Tuesday

September 16, 2014

September 16, 2014

Total # Posts: 997

**physics**

if the diamter of a human hair is (50*10^-6 m) estimate the volume of hair on your head
*September 13, 2014*

**english**

what genre is Black Ships Before Troy ~ by Rosemary Sutcliff?
*September 1, 2014*

**Physics **

A 4.5kg box slides down a 4.1-m -high frictionless hill, starting from rest, across a 1.7-m -wide horizontal surface, then hits a horizontal spring with spring constant 490N/m . The other end of the spring is anchored against a wall. The ground under the spring is frictionless...
*June 8, 2014*

**Physics **

A horizontal spring with spring constant 110N/m is compressed 16cm and used to launch a 2.8kg box across a frictionless, horizontal surface. After the box travels some distance, the surface becomes rough. The coefficient of kinetic friction of the box on the surface is 0.15. ...
*June 8, 2014*

**Workplace Skills**

I don't know if AJ's termination would show up on a background check, and I was not able to find anything online.
*May 25, 2014*

**Workplace Skills**

We're supposed to read over the following scenario and provide advice for AJ: AJ has a job that he really likes and pays well, but he is worried he is about to be terminated. He doesn't want to quit his job and give up his excellent pay, but he knows that being fired ...
*May 25, 2014*

**Physics**

(637) A cyclist is riding on a horizontal frozen meadow. He is turning so that he is tilted at an angle of 60°. Radius of curvature of the bend is 100m. What is the maximum speed of the cyclist? Thank you for your time!
*May 25, 2014*

**Physics**

(595)Vinyl record spinning at 45rpm. What is the frequency of rotation (in Hz)? What is the orbital time of the vinyl record (in seconds)?
*May 25, 2014*

**social studies**

What do people in Catalonia celebrate every April 23rd?
*April 23, 2014*

**social studies**

What major land form and body of water cover much of northern south america?
*April 23, 2014*

**Physics**

The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, a potential difference of about 0.070 V exists across the membrane. The thickness of the membrane is 0.000000008 m. What is the magnitude of the ...
*April 19, 2014*

**world history**

How has the global economy changed after the Cold War?
*April 19, 2014*

**world history**

Ghana but but the movement there was relatively peaceful. Or Algeria
*April 16, 2014*

**world history**

Which African independence movement is most similar to the movement in Kenya? I'm thinking the one in Haiti but I'm not sure
*April 16, 2014*

**Chemistry**

what is the pH and pOH of a solution made by adding water to 15 grams of HCl until the volume of the solution is 2500mL?
*April 5, 2014*

**Chemistry**

ohh okay now i understand. thank you
*March 4, 2014*

**Chemistry**

so v would be 83mL?
*March 4, 2014*

**Chemistry**

what volume of concentrated 18M H2SO4 is required to prepare 250mL of a 6.0M solution? how would you solve this problem? i know it has something to do with the molarity formula but no idea how to apply it
*March 4, 2014*

**Chemistry Help**

1.) Calculate the number of atoms in 2.58 mol antimony. 2.) Determine the mass of 1.45 mol FePO4. 3.) Calculate the number of mol in 6.75 g of NaCl. 4.) What is the volume, in liters, of 2.54 mol methane (CH4) gas?. 5.) What is the percent composition of B4H10?
*February 10, 2014*

**health**

I don't know if you can access this (not sure if this information is free) but there is a review on the negative and positive health effects on alcohol consumption. Since I cannot post the link, here is the reference: Grønbæk, M. (2009). The positive and ...
*January 20, 2014*

**physics**

a 1.2 kg cart slides eastward down a frictionless ramp from a height of 1.8 m and then onto a horizontal surface where it has a head-on elastic collision with a stationary 2.0 kg cart cushioned by an ideal Hooke's law spring. the maximum compression of the spring during ...
*November 18, 2013*

**Physics**

In a demonstration in physics class, a 1.2 kg dynamics cart starts from rest at the top of a ramp. the ramp is 2.4 m above the ground. the cart then rolls down to the bottom of the ramp, where it collides with a stationary 1.4 kg dynamics cart. Assume that an elastic head-on ...
*November 18, 2013*

**Physics**

please help Ms. SUE!!!!
*November 18, 2013*

**ap world history**

so Asia?
*September 22, 2013*

**ap world history**

which region of the world benefited more from the columbian exchange?
*September 22, 2013*

**ap world history**

how did wheat impact the Americas?
*September 22, 2013*

**ap world history**

where did wine originate?
*September 2, 2013*

**world history**

How did it spread in the periods from 870 B.C.E to about the 18th century, mostly in Greece and Rome
*August 30, 2013*

**world history**

to what places did wine spread?
*August 30, 2013*

**world history**

1. How does the story of Coca-Cola relate to the rise of capitalism and entrepreneurship in the 19th and early 20th c? 2. what is the "iron curtain"?
*August 29, 2013*

**math**

John's age = Sally's age - 3 years Elissa's age = 13 years Sally's age = Elissa's age - 3 years = 13 -3 = 10 years Now that we know Sally's current age, we can figure out John's age. John's age = 10-3 = 7 years So if John is 7 years as of now, ...
*April 5, 2013*

**math**

7.49+2.05/0.50-0.59 FOLLOW BEDMAS 1) First do the division in the question 7.49+4.1-0.59 2) Now add and subtract = 11
*April 3, 2013*

**Math**

So this question is wanting you to identify some sort of pattern. Let's write it out as the following (makes it easier to visualize): 2,8,32,?,?,? Now, I can see a pattern right away. 2 x 4 = 8 8 x 4 = 32 32 x 4 = 128 (month 4) 128 x 4 = ? (month 5) and so on and so forth...
*April 3, 2013*

**math**

Let's say X represents a full can of paint If X represents a full can on paint, then: - 1/8 of X was used in the morning - 5/8 of (7/8 of X) was used in the afternoon So you would add the two values together to get a sum 1/8X + 5/8(7/8X) = 1/8X +35/64X =43/64X Therefore 43...
*April 2, 2013*

**math**

x-y=0 x+y = 4 x+y+x-y=4+0 2x=4 x=2 Therefore y=2 x=2 y=2
*April 2, 2013*

**math**

So the formula for the area of this photograph would be the following: area = length x width (let's fill in what we know from the question into this formula) 28 =(2w-1) * w (Now let's use the distribution rule and multiply everything in the brackets by 'w') 28...
*April 2, 2013*

**Math**

Let us call the jar of peanut butter "P" Let us call the loaf of bread "L" Now let us make some mathematical sentences from the information provided to us from the question above. 1P + 3L = $6.70 3P + 1L = $9.32 As you can see, we have 2 unknowns. We want ...
*March 23, 2013*

**Maths**

1.5 x 10^8 150 000 000 You start with the 0 on the far right (as that is where the decimal place is) and you see how many times you must shift it over (in this case 8) before the number is greater than or equal to 1 but less than 10.
*March 23, 2013*

**CHEM HELP!!!**

The solubility of AgCl(s) in water at 25 C is 1.33x10^-5 M and its deltaH of solution is 65.7 kJ/mol . What is its solubility at 60.1 C ? Please explain how to solve for this!!
*March 22, 2013*

**Math**

Dr. Jane, couldn't the number 36 also be a possibility as it is greater than 30 but less than 50 and has a 6?
*March 12, 2013*

**Math**

I don't know how you actually found a value :/
*March 12, 2013*

**Math**

Perimeter = S1 + S2 + S3 5x^4-2x^3+x-3= (2x^4 + 2x-1) + (2x^4+2x-1) + base 5x^4-2x^3+x-3 = 2(2x^4 + 2x-1)+ base 5x^4-2x^3+x-3 - 2(2x^4 + 2x-1) = BASE 5x^4-2x^3+x-3 -4x^4-4x+2= BASE 5x^4-4x^4-2x^3-3x-1 = BASE
*March 12, 2013*

**math**

50 people require 4 cups of sugar 1 person will require 4/50 cups of sugar 100 people will require 4/50 x 300 cups of sugar = 24 cups of sugar 6 cups of sugar = 1 bag 1 cup of sugar = 1/6 bag 24 cups of sugar = 1/6 x 24 bag = 4 bags Therefore, 300 people require 4 bags of sugar
*March 12, 2013*

**math**

In order to paint 144 sq feet it will take 45 minutes In order to paint 1 sq foot it will take 45/144 minutes In order to paint 240 sq feet it will take: 45/144 x 240 minutes = 75 minutes
*March 12, 2013*

**math**

x^2-4x+32=0 a =1 b= -4 c= 32 4 +or- sq root (-4)^2 -4(1)(32) 4 +or- sq root 16-128 4 +or- sq root -112 you can't take the sq root of a (-) number so you can't solve this :/ How did you get 2 +or- 2 sqrt7. Perhaps I went wrong somewhere.
*March 12, 2013*

**Algebra**

What exactly is a trend line? I'm thinking it would be B because they're not asking for the exact line. In fact, if it's a scatter plot there wouldn't be a perfect straight line. I think you're right. It's probably B.
*March 12, 2013*

**Algebra**

When x is 1, y is 1.5 When x is 2, y is 2.6 When x is 3, y is 2.2 When x is 4, y is 3 When x is 5, y is 2.9 When x is 6, y is 4.6 When x is 7, y is 4.2 When x is 8, y is 5 The numbers aren't adding up :/ Is what I stated above, correct? A is clearly wrong: ex. y=-2x +1 1.5...
*March 12, 2013*

**Algebra**

Yes, I was also thinking that it seemed too easy.
*March 12, 2013*

**Algebra**

Total # of students = 57 Band students = 25 Band or Choir or Both students = 48 Choir and Math students = 9 So from what you stated in about the Venn diagram, it shows that only 7 students take exactly 2 courses from Mr. Green (Math and Band). So wouldn't it simply be 7 ...
*March 12, 2013*

**maths**

2 right angled triangles = 1 equilateral triangle. You can pretty much split it down the middle and you'll see the 2 triangles from. The formula for a right angle triangle is: (b x h)/2 = area If we were solving for 1/2 the triangle we know that the base is 5 cm, the ...
*March 12, 2013*

**math**

(3 +or- sq.root 361)/2 (3 +or- 19)/2 From here you get the 2 following equations: (3+19)/2 = 11 (3-19)/2 = -8
*March 12, 2013*

**Lang Arts! HELP!**

No problem :D
*March 12, 2013*

**Lang Arts! HELP!**

This is what I think: She clearly has a very motherly character about her as she is a mother. You can see that the children are frightened but she tells them that everything will be OK. I get the sense that she is also frightened by the events that are occurring but she is the...
*March 12, 2013*

**math**

What is the question?
*March 12, 2013*

**Science**

polar
*March 12, 2013*

**MATHS..**

Hi. I tried answering this in a previous post. I'm not entirely sure if I did this correctly but here was my best shot at it: So 3 digit integers would be from 100 to 999. Let's break it up: 1) 100-109 you know that there are 5 #s are odd (101,103,105,107,109) and of ...
*March 12, 2013*

**biology**

You should Google this question. There are many difference as bobpursley has already alluded to.
*March 12, 2013*

**math**

Total # of students = 200 Biology students = 36 Spanish students = 52 Other students = 126 36+52+126 does not even = 200 students total Did you type this question incorrectly?
*March 12, 2013*

**MAths algebra**

1) Day 1: Jog = 3/2 miles Walk = 7/4 miles Rest = 5/2 minutes Walk = 1 mile Day 2: (increase distances + time by 1/3 of that day) Jog = 1 1/3 x 3/2 = 4/3 x 3/2 = 12/6 = 2 miles Walk = 4/3 x 7/4 = 28/12 = 7/3 miles Rest = 4/3 x 5/2 = 10/3 minutes Walk = 4/3 x 1 = 4/3 miles or 1...
*March 12, 2013*

**math**

So 3 digit integers would be from 100 to 999. Let's break it up: 1) 100-109 you know that there are 5 #s are odd (101,103,105,107,109) and of those #s 101 is not distinct therefore their are only 4 distinct odd #s 2) 110-119 you know that none of the #s are distinct (all ...
*March 12, 2013*

**algebra!**

There is probably an easier way to go about doing this but I can't seem to think of it at the moment so you'll have to suffice with this until someone else can answer: I came up with this formula: a x b + 7 = 2027 where a is the the divisor and b is the quotient and 7 ...
*March 11, 2013*

**simple geometry**

I answered this below; refer to your previous question!
*March 11, 2013*

**geometry!**

Assuming the swimming pole is a rectangular prism wouldn't you simply do the following: V = length x width x depth V = 20 x 8 x 3 V = 480 m^3 of water
*March 11, 2013*

**algebra!!!**

I'm not Ms. Sue but I could try to help. Let's create a formula: Let A denote the # of adult tickets Let C denote the # of child tickets Therefore... $13 x A + $11 x C = $179 13A + 11C = 179 So from this point forward, I would ask the following. What # must you ...
*March 11, 2013*

**geometry**

OK. So there are 33 multiples of 3 that are < or = 100. 3,6,9,12,15,18,21,24,27,30,33, 36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99 ect. There are 20 multiples of 5 that are < or = 100. 5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100 The ...
*March 11, 2013*

**geometry**

Sure; post it and I'll give it a go.
*March 11, 2013*

**geometry**

What exactly is the question asking? It would make sense if they were asking the greatest distance between 2 points but asking what shortest distance between 2 points does not make sense. Perhaps I'm not understanding the question properly. If you could expand on what the ...
*March 11, 2013*

**geometry**

Is there a figure that you were given? This question does not make much sense to me.
*March 11, 2013*

**Geometry**

If you can imagine it, the figure will look like a right angle triangle. The hypotenuse will the 20 feet. The base will be 7 feet. The height is the unknown. a^2 + b^2 = c^2 7^2 + b^2 = 20^2 Solve for 'b' and you will get the height of the wall where the ladder reaches.
*March 11, 2013*

**Geometry**

This question has already been answered below. Refer to your previous post!
*March 11, 2013*

**Fluid Imbalances**

The only thing I could really conclude was that perhaps if there is an increase in H+ in the blood then then in order to compensate, K+ might move out of the cells and into the plasma in order to compensate and the H+ would move into the cells? Also acidosis may result in ...
*March 3, 2013*

**Fluid Imbalances**

Why would a person who's blood gasses indicate metabolic acidosis be at risk for hyperkalemia?
*March 3, 2013*

**english**

I would say that summaries save time. They allow the reader to get a gist of what the paper is about without reading the whole thing. They usually outline key themes and characters. Summaries are usually designed to help the reader quickly understand the purpose of the paper/...
*March 2, 2013*

**Health**

I quite certain it is option D. The Affordable Care Act allows some preventative services under an insurance plan/policy and one of those services is diet counselling for people at high risk for chronic diseases.
*March 2, 2013*

**math**

Sub in 44 for n. 75-44+6
*February 25, 2013*

**math**

Did you write out the full question? It seems incomplete.
*February 25, 2013*

**Math Perimeter**

Not entirely sure what this question is asking but if it's asking you to draw any shape with a perimeter of 22 units then essentially you just need to make sure that all the sides of your shape add up to 22. For example. Suppose you wanted to make a rectangle. You could ...
*February 25, 2013*

**math**

Yes. You did this correctly. 2 4/5 as an improper fraction is 14/5.
*February 25, 2013*

**math**

Well let's figure out how many square metres the yard is in order to figure out how many cups of grass seed he will need. A = L x W A = 6 x 7 A = 42 squares metres So the question tells us for every 1 square metre, Elbert uses 1 cup of grass seed. If he has 42 squared ...
*February 25, 2013*

**Math (Simplifying Expressions)**

Let's use BEDMAS (brackets, exponents, division, multiplication, addition, subtraction) 48 ÷ 4 x 5 - 2 x 5 (Since there are no brackets or exponents, let's divide) = 12 x 5 - 2 x 5 (Since there is no more division, let's multiply) = 60-10 (Last thing left to...
*February 25, 2013*

**Algebra**

Now you've got me stumped. I don't understand why it would be option B :/
*February 25, 2013*

**Algebra**

So the area of a triangle is the following: A =( B x H) / 2 Let's plug in what we've been told in the question 24 = (3B x B) / 2 48 = 3B x B 48 = 3B^2 16 = B^2 + or - 4 = B I would go with option C because if you plug in 4 in or -4 for B into the area of a triangle ...
*February 25, 2013*

**Algebra**

You've got me stumped on this one too. I hope you understand why it's option B because I have no idea.
*February 25, 2013*

**Algebra**

I would also go with C because: (-12x)(-12x) = 144x^2 (12x)(12x) = 144x^2
*February 25, 2013*

**math**

Chance of not getting heads: 1) Toss # 1: 1/2 2) Toss # 2: 1/2 3) Toss # 3: 1/2 1/2 * 1/2 * 1/2 = 1/8 So I think the probability would be 1/8.
*February 25, 2013*

**Math**

Formula for area of a triangle is: A = (B x H) / 2 A = (14 x 5.5) / 2 A = ? cm^2 Plug it into a calculator and do the math.
*February 25, 2013*

**math**

15x^2 + 100x + 125 First I would factor out a 5 because I know 5 can go into 15, 100 and 125. 5 (3x^2 + 20x + 25) Now I would factor what is in the brackets. I used the quadratic equation and got the following solutions for x: x= -5 or x= -5/3 Therefore, the final factored ...
*February 25, 2013*

**math**

Times refer to multiplication so whats is 45 multiplied by 2? Can you answer that?
*February 25, 2013*

**math**

So Jay ate 2/15 of 5/8. 'Of' in math refers to multiplication so i think you would simply do the following: 2/15 * 5/8 = 10/120 = 1/12 I'm not 100% sure if I did this correctly. I think someone should verify this.
*February 25, 2013*

**math**

2x = 368 - 4 2x = 364 2x/2 = 364/2 x = 182
*February 25, 2013*

**math**

I think you are correct.
*February 25, 2013*

**English - The Lovely Bones**

I asked this question yesterday but no one has answered thus far so I thought I'd try asking again: If anyone has read The Lovely Bones novel could you please explain 2 things to me. 1) Is Ruth Connors able to see the dead? When she moves to NYC she writes about all the ...
*February 25, 2013*

**math**

Refer to question you posted just before this one. It is very similar and I think you'll be able to complete this one if you refer to the other question for reference. If you still don't understand, let me know and I'll try to get it started for you.
*February 25, 2013*

**math**

I'm going to have you do this question but I'll get you started. What do we already know? Total amount of fencing = 62 feet Width = unknown so let's refer to it by the variable W Length = 2W + 4 (they told us in the question that the length is 2 times the width ...
*February 25, 2013*

**math**

Again, you are going to be using the perimeter formula. The question tells you that the border is 192 inches which means that the total perimeter of this bulletin board is 192 inches. Since it is a bulletin board, I am going to assume that the shape is a rectangle. What do we ...
*February 25, 2013*

**math**

Let's think about this. Fencing goes around the field which means you are essentially trying to figure out the perimeter of the field. What is the formula for perimeter? Perimeter = Length + Width + Length + Width Now plug in your #s and solve.
*February 25, 2013*

**math**

I think you're wanting to put this into the form of y=mx + b. -4x+3y =-7 3y= -7 +4x y = 4/3x - 7/3
*February 25, 2013*

**math**

What are you trying to solve for? You have 2 unknowns.
*February 25, 2013*

**Math**

I'm assuming by function form you mean the form of y=mx + b. 2y + 5x = 12 So if we want to put this into function form, we want to isolate y. 2y + 5x = 12 2y + 5x - 5x = 12 2y = 12 - 5x y = -5/2x + 6
*February 25, 2013*

**Math!!**

your*
*February 24, 2013*

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