*March 8, 2014*

**Social studies**

the 18 amendment, when did it happen
*February 25, 2014*

**Science Help!**

3. Using coal for fuel releases pollution into the atmosphere. Why do people continue to use coal if it causes pollution? A. Using more coal reduces the amount of pollution from using oil B. Using coal is relatively inexpensive. C. Mining coal helps scientist uncover fossils D...
*February 3, 2014*

**Help!!!**

1. Aquaculture is the practice of farming sea organisms as a renewable food source. A. True B. False. 2. Selectively cutting down trees on an area of land can be best described as A. cutting down certain trees while leaving other trees standing B. cutting down all of the trees...
*February 3, 2014*

**Help with science**

1. Aquaculture is the practice of farming sea organisms as a renewable food source. A. True B. False. 2. Selectively cutting down trees on an area of land can be best described as A. cutting down certain trees while leaving other trees standing B. cutting down all of the trees...
*February 3, 2014*

**Science**

Check my answers please!!!
*February 3, 2014*

**Science**

Help
*February 3, 2014*

**Science**

1. Aquaculture is the practice of farming sea organisms as a renewable food source. A. True B. False. 2. Selectively cutting down trees on an area of land can be best described as A. cutting down certain trees while leaving other trees standing B. cutting down all of the trees...
*February 3, 2014*

**Language arts help!!**

more help cantact me at (theminecrafter46931@gmail)saying "conections academy buddy" ok
*November 12, 2013*

**Language arts help!!**

1.c 2.a 3.b 4.c 5.b 6.c 7.b
*November 12, 2013*

**Physics**

A heavy wooden block rests on a flat table and a high-speed bullet is fired horizontally into the block, the bullet stopping in it. How far will the block slide before coming to a stop? The mass of the bullet is 9.5 g, the mass of the block is 10.5 kg, the bullet's impact ...
*November 6, 2013*

**physics**

HOW DO I DO THIS PLZ HELP I DONT NEED U TO SOLVE I JUST NEED TO KNOW HOW Salmon often jump waterfalls to reach their breeding grounds. Starting 2.65 m from a waterfall 0.584 m in height, at what minimum speed must a salmon jumping at an angle of 25.2 ◦ leave the water to...
*October 28, 2013*

**Physics**

The position of a toy locomotive moving on a straight track along the x-axis is given by the equation: x=t^4-6t^2+9t where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to Answer in units of s.
*September 27, 2013*

**Chemistry**

should be 3 right?
*September 26, 2013*

**Economics/Business**

Our large companies seem to be largely run by hired managers who work for salaries and who are not owner-entrepreneurs. How then do we get the profit motive into large companies?
*September 15, 2013*

**Capitalism**

In a capitalist economy, how can we cure poverty?
*September 14, 2013*

**Economics**

Who has an unlimited checking account with the US Treasurer that enables them to write all the checks they want without regard to having funds in the bank?
*September 14, 2013*

**Science**

help
*September 6, 2013*

**Acc Algebra 2**

x-6/x = 3/5
*September 2, 2013*

**Acc Algebra 2**

consecutive integers are integers like 1,2,3 or 3,4,5 or 101,102,103. So since the largest of the integers is k, to get the consecutive integers lower than k, you have to find the second integer which would be k-1, then the third which would be k-2.
*September 2, 2013*

**Acc Algebra 2**

or if your teacher wants it in this format V=k(k^2-3k-2)
*September 2, 2013*

**Acc Algebra 2**

V=lwh V=k*k-1*k-2 V=k^3-3k^2-2k
*September 2, 2013*

**Bio**

c, more solids(glucose) outside cells in the blood plasma means the water in the cells will move out into the plasma through osmosis.
*August 29, 2013*

**chem**

determine the mass (g) of SO2 that is produced byt the reaction of 15g of CS2 according to the following equation: CS2 + 3O2 = CO2 + 2SO2
*May 20, 2013*

**math**

1) An antique dresser was purchased for $7500 in 2005. The dresser increases in value by 9% per year. Find the value of the dresser in 2025. 2) a) Find the slope of the secant to the curve f(x) = 0.25(4)^(x) - 2 between: p1) x=0 and x = 1 p2) x=0 and x=0.5 p3) x=0 and x=0.1 p4...
*April 2, 2013*

**math**

Give an example of a logarithmic equation that cannot be solved and explain why it cannot be solved. (3 marks)
*March 17, 2013*

**math**

The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in meters, L, through the equation: T=2π√((L)/(9.8)) [it is all under square root] Q1: write in ...
*March 13, 2013*

**science**

never mind i know now thankyou
*January 31, 2013*

**science**

thankyou i appreciate it could u however plz explain how u knew 1 mol of ag =108g
*January 31, 2013*

**science**

thankyou i appreciate it
*January 31, 2013*

**science**

still confused
*January 31, 2013*

**science**

CH3CH2CHO + 2Ag(NH3)2OH = CH3CH2COONH4+2Ag+H20+3NH3 yield of Ag obtained = 75% calculate minimum mass of propanal that must have been used to form 5g of silver
*January 31, 2013*

**gpa**

I'm a sophmore my current gpa from my freshman year came up to be a 1.2, we just finished our first semester my gpa from from first nine weeks and second nine weeks both were a 2.4, was wondering if i stay on track like this will I be able to pull my gpa up to a 2.0 ? and ...
*December 22, 2012*

**math**

The graph shows the cost C in dollars to rent a car for one day as a function of the number m of miles driven. Which of the following functions models the situation?
*December 1, 2012*

**Statistics**

The time per week a student uses a lab computer is normally distributed, with a mean of 6.2 hours and a standard deviation of 0.9 hour. A student is randomly selected. a. Find the probability that a student uses a lab computer less than 4 hours per week. b. Find the ...
*November 30, 2012*

**Physics HELP!**

2. Suppose you pour 15 g of hot water (at 55 oC) into a glass that contains 20 g of ice (at - 10 oC). Neglect the heat absorbed in the glass itself. a. How much heat would the water give up to get cooled to the melting point? b. How much heat would it take to get the ice to ...
*November 19, 2012*

**Physics**

Suppose you pour 15 g of hot water (at 55 oC) into a glass that contains 20 g of ice (at - 10 oC). Neglect the heat absorbed in the glass itself. a. How much heat would the water give up to get cooled to the melting point? b. How much heat would it take to get the ice to the ...
*November 19, 2012*

**Physics**

2. Suppose you pour 15 g of hot water (at 55 oC) into a glass that contains 20 g of ice (at - 10 oC). Neglect the heat absorbed in the glass itself. a. How much heat would the water give up to get cooled to the melting point? b. How much heat would it take to get the ice to ...
*November 19, 2012*

**Chemistry**

A 5.0g KBr sample, at 25 degrees celsius, dissolved in 25 ml of water, also at 25 degrees celsius. the final equilibrium temperature of the resulting solution is 18.1 degrees celsius, What is the enthalpy change in J/g and KJ/mole of KBr.
*November 14, 2012*

**History**

Why might a president's legislative proposal receive strong public support from around the nation yet still encounter opposition in Congress?
*November 14, 2012*

**University Physics**

from my calculations the answer is 128.35seconds
*November 1, 2012*

**Honors Physics **

A plane traveling at 300.0 km/h attempts to land on a 500 m runway. The plane’s engines and brakes accelerate uniformly at –5.0 m/s2. Will the plane be able to land safely?
*October 16, 2012*

**Statistics**

When a truckload of apples arrives at a packing plant, a random sample of 250 is selected and examined for bruises, and other defects. The whole truckload will be rejected if more than 5% of the sample is unsatisfactory. Although it is not known, in fact 8% of the apples on ...
*October 8, 2012*

**Math**

When a truckload of apples arrives at a packing plant, a random sample of 250 is selected and examined for bruises, and other defects. The whole truckload will be rejected if more than 5% of the sample is unsatisfactory. Although it is not known, in fact 8% of the apples on ...
*October 8, 2012*

**US History**

Why Is Alfred T Mahan Important To Us Today?
*October 4, 2012*

**Us History**

In need of help, Who Did Alfred T Mahan Look Up To As A Child?
*October 4, 2012*

**Math**

For the given cost function 16 sqrt x+x^2/3375 The marginal cost at the production level 1700 The minimal average cost
*September 29, 2012*

**Math**

In lowest gear on a 10-speed bike, each turn of the pedals makes the wheels turn 3.4 times. In the highest gear, each turn of the pedals makes the wheels turn 1.8 times. With each turn of the wheels, the bike travels 6.5 feet. How much farther does the bike travel with each ...
*September 24, 2012*

**English-poetry**

I am doing a poetry analysis of John Clare's "IAm!" I need help identifying the emotional/logical climax and the fulcrum of the piece. I have identified its metaphors, similes, imagery, censuara, allusions, repetition. Am I missing something? Here is the poem: I ...
*September 24, 2012*

**Math**

I need to make a bar graph using the data set of my last problem. Data Set: 5,7,7,7,11,12,12,13,14,15,16,18
*September 19, 2012*

**Geometry**

the area of a triangle is 27. its height is 3 times the base. find the height and the base of the triangle.
*September 11, 2012*

**ap geometry**

m is the midpoint of segment jk. jm=x/8 and jk=3x/4 subtracted by 6. find mk
*September 3, 2012*

**Math**

Compute 2^1000(mod 121) using Euler.
*August 2, 2012*

**Math**

Noting that 666=2x3^2x37, find phi(666) using Euler Theorem.
*August 2, 2012*

**Math**

Find the last two digits (units and tens digit) in 1829^1829 and find the units digit in 23^7777.
*August 1, 2012*

**geometry**

Martha climbs 40 steps to reach the first floor of a building. If the vertical and horizontal distance of each step is 1.5 ft and 1 ft, find the distance between the start and end points of each step.
*June 11, 2012*

**Algebra**

Please help!!!! (square root of x) + 3 = square root of (x+12)
*May 20, 2012*

**Algebra**

the length of a rectangle is 1 inch greater than its width if its dimensions are doubled its area increases by 36 square inches give an equation to find its dimensions
*May 8, 2012*

**history**

thanks! Just as I thought just wanted to make sure
*May 1, 2012*

**history**

How do I know why someone wrote a journal(history) or why we still read it today?
*May 1, 2012*

**trig**

a 7 foot tall man is standing 65 feet away from a tower. if the angle of elevation is 35 degrees. what is the height of the tower to nearest tenth of a foot?
*April 18, 2012*

**finance**

you would calculate as follows: Only the income that results from this project is going to be counted. So, all "currently sells X at $" info is ignored! New project: 20580 x $11760 + 4900 x $44100 + -1274 x $83300 (we sell less of these) =351986600
*April 16, 2012*

**Trigonometry**

express in terms of sine and cosine. a) tan theta/ cot theta i know the answer is sin^2 theta / cos ^2 theta but how do you do it?
*March 22, 2012*

**science-Help!**

thanks a lot.
*March 11, 2012*

**science-Help!**

thank you-would this be correct Vinegar with Baking Soda mixed together creates an acid-base, making a gas. The gas pushes up into a balloon and causing the balloon to blow up.
*March 11, 2012*

**science-Help!**

not a specific question but I have to make a poster with my experiment-balloon, baking soda and vinegar each step of the scientific method. but stuck on research.
*March 11, 2012*

**science-Help!**

so I need to search the internet for why my experiment works? because I already came across these two sites and they did not help.
*March 11, 2012*

**science-Help!**

What does it mean in the scientific method that the second step is research? I need to write up the 5 steps of scientific method explaining my experiment-how do i do research?
*March 11, 2012*

**Physics**

Electrical conductivity in liquid solutions depends on the presence of free 1) neutrons 2) protons 3) molecules 4) ions explain please I really don't understand this question
*March 7, 2012*

**U.S History**

Why was there an Agricultural boom during WW1? Why did the boom come to an end?
*March 7, 2012*

**Calculus**

Sketch a possible graph for a function that has the following characteristics. f(0)=2.5 -horizontal asymptote is y=3 -Vertical x=4 -f'(x)<0 and f''(x)>0 for x>4. -f'(x)<0 and f''(x) <0 for x<4 I got the horizontal and vertical but I ...
*March 2, 2012*

**physics**

wo packages at UPS start sliding down the ramp shown in the figure. Package A has a mass of 4.50 and a coefficient of kinetic friction of 0.190. Package B has a mass of 10.5 and a coefficient of kinetic friction of 0.170.
*February 20, 2012*

**math**

. If the mean of six values is 59 and five of the values are 42, 76, 59, 51, and 72 find the sixth value.
*February 9, 2012*

**physics**

How to calculate the potential energy in a CR circuit with a resistor and 10micro-farrad capacitor before the switch is closed. the capacitor has a charge of 100 v and two seconds after the switch is closed looses 37% of its original value.
*February 5, 2012*

**math**

$5 - 110 $10 - 220
*January 10, 2012*

**Spanish-Please check SraJMcGin if possible**

Thank you so much-really appreciate it-
*January 10, 2012*

**Spanish-Please check SraJMcGin if possible**

Please check if you have time we had to select the correct answer for the two questions 1.¿Ellas te escuchan? Ellas me escuchan. 2. ¿Me escuchas? Te escucho.
*January 10, 2012*

**Spanish-Please check SraJMcGin**

This is a diffeent one that the one you checked earlier and thank you again
*January 10, 2012*

**Sapnish-Please check SraJMcGin**

Please check if you have time we had to select the correct answer for the two questions 1.¿Ellas te escuchan? Ellas me escuchan. 2. ¿Me escuchas? Te escucho.
*January 10, 2012*

**Spanish-Thank you Sra**

Thank you very much That was pretty funny about me eating myself-thank you for pointing that out-my teacher would have thought I was muy tonto!
*January 10, 2012*

**Spanish-Thank you**

Thank you for doing that-I really appreciate it-I'm alittle confused on this stuff
*January 10, 2012*

**Spanish-7thgrade**

I had to write a paragraph about what my mom did yesterday and I had to use SOME REFLEXIVE VERBS- I'm not sure if this is correct. Mi madre se despertó a las seis de la mañana. Ella se despertó cuando escuchó e l despertador. Ella se levant&...
*January 10, 2012*

**Korean**

how do you say merry christmas in korean?
*December 6, 2011*

**algebra**

y=5x+3
*December 6, 2011*

**Algebra**

I need to use Pascal's Triangle to expand (x-1)^5 I know I use the fifth row but I'm not sure how to do it- I have a bunch of these and I'm really confused- Please help if you can-
*December 5, 2011*

**Algebra**

oh okay-thank you
*December 2, 2011*

**Algebra**

Explain what happens to the graph y=4^x if you change it to 4^(x+3)+ 2 would it move 3 units to the right and 2 units upward-I'm thinking becaue youi're adding to the x??
*December 2, 2011*

**Economics**

C.
*November 29, 2011*