Friday

April 18, 2014

April 18, 2014

Total # Posts: 756

**Physics**

help!!!

**Physics 121**

Please do show you did it and which formula did you use. Thanks very much.

**Physics 121**

The pulley has an inner radius of 0.35m and an outer radius of 0.65m. It has a mass of 1.8kg. A string wrapped around the inner part of the pulley is fastened to the ceiling. A second string wrapped around the outer part of the pulley is fastened to a block. Determine the mass...

**language arts **

I have an assignment where it says to write a sonnet with 14 lines but they also say to have 14 syllables per line. I thought it was 10 syllables per line. Can anyone help ?

**Algebra**

Will you explain the concept of "i" in algebra? Problem: 4+2i/4-2i

**Chemistry **

Enough of a monoprotic acid is dissolved in water to produce a 0.0169 M solution. The pH of the resulting solution is 2.68. Calculate the Ka for the acid.

**Chemistry help**

A substance with pH of 3 is 10 times as Acidic as a substance with a pH of 4. *****or******* A substance with a pH 3 is twice as acidic as a substance with a pH of 4.

**Chemistry**

1. Balance the equation. 2. mols NaOH = M x L = ? 3. Convert mols NaOH to mols H2SO4. 4. M H2SO4 = moles H2SO4/L H2SO4. 5. 2 moles I believe

**Chemistry**

NaOH+H2SO4-> H2o+Na2SO4? How many moles of NaOH required to neutralize 1 mole H2SO4?

**Chemistry**

Which of the following is correct? A)A substance with pH of 3 is 10 times as Acidic as a substance with a pH of 4. B)A substance with a pH 3 is twice as acidic as a substance with a pH of 4.

**Science**

25 cm of 1.0 mol dm− NaOH is added to 25 cm of 1.0 mol dm− HCl. The temperature rise is 6¢XC. Which reactants will also give a temperature rise of 6¢XC? A. 25 cm of 2.0 mol dm− NaOH and 25 cm of 2.0 mol dm− HCl. B. 50 cm of 1.0 mol dm− N...

**Chemistry**

25 cm of 1.0 mol dm− NaOH is added to 25 cm of 1.0 mol dm− HCl. The temperature rise is 6¢XC. Which reactants will also give a temperature rise of 6¢XC? A. 25 cm of 2.0 mol dm− NaOH and 25 cm of 2.0 mol dm− HCl. B. 50 cm of 1.0 mol dm− N...

**Chemistry**

How do you convert Ounces to Grams longhand?

**Statistics**

A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about their attitudes. T...

**math**

x over 5,2x over 15,3x over 45,12 over 135 Find the value of x in the above sequence

**algebra**

6) Write with positive exponents: [ 3-3 a-2 b5 c-3 d-4]

**algebra**

6) Write with positive exponents: [ 3-3 a-2 b5 c-3 d-4]

**Science/geology **

Why does the Red River flow north, and the Mississippi River flow south?? I think it has something to do with elevation.. but I'm not sure.

**Science/geology**

@ Ms.Sue. I know the map directions have to influence on how the river flows... that's not what I'm asking.

**Science/geology **

Why does the Red River flow north, and the Mississippi River flow south??

**math**

In the annual walkathon, Lee jogs for 5 3/4 miles more than he walks. If he travelled a total of 15 miles, how many miles did he walk

**Math**

Find the smallest values of a and such that 32a = 23b.

**science**

A force of 2000N is used to push a box up an inclined plane that is 5m long. If the 100 kg box is raised to a height of 8m, how much work is done against friction? Let g equal 10 m/s2; I need to know how to set the problem up

**physics**

a force of 625 N is used to move an object with 1000N resistance up inclined plane of 2.0 m.What is the length of the inclined plane

**physics**

Calculate the height of the brain above the heart for an animal with an additional blood pressure of 498 mmHg in the heart. Use ρ = 1.057 g/cm3 for the density of blood. ???????

**spanish**

¡Gracias, Senora! Usted siempre es tan amable en ayudarnos.

**spanish**

Thank you--I am sorry for the confusion! Actually the assignment is a bit confusing as to what the end product should be. I am to summarize an actual conversation. I interviewed a friend about her plans for after she finishes school this May. Then I need to write it up but in ...

**spanish**

I want to write sentences about asking people questions. The questions have to do with the future, so in some sense I guess they are hypothetical. I want to know if that means that I use the (imperfect) subjunctive as hypotheticals--I think so, but I want to make sure. For exa...

**Math**

A box contains 3 red marbles, 6 blue marbles, and 1 white marble. The marbles are selected at random, one at a time, and are not replaced. Find the probability. P(red and white) Please help me

**Algebra**

I know that I'm suppose to find the y, but I don't know how.

**Algebra **

Find the value of y so that the line passing through the two point has the given slope. (2,y) (4,5) m=5 (m=slope) how do you do this?

**History**

Lauren- yes she answered my first one, the questions are different if you read them carefully.

**History**

How did the writing/poetry influence people in the harlem renaissance?

**History**

Why was the harlem renaissance important for poets and writers?

**college algebra**

Thanks anyway, I found the answer, the -1 is to be multiplied across ALL factors including the numbers on the other side of the =. See ya

**college algebra**

In a radical equation if the negative symbol is in front of the radical should I use -1 to factor out the negative power? And if so do I factor across the = doing BOTH sides? Or just the side the radical is on? Thanks anyone, I've been out of school for 12 years so it is a...

**algebra**

WHAT COULD YOU DO TO THE EQUATION 4xY=32 TO KEEP BOTH SIDES EVEN

**Calculus**

Thanks

**Calculus**

Evaluate the indefinite integral integral sec(t/2) dt= a)ln |sec t +tan t| +C b)ln |sec (t/2) +tan (t/2)| +C c)2tan^2 (t/2)+C d)2ln cos(t/2) +C e)2ln |sec (t/2)+tan (t/2)| +C

**Calculus**

Evaluate the indefinite integral ¡Ò(x-2)^3/x^2 dx

**Calculus**

integration-indefinite Evaluate ¡Ò dx/3(2x-1)^2

**Calculus**

thanks

**Calculus**

The population of a county increases at a rate proportional to the existing population. If the population doubles in 20 years, then the factor of probability is a) 2e^(-30) b)1/2(ln 20) c)ln 2 d)1/20(ln 2) e)ln 20

**Calculus**

Evaluate the indefinite integral

**Calculus**

Evaluate£º ¡Ò dy/(rad£¨4-y^2))=

**Calculus**

Evaluate the indefinite integral

**Calculus**

evaluate ¡Ò (Ln rad(x)) /x dx=

**Calculus**

Thanks

**Calculus**

Evaluate integral sign (x-1/(2x))^2 dx=

**geometry**

Thank you

**maths**

A company hires skilled employees, each working under contract to 35h and paid € 550 a week, others working under contract B 20h and paid € 220 per week. 1. These employees will have to make a total of 370h of work per week and the entrepreneur has a Bugdet weekly &#...

**physics**

idk

**Math**

Well I got 73.26 but my teacher said not to do it on the calculator.

**Math**

Would 75 be right.

**Math**

Please help ms on this problem 74% of 99

**math**

75+85+90+x/4=85 250+x/4=85 250+x= 340 x=90

**math**

81,__63,__,45,__ 81,72,63,54,45

**algebra**

37.051 is 55.3% of what number. x*.553=37.051 x=37.051/.553 x=67

**Ethical Decision Making Case Study**

This subject interested me so I went to Columbia University's website and found that a physician must notify a health agent and that agent must notify the patient's contacts which would include Paula's friend. I am not sure if this is a universal policy but I thoug...

**Math**

If you keep using fake names maybe you will get fake answers.

**ALGEBRA**

To figure out the down payment percentage multiply dollar amount by decimal for percent. For example 10% is .10 20% is .20 5% is .05 etc. Then to figure out the amount to be financed subtract the down payment from the original amount. Does this help?

**chemistry**

That is what I figured it out to be.

**math **

PT + 3PT=108 4PT=108 PT=27 FT=108-27=81 27 part-time and 81 full-time

** science**

16+16+12+12=56m

**Science**

That's what I get.

**chemistry**

Sorry misunderstood, I thought in was "in" not inches assumed it was mm.

**chemistry**

This is what I get: 25.7 mmHg x (101.325 kPa/760.0 mmHg) The mmHg cancel each other out So 98.659 kPa

**Math help plz**

Add 3 3/4 to 4 3/4 if it equals 8 you are right

**Math**

No, that isn’t right. Parameter of a rectangle is the sum of 4 sides with opposite sides equal. If width is 4, both sides would be 8. Subtract 8 from 24 to get sum of other two equal sides, which is 16, divided by two would be 8. The length is 8 units.

**stati**

80% finish high school 40% finish college 8% get master’s 2.4% get PhD

**3rd grade math 1**

As+Ls=2100 Ls=large spider as=average sized spider Ls=20As so as+20as=2100 21as=2100 as=100 The average sized spider lays 100 eggs at one time

**math**

S+5s+s-6=50 S+5s+s=56 7s=56 S=8 So Paula saw 8 spiders, 40 beetles, and 2 caterpillars

**english**

You're welcome.

**english**

This is how I would word it: It was filled with lies, corruption, and betrayal keeping me at the edge of my seat.

**math**

Look over other solution and see if you can figure this one out now.

**math**

In this equation, a=3, b=-5, c=-11 {- b + sqrt(b^2 - 4ac)} / {2a} and {- b - sqrt(b^2 - 4ac)} / {2a} 2.92 and -1.25

**Psychology Please Help!!!!**

I believe the answer is d. because Billy Sue's grandmother believes girls should wear lacy pink dresses because in her culture that is how little girls should look.

**math**

Approximate

**ENGLISH-HELP!!!!**

Losing the Brace: The Straight Road Back

**computers**

Yes, I believe C is correct.

**Math**

I am assuming it is a plane that left at 7:00. (7:00)-(1.5 hrs check-in)-(1hr drive from house)=4:30

**ALGEBRA**

Yes, r=.075 x $900 = interest is $67.50 *************************************** r=.075 P=900 1 yr P+rP or P(1+r) or 900(1+.075) = $967.50 2 yr (P+rP) + r(P+rP) or P(1+r)^2 or 900(1+.075)^2 = $1040.06 in 2 years So for future years the formula would be P(1+r)^x where x=number ...

**algebra**

A. Right. 28 wins out of 54 games 28/54=.52 or 52% so 108 games left and 52% of 108 is 56 wins projected plus 28 already won so 84 wins at end of the season. B. You are right 28/54 but answer 0.51851 to nearest tenth is 51.9% C. Projected wins for the season is 84 and 84 out o...

**essay**

I hope this is what you are looking for: Discuss the acting of both movies, say what you liked about one and why you didn't like that about the other. Say what one movie had that the other didn't, good or bad. You might prefer the acting of one movie but the music of t...

**MATH**

1/20 x 4 = 1/5

**MATH**

2/3 div 3/5 2/3 x 5/3 = 10/9 = 1 1/9

**Math**

1. 5 5/6 x 2 4/5 = 16 35/6 x 14/5= 49/3 = 16 1/3 2. 2/3 divided 3/5 = 1 1/9 or 2/5? 2/3 x 5/3 = 10/9 = 1 1/9 3. 7/12 divided 2/3 = 7/8 7/12 x 3/2 = 21/24 = 7/8 4. 3 1/2 divided 3/4 = 4 2/3 or 2 5/7 7/2 x 4/3 = 28/6 = 4 2/3 5. 4 2/3 divided 7 = 2/3 14/3 x 1/7 = 14/21 = 2/3 6. 4...

**math**

8m x 2 m =16m sq P=8+2+8+2=20m

**Math problem**

P+C=R C=R-P

**Math**

1. 2 1/3 x 3 1/2 7/3 x 7/2 49/6 = 8 1/6 2. 4 2/3 divided 7 = 14/3 x 1/7 = 14/21 = 2/3

**Math**

a=.50e m=.50(.50e)=.25e u=20,000 e=20,000+.25e+.50e e-.25e-.5e=20000 .25e=20000 e=80000 Total estate was 80,000

**ALGEBRA**

65/100 had iPhones of those 65-30 had car too so 35 only had iPhone 40/100 had cars of those 40-30 had iPhone too so 10 only had car 35 + 10 = 45 only had iPhone OR car

**algebra**

Figure out how many feet in a mile we will call that x figure out how many seconds in an hour we will call that y 20y=how many feet in an hour and divide by x that will give you mph

**maths **

You find two numbers whos product is your surd. Trying to get one factor to be the square of a number. For example if you want to simplify a surd of 75 you would choose 25x3. you write it by using square root symbol(srs) in front of (25x3)= srs 25x srs 3 which equals 5x(srs)3 ...

**Pre-Calculus**

Thank you. You helped greatly.

**Pre-Calculus**

I'm having a had time with this problem. Could you please help with step by step resolution? e^-x / e^-1 + 3 dx Thank you..

**math**

A negative sign outside of parenthesis is telling you to multiply by -1 which makes positive numbers negative and negative numbers positive. So -y+25

**math**

Company A $5+$1 per pound Company B $3 + 1.50 per pound 27. 3+1.50x=5+1x 1.50x=2+x .50x=2 X=4 28. 6 lb package with company a $5+($1x6)=$11 6lb package with company b $3+($1.50x6)=$3+$9=$12 Company A charges less. You save $1

**math**

Can't illustrate in Jiskha. Should look like 7 red cubes then 3 blue cubes in a line.

**math**

Need the width

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