Sunday

February 14, 2016
Total # Posts: 1,368

**Physics**

Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 2 L, the pressure is 1065 kPa (kilopascals). What is the pressure when the volume is 15 L?
*February 8, 2016*

**Chemistry **

Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 2 L, the pressure is 1065 kPa (kilopascals). What is the pressure when the volume is 15 L ?
*February 8, 2016*

**Math**

A trapezoid has an area of 24 square meters. The lengths of the bases of the trapezoid are 5 meters and 7 meters. What is the height of the trapezoid? • 4 meters************ • 144 meters • 2 meters • 1 meter
*February 4, 2016*

**Math plz help one qustion only!!!!!!!!!!!!!!!!!!!!**

A trapezoid has an area of 24 square meters. The lengths of the bases of the trapezoid are 5 meters and 7 meters. What is the height of the trapezoid? • 4 meters************ • 144 meters • 2 meters • 1 meter
*February 4, 2016*

**Physics**

is the mechanical energy of a teflon coated block sliding down a rough incline remaining constant?
*January 25, 2016*

**math**

the price of lemonade went from .20 to .25 what is the percentage increase?
*January 14, 2016*

**gifted ELA**

Try doing Trixter's answers but in the opposite order like 12 is 1 and 11 is 2 etc...it might be legit
*December 5, 2015*

**gifted ELA**

Lol yeah those aren't right they don't make sense. Can someone give legit answers please?
*December 5, 2015*

**Maths**

€120 x .40 = 48 120 + 48 = 168
*November 18, 2015*

**Math**

A = 17500h B = 400h X • A = 3h • B = 2 X • 3 = 1 • 2 = 1 A = 17500 / 3 = 5833.33 or 5833 B = 400 / 2 = 200 5833 + 200 = 6033 ------------------------------- Y • A = 1 • B = 4 Y • 1 = 1 • 4 = 1 A = 17500 / 1 = 17500 B = 400 / 4 = 100 ...
*November 18, 2015*

**math**

If the digits of the number are reversed, the number is increased by 36. The sum of the digits in the number is two and one–half times their difference. What is the number?
*November 18, 2015*

**math**

Twice the sum of two numbers exceed three times their difference by 8, while half the sum is one more than the difference. What are the numbers?
*November 18, 2015*

**math**

18 (M) 15 (S) 13 (E) 10 (M,E) 8 (M,S) 3 (E,S) I made a venn diagram with 3 circles for this lol. Math 10 (M,E) + 8 (M,S) = 18 18 (M) - 18 = 0 Science 8 (M,S) + 3 (E,S) = 11 15 (S) - 11 = 4 Eng 10 (M, E) + 3 (E,S) = 13 13 (E) - 13 = 0 10 (M,E) + 8 (M,S) + 3 (E,S) + 0 (M) + 4 (S...
*November 18, 2015*

**math**

a. 40 sol. 20 x 4 = 80 (max) 20 x 2 = 40 80 – 40 = 40 (min) b. 2 marks sol. 10 (correct answers) x 4 (marks given to every correct answer) = 40 8 (wrong answers) x 2 (marks deducted to every wrong answer) = 16 40 (marks by correct answer) – 16 (marks that will be ...
*November 18, 2015*

**mathss**

It's impossible to add three odd numbers for a sum that is an even number. ex 1+3+5 = 9 3+5+7 = 15 5+7+9 = 21
*November 18, 2015*

**maths**

20 x 4 = 80
*November 18, 2015*

**Math**

In 5 years, Ana's age will be twice the age of her friend Jun. 5 years ago, she was 3 times as old as her friend. Find their present ages.
*November 17, 2015*

**math**

12 x 15 = 180 180 x 5 = 900 900 + 245 = 1145
*November 17, 2015*

**Integer Exponents**

1) (6abc^2) / 15a^2 x (2bc / 3a)^-2 = 2) (4x^3 2x^-4) / (5x)^-1 =
*November 17, 2015*

**math (Calculus III)**

In this example we should use the beta function. But I'm a bit lost, because I don't know how to change the limits of the integral to fit the one that is needed when using B-function. The problem goes like this: integrate cos^7(x) dx, limits of the integral are from 0 ...
*November 17, 2015*

**physics b**

If heat Q is required to increase the temperature of a metal object from 4°C to 6°C, the amount of heat necessary to increase its temperature from 6°C to 12°C is A Q B 2 Q C 3 Q D 4Q please help me asap
*November 12, 2015*

**physics b**

If heat Q is required to increase the temperature of a metal object from 4°C to 6°C, the amount of heat necessary to increase its temperature from 6°C to 12°C is _____.
*November 12, 2015*

**MATH**

Thank you
*November 4, 2015*

**MATH**

Is the simplified form of 2square root of 3 − 2square root of 3 rational? Yes or no
*November 4, 2015*

**Math**

Simplify 3 square root of 5 end root minus 2 square root of 7 end root plus square root of 45 end root minus square root of 28. A.2 square root of 12 B.2 square root of 2 C.6 square root of 5 - 4 square root of7 D.6 square root of 10 - 4 square root of 14
*November 4, 2015*

**Math**

Mr. Niles has a box of accessories for clarinets. He has a total of 42 objects. He has 12 mouthpieces. He has four times as many reeds as neck straps. How many of each object does he have? I tried so hard but I just didn't understand it and I am in fifth grade. Please ...
*November 3, 2015*

**math**

rebecca bought 1 1/2 pounds of grapes, they cost her $3.72 per pound. What was the total cost of her grapes?
*November 2, 2015*

**physics**

A 38 kg penguin is sliding across a patch of ice, starting at 13 m/s. If the coefficient of friction is .12, how far will the penguin slide before incomes to a halt.
*October 23, 2015*

**biology**

The American curl is a breed of cat that has curly ears. The allele for curly ears is dominant. Suppose a male cat with the heterozygous genotype is bred to a female cat with the homozygous recessive genotype. Predict the number of kittens that will have the phenotype for ...
*October 21, 2015*

**Science **

Hi!I wished you can help me with my science fair project.I don't know what to do or which to pick.Please help me.Any suggestion?I'm a fifth grader by the way.I appreciate it a lot. Endless Thanks, Marie
*October 13, 2015*

**math**

If someone paid $59.00 on their taxable income with a state income tax rate of 6%, determine the amount of their taxable income.
*September 26, 2015*

**math**

I'm trying to solve them but I kept getting them wrong, so my plan B is to get the answer from somewhere else, because I'm struggling whit this quiz.
*September 7, 2015*

**math**

A factory is to be built on a lot measuring 210 ft by 280 ft. A local building code specifies that a lawn of uniform width and equal in area to the factory must surround the factory. a) What must the width of the lawn be? b) And If the dimensions of the factory are A ft by B ...
*September 7, 2015*

**math**

Suppose an object is dropped from a height h0 above the ground. Then its height after t seconds is given by h=−16t^2+h0, where h is measured in feet. If a ball is dropped from 48 feet above the ground, how long does it take to reach ground level?
*September 7, 2015*

**math**

Thanks, those are the same results that I got, but I don't know why it keeps giving me a note that it says that my answer is wrong.
*September 7, 2015*

**math**

What must the width of the lawn be? and If the dimensions of the factory are A ft by B ft with A<B, then A=? B=?
*September 7, 2015*

**math**

A factory is to be built on a lot measuring 210 ft by 280 ft. A local building code specifies that a lawn of uniform width and equal in area to the factory must surround the factory.
*September 7, 2015*

**math**

The perimeter of a rectangle is 24, and its diagonal is √74. Find its dimensions and area.
*September 7, 2015*

**English**

oh no you misunderstood what I need to do. I will explain it a bit different. The original sentence is: Age had finally wearied him. And I need to describe to position of the adjunct finally. So in an other sentence it could be: "A few years later, the French army band ...
*August 30, 2015*

**English**

Hey guys! I need to say at which position "finally" stands. and I have no idea... Here the sentence: Age had finally wearied them. At the other sentences it was after the subject or before the predicate. something like that. And here I'm lost... Can you help me?
*August 30, 2015*

**math**

a jar contains 50 marbles that are the same size. There are 15 blue,8 yellow,and 27 red marbles.How many marbles are blue?
*July 9, 2015*

**Chemistry - PLEASE HELP!!!**

25g NaOH is dissolved in 10 ml h20 and added to 100 ml volumetric flask. Calculate the concentration in molarity.
*May 17, 2015*

**Personal Finance**

The Hernandez family is experiencing some financial pressures, even though the couple has a combined income of $66,000. Also, their eldest son, Joseph, will start college in only three years. Maria is contemplating going to work full time to add about $25,000 to the family'...
*May 14, 2015*

**Math Please Check My Answer**

Did you get this question right please answer ASAP! Thanks!
*May 7, 2015*

**science**

So I found the pressure of each one by foing 50.0 atm* 0.96 for N2 and got 48 atm. For PH2 I did 0.0035 * 50.0= 0.175 atm. For PNH3 0.03506* 50.0= 1.1753 atm, but I feel like I did something wrong because I don't know where to go from here
*April 16, 2015*

**science**

A mixture of nitrogen gas, hydrogen gas and ammonia gas reacts by: N2(g) + 3H2(g) = 2NH3(g) If the total pressure in the reaction vessel is 50.0 atm ans the equilibrium mixture contains by volume: N2= 96.143% H2= 0.3506% NH3= 3.506% what is the equilibrium constant (Kp)?
*April 16, 2015*

**Chmistry**

pcl3(g) cl2(g) ¨ <--- pcl5(g) Energy Some PCl3 and Cl2 are mixed in a container at 200 degrees celius and the system reaches equilibrium according to the equation above. Which of the following causes and increase in the number of moles of PCl5 present at ...
*April 16, 2015*

**MATH EQUATIONS**

Just learned equations and want to know if i am doing right 4 problems. 4y= 2x-2 2y=2x6 ans (-7,-4) x+2y=7 3x-2y= -11 ans (-1,4) 4x-3y= -20 5x-7y= -64 ans (4,12) 2x-5y=-1 3x+2y=8 ans (2,1)
*March 15, 2015*

**Math - Equations**

Just learned equations and want to know if i am doing write.. 4y= 2x-2 2y=2x6 ans (-7,-4) x+2y=7 3x-2y= -11
*March 15, 2015*

**Algebra**

In an arithmetic sequence where a6=13 and a10=25, what is the explicit formula for the general term an?
*March 12, 2015*

**Chemistry**

Help i am trying to plot data and then determine the best value of R. my data P(atm) 2.014,2.797,3.571,4.114 and V(L) 21.153,15.231,11930,10.355. there is more data but if I am given the process at starting place I would like to complete myself. thank you
*March 4, 2015*

**Religion**

"The Ethics of Belief" by W.T Clifford. Write an essay that describes his attitude towards belief. Be sure to address the following issues: 1. why does Clifford say what we believe is not merely a private matter, but a moral issue? 2. What is morally permissible for...
*March 4, 2015*

**statistics**

Suppose for the same 3000 women, we also measured their weight. Suppose the data were again normally distributed. The average weight is 143 lbs., and the standard deviation is 30 lbs. Suppose the correlation between height and weight is r = +.69. What is the slope of the best-...
*March 1, 2015*

**statistics**

can you at least explain what i can do in order to ge the answer to g-j?
*February 22, 2015*

**statistics**

Consider the following situation, and answer each of the following multiple choice questions. In your write-up, just list the sub-question letter (A-J) and your answer – no need to restate the question or to justify your answer. Situation: You have 400 data points, which ...
*February 22, 2015*

**accounting**

what accounts are affected when you invest in additional equipment for the business?
*February 8, 2015*

**Is this right**

An oxygen molecule consists of two oxygen atoms whose total mass is 5.3 x 10-26 kg and whose moment of inertia about an axis perpendicular to the line joining the two atoms, midway between them, is 1.82 × 10-46 kg·m2. From these data, estimate the effective ...
*February 5, 2015*

**math**

18 children are present in class, 1/4 are absent. How many children are there in the class altogether?
*February 4, 2015*

**delete post please**

Please delete my post Posted by Marie on Thursday, January 29, 2015 at 3:59pm.
*January 30, 2015*

**English**

Sorry the way this essay is appears is different from how I typed it. I indented and left spaces....
*January 29, 2015*

**English**

Hi! I made an essay please tell me what I am missed or how I did. And how can I improve it. Also does it sound good enough for a University student? btw I have a request if you can delete this essay after giving feedback because it's personal and private please understand...
*January 29, 2015*

**Math - Problem solving**

I did guess and check and would like to know how to set up an equation.
*January 27, 2015*

**Math - Problem solving**

I used the guess and check method for solving this problem but would like to know how to set up the equation. A camp counselor buys granola bars and juice drinks for the campers. She decides to buy 3 times as many drinks as granola bars. Predict how many of each she can buy on...
*January 27, 2015*

**Math - Problem solving**

Thanks. Membership last year was $60 and membership this year is $80.
*January 27, 2015*

**Math - Problem solving**

How do I solve this type of problem? How many steps are there. The cost of a membership at a health club last year was 75% of the cost at the club this year. This year's membership costs $20 more than last year's membership. Find the cost of a membership last year and ...
*January 27, 2015*

**Physics **

A 6.6 g bullet is stopped in a block of wood (mw = 6 kg). The speed of the bullet-pluswood combination immediately after the collision is 0.8 m/s. What was the original speed of the bullet? Answer in units of m/s.
*January 26, 2015*

**Physics**

Two students on roller skates stand face-toface, then push each other away. One student has a mass of 96 kg and the second student 56 kg. Find the ratio of the magnitude of the first student’s velocity to the magnitude of the second student’s velocity.
*January 24, 2015*

**science**

Which cells identify as the ones most likely to hold the key to increased human longevity and vitality and how might this work? Describe one alternative to cloning
*January 16, 2015*

**health**

What are some arguments against extending human life? Please describe at least one objection and one objection from your research and experience.
*January 16, 2015*

**Calculus**

Evaluate using the sum of a finite geometric series: The sum of 2^i on the range from i = 1 to n. Please Help! I don't know how to make the exponent in 2^i = to i-1!
*January 10, 2015*

**Math**

Ok..great..thx for checking.
*January 1, 2015*

**Math**

Reiny ..thanks for the formula and example. I tried it and i get that both sets of triangles are congruent but it is multiple choice with one answer. I dont know what i am doing wrong. How do I determine which two triangles on a graph are congruent. ∆QRS and ∆DEF ...
*January 1, 2015*

**Physics**

Starting from Newton’s law of universal gravitation, show how to find the speed of the moon in its orbit from the earth-moon distance of 3.9 × 108 m and the earth’s mass. Assume the orbit is a circle. So I calculated this and got 1.0 km/s, I was just wondering ...
*December 31, 2014*

**MATH**

Thanks. I used the distance formula but i am getting that both sets are congruent but there is only one answer and I don't know what i did wrong.
*December 31, 2014*

**MATH**

I entered the wrong coordinates in a previous question, i corrected down below. How do I determine which two triangles on a graph are congruent. ∆QRS and ∆DEF or ∆ABC and ∆XYZ. i found the coordinates of both sets: QRS Q(-2,5), R(-2,1), S(-5, 1) DEF D(5...
*December 31, 2014*

**Math**

What is the distance formula?
*December 30, 2014*

**Math**

How do I determine which two triangles on a graph are congruent. ∆QRS and ∆DEF or ∆ABC and ∆XYZ. i found the coordinates of both sets: QRS Q(-2,5), R(-2,1), S(-5, 1) DEF D(5,-5), E(5,-2), F(2,-2) or ABC A(4,5), B(6,2), C(2,2) XYZ X(-4,-5), Y(-6,-2), Z(-...
*December 30, 2014*

**Math**

∆ABChas vertices A(–1, –2), B(–4, –4), and C(–3, –5). Graph ∆ABC and its image after a reflection over the x-axis. Name the coordinates of the vertices of the reflected triangle...is it A(1,-2), B(3, -4), C(2,-5) or A(-1,2), B(-3,4), C...
*December 29, 2014*

**NEED HELP ASAP PHYSICS**

A car traveling 16.0m/s crashes into concrete embankment and stops in 0.08s. Calculate: the initial speed in mi/hr the average acceleration of the car during the collision in m/s^2 Please show all work than you
*December 19, 2014*

**PHYSICS NEED HELP ASAP**

A car traveling 16.0m/s crates into concrete embankment and steps in 0.08s. Calculate: the initial speed in mi/hr the average acceleration of the car during the collision in m/s^2 Please show all work than you
*December 19, 2014*

**Algebra**

Solve the following system of equations using the substitution method:5x-7y=-18 and 4x+3y=20
*December 13, 2014*

**Physics help**

A soccer player kicks a soccer ball at +10.0 m/s at an angle of 60°. What are the horizontal and vertical components of velocity of the kick? So I got; vx = +8.66 m/s and vy = +5.00 m/s but I feel like I might have gotten the + and - wrongs..Did I mess up on them or did I ...
*December 11, 2014*

**Math**

Find an equation of the parabola that has the indicated vertex and whose graph passes through the given point Vertex:2,-1 Point:4,-3
*December 6, 2014*

**College Algebra**

7200
*December 3, 2014*

**Stock question**

Thanks
*November 13, 2014*

**Stock question**

I have to write about the positive effects of an investor buying stocks of a company but I would like to know about the negative affects so I could add them to my essay but I cant really understand how it could be bad for an investor to buy a stock of a company,.. could you ...
*November 13, 2014*

**english**

The fishing having become so poor, we packed up camp and moved to another lake. past participial phrase noun clause adverb clause nominative absolute elliptical clause
*November 7, 2014*

**statistics**

Siegel found that elderly people who owned dogs were less likely to pay visits to their doctors after upsetting events than were those who didn’t own pets. Similarly, consider the following hypothetical data. A sample of elderly dog owners is compared to a similar group (...
*November 5, 2014*

**Finance**

2. Jamie Thompson is thinking about investing in some residential income-producing property that she can purchase for $200,000. Jamie can either pay cash for the full amount of the property or put up $50,000 of her own money and borrow the remaining $150,000 at 8% interest. ...
*November 2, 2014*

**Calculus**

You don't have to derive anything?
*November 2, 2014*

**Calculus**

Two lovers have a spat and swear they will never see each other again. The girl walks due south at 6 mph while the boy walks at 10 mph on a heading of North 60 degrees West. How fast is the distance between them changing 30 minutes later?
*November 2, 2014*

**Calculus**

Consider the closed curve in the xy plane: 2x^2-2xy+y^3=14 a) show that dy/dx=2y-4x/3y^2-2x (I got this part) b) find equation lines to the curve when y=2 c) if the point (2.5, k) is on the curve, use part b to find the best approximation of the value of k
*October 20, 2014*

**Calculus**

Consider the closed curve in the day plane: 2x^2-2xy+y^3=14 a) show that dy/dx=2y-4x/3y^2-2x (I got this part) b) find equation lines to the curve when y=2 c) if the point (2.5, k) is on the curve, use part b to find the best approximation of the value of k
*October 20, 2014*

**soc 120**

Florynce Kennedy would agree with which statement? Making abortion illegal is the result of continual undermining of women’s rights. If men could get pregnant, abortion would be illegal. Women have had historical power to make decisions about legislation that relates to ...
*October 14, 2014*

**Chemistry **

Calculate amount of 1 M acetic acid and 1M sodium acetate necessary to prepare 50 ml of a 0.15 M buffer at ph 4.80. (pka acetic acid =4.74)
*October 8, 2014*

**physics**

This question is also frustrating me. I just don't a single clue how to do it. A pilot must fly his plane north with a speed of 550 km/hr. A wind of 138 km/hr is blowing at an angle of 31 degrees N of E . What speed does the plane need to keep the desired ground velocity?
*October 8, 2014*

**physics**

A boat must head due north across a river channel that has a current of 9 km/hr towards the west. The boat is capable of traveling at 28 km/hr in still water. If the boat heads into the current to keep its true north course, what will be the resultant velocity of the boat? I&#...
*October 8, 2014*

**physics**

A bicyclist is pedaling along a road that is sloped upward with angle theta. At which of these road elevation angles must the bicycle wheels exert the greatest force back on the road to move the bicycle forward at the same constant speed?
*October 8, 2014*

**science**

The energy of a mole of photons with frequency 6.00x10^14Hz is what in kJ?
*September 24, 2014*

**Algebra**

Simplify (4-2i/-10+5i) x (3-i/-3+i)
*September 22, 2014*