Monday

September 1, 2014

September 1, 2014

Total # Posts: 2,715

**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*

**Chemistry**

When 1.5 grams of magnesium burns, how many grams of magnesium oxide will be formed? a) Write a balanced chemical equation for the above reaction. b) Show by unit conversion (show conversion factors, ie. 2 g H20 x 1 mole H2O/18 g H2O x ...... x ...... = answer
*June 15, 2012*

**Algebra**

what is the area of a rhombus whose diagonals is 16 and 9
*June 14, 2012*

**Math, Geometery**

A.216.5 sq in. B.228.5 sq in. C.242.5 sq in. D 251.5 sq in.
*June 13, 2012*

**Math, Geometery**

Hey Guys I have a problem like on the kids on here. What is the area of a regular pentagon with a side length of 10 inches and a distance from the center to a vertex of 10 inches? Round by nearest tenth. I know you have to use pythagrean therom to solve for vertex of 10 inch. ...
*June 13, 2012*

**geometry**

In the accompanying diagram of circle O, chord AB busects CD at E. If AE=8 and BE=9, find the length of CE in simplest radical form.
*June 10, 2012*

**Physics Please Help ASAP**

Thankyouuuu So Much Elena you are by far the greatest person who ever lived <3 and u too drwls !
*June 8, 2012*

**Physics Please Help ASAP**

Identify the unknown particles X and X' in the following nuclear reactions. (In parts (a) and (b), enter only the missing product or reactant.) A) X + 4over2 HE -> 24over12 Mg+1over0 n B) 235over92U+1over0 n -> 90over38Sr+X+2and 1over0 n
*June 8, 2012*

**Physics Equations of Motion**

90.5x10^3 :)
*June 7, 2012*

**accounting **

Pearson Corporation makes an investment today (January 1, 2012). They will receive $6,000 every December 31st for the next six years (2012 – 2017). If Pearson wants to earn 12% on the investment, what is the most they should invest on January 1, 2012?
*June 5, 2012*

**Math**

when do you need to regroup in subtraction and explain regrouping steps?
*June 4, 2012*

**Math**

when do you need to regroup in subraction and explain the regrouping steps
*June 4, 2012*

**math**

In your biology class, your final grade is based on several things: a lab score, scores on two major tests, and your score on the final exam. There are 100 points available for each score. However, the lab score is worth 16% of your total grade, each major test is worth 21%, ...
*June 3, 2012*

**English**

Please check. I. Correct any errors in the following sentences. Do not use different verbs (for example, “recline” instead of “lie down”). Provide the correct form of the verb given: 1. Yesterday I let my students lay down for a nap, but most of them ...
*June 3, 2012*

**Social Studies**

its c..
*June 1, 2012*

**Social Studies**

its c....
*June 1, 2012*

**English**

Please check 8. An entry in the New World Encyclopedia. The entry is called Parent Education. It is written by M. S. Fisher. It was published in 2003. Fisher, M.S. Parent Education. Encyclopedia New World. 2003. Print. 9. An essay appeared in the journal called College English...
*June 1, 2012*

**English**

Please check. 1. A book published by Harcourt Press, Inc. It was published in 2001. Harcourt Press is located in the city of New York. The title of the book is Medieval Pageant, and the author is John R. Reinhard. Reinhard, John R. Medieval Pageant. New York City: Harcourt, ...
*June 1, 2012*

**English**

1. A book published by Harcourt Press, Inc. It was published in 2001. Harcourt Press is located in the city of New York. The title of the book is Medieval Pageant, and the author is John R. Reinhard. Reinhard, John R. “Medieval Pageant.”New York City: Harcourt Press...
*June 1, 2012*

**English**

A book published by Harcourt Press, Inc. It was published in 2001. Harcourt Press is located in the city of New York. The title of the book is Medieval Pageant, and the author is John R. Reinhard. How do i cite this source, is there a website that i can go to for help on ...
*June 1, 2012*

**English**

thank you very much!
*June 1, 2012*

**English**

8) Jack said, Did Sue ask you this, When will Jack ask me to marry him Jack said, “Did Sue ask you this,” “ When will Jack ask me to marry him?” 11) Did Jason say this: I want to be a millionaire before I am thirty Did Jason say this, “ I want to be a ...
*June 1, 2012*

**English**

2) Who said, “A penny saved is a penny earned” Who said, "A Penny saved is a penny earned"? 3) Jack told me that I will have to get a job before this summer. Jack told me that I will have to get a job this summer. 4) Go away, yelled Susie, I don't want ...
*June 1, 2012*

**English**

Please check ! 1) Who told you that, asked Jerry? "Who told you that?" asked Jerry. 2) Who said, “A penny saved is a penny earned” Who said, "A Penny saved is a penny earned?" 3) Jack told me that I will have to get a job before this summer. Jack ...
*June 1, 2012*

**english**

correct any errors. Please check my answers. Question: 12) Every player on the team, must give their best effort in the championship game. Every player on the team, must give his or her best effort in the championship game. Question: 13) Each person in the seminar must submit ...
*May 30, 2012*

**english**

Please check! My best friend told his neighbor that he could not take care of the dogs this weekend. My best friend told his neighbor that he could not take care of his dogs this weekend. When he sat the plate on the glass countertop, it broke into a thousand pieces. When he ...
*May 29, 2012*

**English**

The scouts of their mascot must do his or her best to clean up the mess at the campground.
*May 29, 2012*

**English**

Please correct the errors, im not sure on this one. The scouts or their mascot must do their best to clean up the mess at the campgrounds.
*May 29, 2012*

**english**

i think everyone needs to do his or her best to get the job done. Did anyone leave his or her keys on my desk? My dad said nobody knows how to do his or her fair share of the work on this job. Four years of college classes is a long time without an income.
*May 29, 2012*

**english**

correct any errors. I think everyone needs to do their best to get the job done. Did anyone leave their keys on my desk? My dad says nobody know how to do their fair share of the work on this job. Four years of college classes are a long time without an income.
*May 29, 2012*

**english**

correct any erroes. Neither the players nor the coach agree with the referee’s call.
*May 29, 2012*

**grammar/English**

need help correcting this sentence Fire can be either friendly or a foe, depending on the situation to make it parellel
*May 29, 2012*

**Written communications**

Here is my store for my writing assignment. Please tell me if it is good and the errors I made on it. I really need to pass this. It was a cold wintery day in Europe where I lived. I had a family of four. My mom, dad, and sister. My sister, Elizabeth, and I did everything ...
*May 26, 2012*

**written communications**

Okay, when I'm finish will you or someone else check to see if it is good if I post it on here?
*May 26, 2012*

**written communications**

Thank you very much. I just don't want to write all that for nothing.
*May 26, 2012*

**written communications**

I'm doing the writing skills writing assignment and I'm stuck. It says that you have to use "I" like write it from your point of view, and can't use factual information, so I was wandering if I wrote a story pretending I'm a person that was in the ...
*May 26, 2012*

**Physics HELP!**

A block of mass 3 kg slides along a horizontal surface while a 20-N force is applied to it at an angle of 25°. If needed, use g = 10 m/s2. For a coefficient of kinetic friction of 0.3 between the block and the surface, the frictional force acting on the block is most ...
*May 25, 2012*

**geometry**

The equation (x + 6)2 + (y + 4)2 = 36 models the position and range of the source of a radio signal. Describe the position of the source and the range of the signals.
*May 19, 2012*

**accounting**

1.On December 15, 2012, Pascal declared a cash dividend of $2.00 per share to stockholders of record on December 31. The dividend is payable on January 15, 2013. Pascal has issued 1,000,000 shares of common stock, of which 50,000 shares are held in treasury. 2.At December 31, ...
*May 12, 2012*

**Math**

In how many ways can four spades be drawn from a standard deck of playing cards with out replacement?
*May 8, 2012*

**English**

you guys are crazy.
*May 8, 2012*

**Finance**

A person is considering buying the stock of two home health companies that are similar in all respects except the proportion of earnings paid out in dividends. Both companies are expected to earn $6 per share in the coming year, but company D (for dividends) is expected to pay...
*May 7, 2012*

**Finance**

Six years ago, Bradford Community Hospital issued 20-year municipal bonds with a 7% annual coupon rate. The bonds were called today for a $70 call premium- that is, bondholders received $1,070 for each bond. What is the realized rate of return for those investors who bought ...
*May 7, 2012*

**chemistry**

Give delta H for the combustion of propane: C3H8+5O2+3CO2+4H20 +530KCAL delta h= -530 KCAL But how do i figure out how to get this answer? Thanks!
*May 6, 2012*

**ECO/372**

SOME factors include: The inflation rate is an important factor influencing the Fed’s decision to adjust the discount rate. During periods of recession, the Fed will lower the discount rate to attempt to stimulate growth in the economy. The reserve requirements and ...
*May 6, 2012*

**Physics**

A charge of +2.4 × 10−9 C is placed at the origin, and another charge of +4.2 × 10−9 C is placed at x = 2.5 m. Find the point (coordinate) between these two charges where a charge of +3.1 × 10−9 C should be placed so that the net electric ...
*May 1, 2012*

**math**

triangle
*May 1, 2012*

**physics**

A charge of +2.4 × 10−9 C is placed at the origin, and another charge of +4.2 × 10−9 C is placed at x = 2.5 m. Find the point (coordinate) between these two charges where a charge of +3.1 × 10−9 C should be placed so that the net electric ...
*May 1, 2012*

**math**

Use the grid to help you complete the calculation 23x17
*April 29, 2012*

**Honors Trig.**

A plane is flying at a speed and direction of 550 mph, 25 degrees north of west. There is a wind of 28 mph, at an angle of 19 degrees south of the east direction. How fast is the plane actually flying? What direction is the plane traveling?
*April 29, 2012*

**math**

determine if these lines are parallel, perpendicular, or neither 2x+5y=8 and 5x+2y=2
*April 27, 2012*

**Maths**

Solve:- 5ax+6by=28 , 3ax+4by=18 using cross multiplication method
*April 27, 2012*

**physics**

what color appears on the screen where the two beams overlap?
*April 25, 2012*

**physics**

suppose two beams of white light are shone on a white screen, one beam through a pane of red glass and the other through a pane of green glass. what color appears on the screen wehre the two beams overlap?
*April 25, 2012*

**Plz help!!! algebra**

use the binomial theorem to expand the binomial (x-5)^6
*April 21, 2012*

**Plz help!!! algebra**

use the binomial theorem to expand the binomial (x+5)^5 I have tried it like 4 times but i cannot get it right
*April 21, 2012*

**chemistry**

What are the total grams of iron
*April 16, 2012*

**math**

Ms.Lembright ordered the types of muffins below for a class party -12 blueberry muffins for $7.20 -8 chocolate muffins for $4.40 -6 raisin muffins for $4.50 What type of muffin cost the least? show your work please help me!!?
*April 15, 2012*

**PSY315**

Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected,(b) the Z score on the comparison ...
*April 14, 2012*

**Plz help!!! algebra **

convert the decimal 0.6 to a fraction by writing it as a infinite series. I really have no idea how to do this can anyone please help me?
*April 14, 2012*

**algebra**

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6
*April 9, 2012*

**please help!! algebra**

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6
*April 9, 2012*

**algebra**

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6
*April 9, 2012*

**physics**

An object is placed in front of a convex mirror with a 22.6-cm radius of curvature. A virtual image half the size of the object is formed. At what distance is the object from the mirror? Take a positive answer to be in front of the mirror, and a negative answer to be behind ...
*April 5, 2012*

**algebra**

systems of linear equations in 3 variables 1/3x-2/3y+z=0 1/2x-3/4y+z=1/4 -2x-y+z=1 every time i do it is wrong and i cannot figure out what I'm doing wrong please help!!!
*April 2, 2012*

**algebra**

systems of linear equations in 3 variables 1/3x-2/3y+z=0 1/2x-3/4y+z=1/4 -2x-y+z=1
*April 2, 2012*

**algebra **

x-3y+z=8 3x+y-2y=4 x-3y+2z=6
*April 2, 2012*

**algebra**

I do not know how to solve the following systems of linear equations in 3 variables 1) x-2y+z=7 2) 2x+y-3z=-1 3) x-4y+3z=13
*April 2, 2012*

**Physics: Second Part of first question**

If the slide is inclined at 55 , what is thecoefficient of friction between the girl and the slide?
*March 30, 2012*

**Physics. PLEASE HELP!!**

A 22 kg girl slides down a playground slide that is 3.6 m high. When she reaches the bottom of the slide, her speed is 1.7 m/s. The acceleration of gravity is 9.81 m/s2. How much energy was dissipated by fric-tion? Answer in units of J
*March 30, 2012*

**Chemistry**

The resolution limit of a microscope is roughly equal to the wavelength of light used in producing the image. Electron microscopes use an electron beam (in place of photons) to produce much higher resolution images, about 0.16 nm in modern instruments. Assuming that the ...
*March 30, 2012*

**Physics. PLEASE HELP!!**

A skier of mass 71 kg is pulled up a slope by a motor-driven cable. The acceleration of gravity is 9.8 m/s2. How much work is required to pull him 64.6 m up a 33.8 slope (assumed to be frictionless) at a constant speed of 2.53 m/s? Answer in units of kJ
*March 26, 2012*

**Physics. PLEASE HELP!!**

NOTE: 1 MJ = 106J. One of the most powerful cranes in the world, operating in Switzerland, can slowly raise a load of 6000 tonne to a height of 8 m. (1 tonne = 1000 kg) The acceleration of gravity is 9.81 m/s2 . How much work is done by the crane? Answer in units of MJ
*March 26, 2012*

**human development**

is it alzheimer's disease
*March 26, 2012*

**human development**

bulimia Alzheimer's disease osteoporosis menopause
*March 26, 2012*

**human development**

a condition that's generally the result of social pressure is?
*March 26, 2012*

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