Friday

August 22, 2014

August 22, 2014

Total # Posts: 2,690

**AP Chemistry**

A balloon is filled to a volume of 2.0 102 mL at a temperature of 33.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon?
*October 15, 2012*

**math**

Use properties of logarithms to expand each logarithmic expression as much as possible. Where possible evaluate logarithmic expsressions without using a calculator. logb x^7
*October 15, 2012*

**Calculus**

Thank you!!
*October 15, 2012*

**Calculus**

yes,i got 7pi/6 and 11pi/6 is that correct?
*October 15, 2012*

**Calculus**

f(theta)= 4sec(theta)+ 2tan(theta), 0 less than theta less than 2pi. find all critical numbers
*October 15, 2012*

**Science**

How would you prepare 10 mL of 0.08 M NaCl in sodium acetate buffer? (Stock Sodium acetate buffer: 0.1 M)
*October 14, 2012*

**literature**

In what way does the setting of a small town during the Great Depression impact the characters and plot of "Gumption"? a. The characters can use their wealth to choose among many options for resolving conflicts. b. The characters are unconcerned about the way they ...
*October 12, 2012*

**Math (algebra)**

3$ *
*October 12, 2012*

**Math (algebra)**

I have no idea how to solve this problem... A village wants to build a community center that is projected to cost 1.2 million dollars. Cost per resident is increased by #$ as it is discovered that there are 225 fewer residents than when planning began 2 years ago. What is the ...
*October 12, 2012*

**math**

At a fourth of July sale, Wanda bought a table marked for 30% off. What was the original price if Wanda paid only $84?
*October 10, 2012*

**aglebra**

7 x+16-9x=18-13 x+11 x-2
*October 9, 2012*

**Trig!**

Find the following values for each function. A. f(0) B. f(-1) C. f(-x) D. f(x+1) f(x)=2x^2+3x-4 and f(x)=x^2/x+1
*October 9, 2012*

**Chemistry**

Consider a saturated solution of calcium fluoride in 0.086 M potassium nitrate. Complete the following tasks, and then answer the question. a) Write the chemical equation corresponding to Ksp. b) Write the defining expression for the thermodynamic solubility product constant, ...
*October 7, 2012*

**science**

A prisoner that is funny would be what periodic table element?
*October 5, 2012*

**Precalculus**

A direction of S 23 degree W is the same as which of the following in air navigation? Please let me know how you did it. Thank you!
*October 4, 2012*

**business english **

which of the following would not be considered a violation of a convention? A) Abusiness letter is hand written B) A resume is present in an electronic format. C) Clipart is included throughout a loan contract. D) An attorney's business card is printed in red font on a ...
*October 3, 2012*

**Math**

If I have the inputs 1 2 3 4 and 5 and my outputs are 1 4 9 16 and 25 what is the output
*October 2, 2012*

**chemistry**

Calculate ΔG at 25°C for the precipitation of lead(II) chloride from mixing 100. mL of 0.025 M lead(II) nitrate solution with 100. mL of 0.15 M sodium chloride solution. The ΔG° for the reaction at 25°C = −27.36 kJ/mol. (Hint: write out reaction ...
*October 2, 2012*

**statistics**

4. A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time spent studying is ...
*October 1, 2012*

**statistics**

4. A college student is interested in whether there is a difference between male and female students in the amount of time spent studying each week. The student gathers information from a random sample of male and female students on campus. Amount of time spent studying is ...
*October 1, 2012*

**Calculus**

where did you get y^2 -1 from? Did you subtract y^2 from the right side? if so where did the -1 come from?
*October 1, 2012*

**Calculus**

how did you know it was + or - l? I got what x equals but I was confused on how to find the y values?
*October 1, 2012*

**Calculus**

determine the point(s)at which the graph of y^4 = y^2 -x^2 has a horizontal tangent.
*October 1, 2012*

**ECO 372**

How does a stimulus program (through the money multiplier) affect the money supply?
*September 28, 2012*

**Physics science**

Dana and Gina are pushing on a box. Dana pushes with 250 N of force and Gina pushes with 100 N of force. A. What is the net force if tey both push the box in the same direction. B. what is the net force if they push in the opposite directions?
*September 27, 2012*

**organic chemistry**

Why is steam distillation rather than a simple distillation used to isolate eugenol? My answer is because the temperature goes nowhere near their boiling points, which minimises the risk of decompostion. Is it that right? If not then don't you mind if you can explain to me...
*September 26, 2012*

**College Physics **

Vector subtraction (F1 - F2) is a special case of vector addition, since F1- F2 = F1 + (-F2). Use the data (magnitude and direction) of F1 and F2 obtained in measurement 1 to find out the magnitude and direction of the resultant vector of F1 - F2. The data is: F1: 200g and 30...
*September 26, 2012*

**english**

our cat
*September 26, 2012*

**chemistry**

you are supposed to chose the answer (1-6) that best finishes the beginning sentence
*September 19, 2012*

**math**

The 1/2 should be 1/3, sorry
*September 19, 2012*

**math**

Average rate of change: h(x)= x^3 -0.5e^x at [0,1]
*September 19, 2012*

**college physics**

What is the kinetic energy of a 25 kg dog that is running at a speed of 8.9 m/s (about 20 mi/h)?
*September 19, 2012*

**physics**

How much work does gravity do on a 0.120-kg ball falling from a height of 17.0 m?
*September 19, 2012*

**Physics**

A small fish is dropped by a pelican that is rising steadily at 0.52 m/s(b) How far below the pelican is the fish after 2.4 s?
*September 17, 2012*

**math**

A kayak moves at a rate of 12 mph in still water. If the rivers current flows at a rate of 5mph how long does it take the boat to travel 23 miles upstream?
*September 16, 2012*

**Physics**

A large kite of mass 3 kg is flying through the air on a windy day. Currently, the tension from the string on the kite has a magnitude of 7.7 N at an angle of θ = 33.5 degrees. The current acceleration of the kite has a magnitude of a = 7.56 m/s2 at an angle of φ = ...
*September 16, 2012*

**circles**

if spoke of the ferris wheel is 20 feet long what is the circumference
*September 16, 2012*

**circles**

if the distance around the soccer ball is 30 inches what is the radius
*September 16, 2012*

**us history**

ok thank you Ms. Sue
*September 15, 2012*

**us history**

I planned on answering it by saying that the statement wasn't very accurate because it says a single American society, even then a southern Farmer wouldn't be the same as a New Englander due to slavery, differant religions, agriculteral and industry progression, labor ...
*September 15, 2012*

**us history**

i really need help with my thesis statement.... A society is characterized by similar values, shared institutions, and a common culture. Consider the following question: To what extent would it be accurate to say that the New England, Middle and Southern colonies had merged to...
*September 15, 2012*

**economics**

the currency in Great Britain is pound and the price of a particular British car is 12,000. suppose the exchange rate is 0.67 per dollar. what iis the price of the British car in United States dollars?
*September 14, 2012*

**Physics**

A two-stage rocket is launched straight up from rest. It accelerates at 26.4 m/s/s for 3.92 seconds during the first stage. It accelerates at 12.3 m/s/s for 4.48 more seconds during the second stage. After second stage burnout the rocket comes under the influence of gravity ...
*September 12, 2012*

**Physics**

Part 1: Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far apart Ball 1 and Ball 2 are after 5.02 seconds from when Ball 1 was ...
*September 12, 2012*

**Physics**

Part 1: Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far apart Ball 1 and Ball 2 are after 5.02 seconds from when Ball 1 was ...
*September 12, 2012*

**Physics**

Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far Ball 1 has fallen (to two decimal points) by the time Ball 2 is thrown.
*September 12, 2012*

**physics**

Emily takes a trip, driving with a constant velocity of 89.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 70.8 km/h to the north, how long does the trip take?
*September 12, 2012*

**Calculus**

what is the limit of g(theta)= tan(4theta)/4theta.
*September 12, 2012*

**Calculus**

Find if there are any vertical asymptotes: g(theta)= (tan4theta)/(4theta)
*September 11, 2012*

**physics**

A swimmer heads directly across a river, swimming at 1.10 m/s relative to the water. She arrives at a point 52.0 m downstream from the point directly across the river, 72.0 m wide. What is the speed of the river current? What is the swimmer's speed relative to the shore? ...
*September 11, 2012*

**Organic Physiological Chemistry**

draw each of the following compounds using condensed formulas: a) 3,3,5-trimethyl-1-hexene b) 1-bromo-3-chloro-1-heptyne c) 3-heptyne Not sure if I am doing this right, but for a) i put CH3C(CH3)2CH=CH3
*September 11, 2012*

**Chemistry**

I believe you would subtract the dry weight of the alum from the wet alum weight, then divide that answer by the original weight of wet alum: 13.44g(wet) - 11.28g (dry) = 2.16g of water that was lost. 2.16g H20/ 13.44g wet alum =0.1607 X 100 = 16.07% H20 lost Hope this helps :)
*September 11, 2012*

**math**

plug in 4 for x. y=16
*September 10, 2012*

**Calculus**

the limit as x approaches 3 from the right of ln(x^2 -9). what is the limit, if it exist?
*September 10, 2012*

**MATH**

(-5)^4 should be (-5)*(-5)*(-5)*(-5) for -(10)^2 was the negitive attached to the ten if so its (-10)*(-10) if not then its (10)*(10)*(-1)
*September 8, 2012*

**Calculus**

What x-values make f not continuous f(x)= x/(x^2 -3)
*September 8, 2012*

**math**

y=-.5 x=-5/2
*September 8, 2012*

**Calculus**

Find the constants a and b such that the function is continuous on the entire line f(x){7, x is less than or equal to -3 ax+b, -3 is less than x is greater than 4 -7, x is less than or equal to 4
*September 8, 2012*

**powers of exponents math**

0k, d) -8, f)-16
*September 8, 2012*

**powers of exponents math**

Is the * multiplication or the exponent?
*September 8, 2012*

**Algebra**

How you wrote your question is kind of confusing.
*September 8, 2012*

**history**

I need help with six dialouge questions for jesus or abraham would anyone help me please its due monday? Example: Budda,what would you say is the most notable difference between Buddism and Hinduism?
*September 7, 2012*

**Math/Geometry**

If 2x=20, does x=10?
*September 6, 2012*

**science**

Ask Zeus
*September 4, 2012*

**science**

the mass of a shot an Olympic shot putter throws should be measured in what
*September 4, 2012*

**chemistry**

Sodium (Na) metal undergoes a chemical reaction with chlorine (Cl) gas to yield sodium Cl, or common table salt. If 1.00 g of sodium reacts with 1.54 g of chlorine, 2.54 g of sodium chloride is formed and 17.9 kJ of heat is released. How much sodium and how much chlorine is ...
*September 4, 2012*

**physics**

find the mass of a balloon filled with helium if its volume is .25 m cubed the density of the helium is .178
*September 2, 2012*

**writing**

Type a short character sketch of a fictional Puritan named Justice Johnson based on what you have learned about the Puritans. Make certain that you describe how he dresses, how he lives, what he believes, how he spends his time--in short, describe him so that a stranger, who ...
*August 30, 2012*

**Algebra 1**

Elimination and substitution are two methods
*August 30, 2012*

**Algebra**

One more than the product of and Mabel's score translate to algebraic expression
*August 30, 2012*

**math**

6d-3d+2d=35 Add all the "d" values together, so... 5d=35 divide by 5 from both sides to isolate "d" 5d/5=35/5 therefore, d=7
*August 29, 2012*

**Physics**

A person takes a trip, driving with a constant speed of 92.0 km/h except for a 22.0 min rest stop. If the person's average speed is 78.6 km/h, how long is the trip?
*August 29, 2012*

**Physics**

A tennis ball with a speed of 5.0 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 3.0 m/s. If the ball is in contact with the wall for 0.013 s, what is the average acceleration of the ball while it ...
*August 29, 2012*

**geometry**

If F is between E and G, and EF = 8x - 14, FG = 4x -1 and EG =59, then what does x equal?
*August 29, 2012*

**algebra**

i'm not sure what the answer is can you tell me waat it is
*August 27, 2012*

**chemistry**

what is the characteristics of solids, liquids,gases
*August 21, 2012*

**Physics**

A. A baseball is seen to pass upward by a window 28.1 m above the street with a vertical speed of 13.7 m/s. If the ball was thrown from the street, what was its initial speed? B. What altitude does it reach? C. How long before the ball passed the window was it thrown? D. How ...
*August 21, 2012*

**alegbra**

a tugboat goes 160 miles upstream in 20 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current.
*August 19, 2012*

**Geometry**

If a circle with center O has equilateral triangle AOB inscribed with sides 10 inches long. If OC is perpendicular to AB at P, what is the length of AP in inches?
*August 18, 2012*

**math**

709
*August 14, 2012*

**His 103 World Civilization I**

•How has the nature and technology of warfare evolved, from earliest times to 1500 CE?
*August 11, 2012*

**math advanced functions**

a) Determine the measure of the central angle that is formed by an arc length of 5 cm in a circle with a radius of 2.5cm. Express the measure in both radians and degrees, correct to one decimal place. b) Determine the arc length of a circle in part a) if the central angle is ...
*July 24, 2012*

**Calc**

Am I doing this correct? y-y1=m(x-x1) y-1/2=-1/2(x-2) y-1/2=-1/2x+1 add 1/2 to both sides y=-1/2x+1.5
*July 20, 2012*

**Calc**

I meant f(x)sqrt(x^2+6x), thank you!
*July 20, 2012*

**Calc**

Find the equation of the tangent line to f(x)=sqrtx^2+6x at x=2, give your answer in slope-intercept form
*July 20, 2012*

**Civics**

Can someone please help
*July 19, 2012*

**Civics **

By the start of World War I, America had emerged as a global power. A large part of this power had to do with American expansion overseas. What territories did America acquire during the late 19th and early 20th centuries? What competing arguments exist regarding this period ...
*July 19, 2012*

**math**

sin è=? O=8 H=16
*July 18, 2012*

**math**

yes
*July 14, 2012*

**math**

i was thinking neither..im not sure though
*July 14, 2012*

**math**

Triangle ΔABC has vertices A(2,5), B(8,1) and C(-2,-1) and is a right triangle. If the slope of AB is -2/3 and the slope of AC is 3/2, are the lines parallel, perpendicular or neither?
*July 14, 2012*

**Math**

The sum of the angles of any triangle always equals ?
*July 9, 2012*

**chemistry**

The disintegration of a radioisotope, such as I-131 to Xe-131, is another example of a first-order reaction. It has a half-life of 8.0 days. I-131 -> Xe-131 + e If you start with 1.40 g I-131, how many grams of I-131 will be left after the following days? 08 days: g, 16 ...
*July 1, 2012*

**chemistry**

The disintegration of a radioisotope, such as I-131 to Xe-131, is another example of a first-order reaction. It has a half-life of 8.0 days. I-131 -> Xe-131 + e If you start with 1.40 g I-131, how many grams of I-131 will be left after the following days? PLEASE HELP!!!!
*July 1, 2012*

**Chemistry**

A half-life of a H2O2 solution at a certain condition is 4 weeks. You have a 100 mL of 1.00M H2O2 solution. How many moles of H2O2 will be left in the solution after the following weeks? 04 weeks after: moles 08 weeks after: moles 16 weeks after: moles 20 weeks after: moles
*July 1, 2012*

**Organic Chemistry**

A half-life of a H2O2 solution at a certain condition is 4 weeks. You have a 100 mL of 1.00M H2O2 solution. How many moles of H2O2 will be left in the solution after the following weeks? 04 weeks after: moles 08 weeks after: moles 16 weeks after: moles 20 weeks after: moles
*July 1, 2012*

**Geometry**

Joel is laying pipe for a sprinkler system before he plants his lawn.The lawn is a rectangle 15 feet long and 8 ft wide. He needs to lay a piece if pipe that will run diagonal along the lawn. It will divide the area of the lawn into two right triangles. what will be the length...
*June 21, 2012*

**Science**

oh my goodness, thank you so much!
*June 20, 2012*

**Science**

How did Galileo come to the conlcusion that the moon has mountains on its surface? Please don't give me the answer! Just a website that contains the answer would be great, thanks.
*June 20, 2012*

**chemistry**

What is the final temperature of 15.0 g water initialy at 5.5 degrees celcius when 1140 J is added?
*June 20, 2012*

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