Friday

September 30, 2016
Number of results: 121,820

**algebra check please**

help i am stuck : -8 - 5y = 12 - 9y i got: -8-12 -5y = 12-12 - 9y -20 - 5y = 9y -20 +20 - 5y - 9y im so stuck idont understand this one can you please help me

*October 1, 2012 by marko *

**Physics**

The displacement of an object in SHM is given by y(t) = (7.1 cm)sin[(1.64 rad/s)t]. What is the frequency of the oscillations in Hz? I'm completely stuck here. I was thinking that frequency = 1/t. I'm stuck with the information given. Please help!

*March 22, 2010 by Angie*

**algebra 117b**

I am really stuck if you could me please with this problem y=kxto find yfor x=6 y=-65when x=9 -65=k.9 k=- this is where I get stuck

*July 17, 2012 by BERNIE*

**Physics Lab**

Can someone please help me? I need some ideas, I am totally stuck...I posted as the same name as I am now! Please! thanks

*September 14, 2007 by Meredith*

**I'm stuck- please help**

Hi everyone, I've been stuck on this question. Please anyone help. Show step by step and answers. Thank you. - Determine the quarter point of y=−cos(2x−π) THANK YOU.

*August 3, 2016 by chichi*

**math**

i am having a minor difficulty i've been stuck for over an hour and don't know what to do i dont know is this right ? = "+" or "-" # = number y=3 (x-3)^2 + (y-4)^2 = 9 i substitute y (x-3)^2 + (3-4)^2 = 9 (x-3)^2 + 1 = 9 x^2 - 6x + 9 + 1 = 9 x^2 - 6x + 10 = 9 x^2 - 6x + 1 = 0...

*February 24, 2010 by larry*

**re:math**

i am having a minor difficulty i've been stuck for over an hour and don't know what to do i dont know is this right ? = "+" or "-" # = number y=3 (x-3)^2 + (y-4)^2 = 9 i substitute y (x-3)^2 + (3-4)^2 = 9 (x-3)^2 + 1 = 9 x^2 - 6x + 9 + 1 = 9 x^2 - 6x + 10 = 9 x^2 - 6x + 1 = 0...

*February 24, 2010 by larry*

**Algebra-Please help me!**

Hi, I'm totally stuck! Problem: sqrt(x-3) = sqrt (2) -sqrt(x) I know I square them to get them out of square roots but after that I'm stuck- answers: -25/8 25/8 no solution 1/8 Please show me how its done Thank you

*October 12, 2010 by Michelle*

**chemistry**

now am stuck on how to find the grams of X+Y=1.10 X for glucose and Y for sucrose i had 3.78=M0.08206*298 3.78/24.45=0.1546M 0.1546*0.025=0.003865 moles. now am stuck. help please

*January 24, 2010 by bf*

**Algebra-Pleasehelp-I'm so stuck!!**

Please help How do you graph the radical that is below negative of the sqrt(x+1) my teacher said we should set up x and y according to parent function. The endpoint of this would be (-1,0) How do I find the other points-I'm really stuck

*October 11, 2010 by Julia*

**Physics**

Your car is stuck in the mud and two friends are helping you. One is pulling on your car with a force of 370 N at a 40 degree angle and the other is pulling with a force of 450 N at a 30 degree angle. A force of 725 N is required to remove the car. Is the car still stuck? ...

*October 29, 2010 by Anna*

**Algebra **

I have about 3 homework problem that I am stuck on! please help me. #1: The area of a rectangle is 16, and its diagonal is \sqrt{68}. Find its dimensions and perimeter. (x^2)+(y^2)=\sqrt{68} (x^2)+(y^2)=8.246 xy=16 y=16/x (x^2)+(16/x)^2=8.246 (x^4)+(96/x)=8.246 Then I got ...

*June 2, 2014 by Anonymous*

**English- A Raisin in the Sun**

I'm stuck on these in A Raisin in the Sun: Why does Mama decide not to move? In what way does she show herself to be stronger than her children? I'm stuck, please help!

*September 1, 2007 by Anonymous*

**AlgebraII-Reiny could you please check-I'm stuck**

Sikve the following by using substitution method x=3y -5 6x-18y = -30 I got this far and I'm stuck 6(3y-5) - 18y = -30 18y - 30 - 18y = -30 -30 = -30 So this doesn't make sense anymore

*February 14, 2011 by JuliaAnne*

**geography**

I'm really stuck on my homework it says Geography can be divided into tree strands, phisical, human and enviromental. Explain what it means in your own words. I'm really stuck so could you help me please!!!!!!!!!!!!!!

*September 8, 2008 by Emily*

**Economics**

Ive been stuck on this forever now if someone could please walk me through it i was appreciate it: 1: Suppose John had a utility function of U=X^2/3Y^1/3 . Derive Johns demand function from his utility function showing all the necessary steps. i know that the MUx=MUy and first...

*September 18, 2007 by Brett*

**Pre-Calculus/Trig Check please and help**

Could someone please check the first one and help me with the second one. I'm stuck-Thank you 1.What are theroots of the following polynomial equation? (x+2i)(x-5)(x-2i)(x+8) = 0 I think the roots are -2i,5,2i,-8-you take out the roots as opposites of what are in the equaion ...

*September 5, 2011 by Tabitha*

**physics science**

Please can you help as I am stuck, Describe ib detail, how you would carry out an investigation to measure the density of a block of aluminium? Thankyou

*January 31, 2012 by chloe*

**physics science**

Please can you help as I am stuck, Describe ib detail, how you would carry out an investigation to measure the density of a block of aluminium? Thankyou

*January 31, 2012 by chloe*

**Physics-Please check calculations**

I posted this earler and you gave me help, could you please check what I did? Thank you If a car drives off a 40 m high cliff with a horizontal velocity of 15 m/s, how far from the base of the cliff will the car strike the ground? Could someone help with the equation, please ...

*January 2, 2011 by JessieLynne*

**math**

i am having a minor difficulty i've been stuck for over an hour and don't know what to do i dont know is this right ? = "+" or "-" # = number y=x (x+1)squared + (y+1)squared = 6 i substitute y (x+1)squared + (x+1)squared = 6 x squared + 2x + 1 + x squared + 2x + 1 = 6 2x ...

*February 23, 2010 by larry*

**Technology**

A watchmaker would work with _____ measurements. a. standard b. precision c. indirect d. Swiss I'm a little confused on this question. I dont think it's A or D. I'm stuck between B and C, but I think it's C-indirect. Is there any tutor that is good in technology? Please help ...

*December 21, 2009 by y912f*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile with ...

*October 11, 2013 by Sarah*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile with ...

*October 11, 2013 by Sarah*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile with ...

*October 11, 2013 by Sarah*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile with ...

*October 11, 2013 by Sarah*

**History-PLEASE HELP**

I am stuck on a homework assignment and am having a hard time finding information on this topic. Can someone please please help!! Why is Kenneth Clark’s interpretation of the African mask ethnocentric?

*February 11, 2010 by Joe*

**PHYSICS**

Find the mass of water that vaporizes when 4.04 kg of mercury at 210 °C is added to 0.498 kg of water at 81.6 °C. I am stuck on trying to figure out how to solve this. Please help!

*May 20, 2015 by KS*

**Physics**

The length of a box is reduced to two third of its original value and the width and height are tripled. Calculate the factor by which the volume has changed. Am I on the right track? If not please help I am stuck. Thanks. V=LWH V=(L-2/3)(3W)(3H)

*June 4, 2014 by Jane*

**Chemistry**

Please help me with this chemistry question? I am working on a lab report and I am stuck on this question: Use the concept of stoichiometry to explain why balanaced equations are necessary when performing calculations in chemistry. Propose a situation where precise amounts of ...

*September 8, 2009 by Jessie*

**Quantum Physics**

Has anyone done Block 7-8 for TMA 6 for s103 - discovering Science, as i am struggling big time, any help would be much appreciated yes i am like you really phased by this how much of the tma have you managed to do Me, too what r u stuck on? I have been doing really well but ...

*February 27, 2007 by Adam*

**College Algebra ..Please help**

I have about 5 homework problem that I am stuck on! please help me. The first of 5 is: A rectangular garden is 20 ft longer than it is wide. Its area is 8000 ft{}^2. What are its dimensions? Im not even sure where to start with this one. Next #2: The area of a rectangle is 16...

*June 2, 2014 by Anonymous*

**Physics**

Last question i'm stuck on please help me through this. Five waves pass a dock in 2.0 s. If the waves are traveling at 10.0 m/s, then what is the wavelength of the waves?

*April 14, 2014 by Me and I*

**physics**

Dynamics question please help i am stuck...! A model helicopter of mass 5.0 kg rises with constant acceleration from rest to a height of 60 m in 10 seconds. Find the thrust exerted by the rotor blades during the ascent

*June 13, 2010 by Jinx007*

**Math SOmeone please please help**

Find the derivative of the function. g(u) = (5+u^2)^5(3-9u^2)^8 Could someone please explain the steps that would lead me to the answer? I'm completely stuck.

*February 21, 2011 by Anonymous*

**Math (please please please help!)**

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

*April 5, 2011 by Rosie*

**college**

Please help. I'm stuck. Solve: 20/5p+3/5q-6/5p+14/5q Please show me the steps. Thank you

*January 14, 2009 by Momsbubs*

**physics (Newton's Laws)**

Please help, A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. Instead you set up a pulley system. A rope (consider it massless) runs from the seat you sit on over an ideal pulley...

*March 17, 2013 by Kathy*

**Life Orientation**

Hi I am a matric learner and I am having trouble with an lo portfolio assignment. it is about environmental issues and im stuck. I need to identify and describe 3 environmental health hazards that cause ill health, accidents, crisis and disasters within my community or any ...

*May 1, 2013 by Ashley*

**Algebra**

Please help-What is the equation of the ellipse with foci (0,6), (0,-6) and co-vertices (2,0),(-2,0) Please explain the steps because I have 5 to do for homework-Thank you-I'm really stuck on this

*May 12, 2011 by Jodi*

**Algebra II-Please check**

Please help-What is the equation of the ellipse with foci (0,6), (0,-6) and co-vertices (2,0),(-2,0) Please explain the steps because I have 5 to do for homework-Thank you-I'm really stuck on this I thought the answer would be x^2/4 + y^2/40 = 1 but that can't be because the ...

*May 13, 2011 by Jodi*

**Algebra II Please check-**

Please help-What is the equation of the ellipse with foci (0,6), (0,-6) and co-vertices (2,0),(-2,0) Please explain the steps because I have 5 to do for homework-Thank you-I'm really stuck on this I thought the answer would be x^2/4 + y^2/40 = 1 but that can't be because the ...

*May 13, 2011 by Jodi*

**11th grade physics**

my physics teacher asked the class to find a cool physics topic and write a summary and a reflection on it 1page.... any ideas im really stuck

*October 5, 2008 by JESSICA!!!!!!!!!!!!!!!!!*

**Integral calculus**

Hello, this is the last question from my homework that I get stuck at: ∫ (5^3/x - (x^8 + 9)^1/3 ) / 3x^2 will u, for sub. be = x^8 + 9? Then du is = 8x^7 dx x^7 dx = 1/8 du from there I'm stuck. Thank you

*April 19, 2012 by Tommy*

**Grade 12 Physics**

CAN SOMEONE PLEASE HELP ME WITH MY QUESTION I AM REALLY STUCK!!!!! SOMEONE ANYONE!! I need some help, my brain hurts already just over analyzing this question! [_] [_]Thanks! [_]

*September 12, 2007 by Haley*

**Algebra**

I am trying to find the equation to m= 8(3,2)This is what I did and then I get stuck, sorry m=8(3,2) y=2(8)(x-3) y=2x-? this is where I get stuck -24 or -5

*September 6, 2010 by Ziggy*

**Physics**

Help me please I'm stuck on this question 2.In a thunderstorm at 20.0°C, Karen sees a bolt of lightning and hears the thunderclap 3.00 s later. How far from Karen did the lightning strike? Show your work.

*April 14, 2014 by Me and I*

**PHYSICS!!!!! HELP!**

The velocity of a diver just before hitting the water is -8.6 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 0.86 s of the dive? im so stuck. i tried this problem several times, and my answers werent correct. ...

*September 28, 2010 by mikey*

**prealgebra**

IM stuck on a question. PLease help. A teacher is giving candy to his periods. First period gets 1/3 and 2nd period gets 1/4 and 3rd period gets 1/3 and finally 4th period gets 22 pieces. How many pieces did each period get? Im stuck!!

*August 31, 2011 by randy*

**Physics, help please!**

A hypothetical spherical planet consists entirely of iron (p=7860 kg/m^3). Calclate the period of a satellite that orbits just above its surface. I started out with the pressure formula P=M/V, but i kept subbing in other formulas, but i get stuck..can someone help me? thanks.

*March 2, 2010 by ALan*

**physics**

A 5.88 g bullet is fired vertically into a 0.9 kg block of wood. The bullet gets stuck in the block, and the impact lifts the block 0.87 m up. (That is, the block — with the bullet stuck in it — rises 0.87 m up above its initial position, and then falls back down.) Given g = 9...

*August 9, 2011 by James*

**Algebra II**

Please help-I'm totally lost- What is the equation of the ellipse with foci(-10,0), (10,0) and co-vertices (0,-3),(0,3) x^2/109 + y^2/9 = 1 X62/100 + y^2/9 = 1 Please show me the steps because I have others to do and I'm really stuck

*March 28, 2011 by Shiela*

**Maths**

keep getting stuck for integrate e^(bx) cos x i get = cos x e^bx/b - int -sin x e^bx/b = cos x e^bx/b - -sin x e^bx/b^2 - int - cos x e^bx/b^2 this is where i get stuck please help

*November 21, 2009 by Amelia*

**algebraII**

3b-2/b+1=4-b+2/b-1 please help me I'm stuck

*April 28, 2008 by brit*

**math**

(5)/(x) - (2)/(x-3) = 0 5(x-3) - 2(x) = x(x-3) 5x-15-2x = x^2 -3x 3x-15 = x^2 -3x this is where i get stuck please help thanks

*October 31, 2010 by peter*

**physics 12**

im stuck i have no clue where to start, please help me i just know the givens and some claculations. question: kevin stands on he top of a buiulding and he throws an aboject up into the air at a velocity of 16.0m/s at an angle of 25 degrees to the horizontal. if the building ...

*August 8, 2010 by priya*

**Chemistry **

Please please help me on this equation I'm stuck and your steps are confusing. Calculate the concentrations of each ion remaining in solution after precipitation is complete. (Enter a 0 if none of the ion remains.) Cl ‾ Ca2+ I have Ag+=0 and NO3^-3= 0.13 but I can't seem...

*June 21, 2013 by Ashley*

**PHYSICS-stuck**

These are the troublesome questions. What is the average velocity between 0.6 h and 1 h? A. + 0.4 km/h B. + 1.25 km/h C. + 1.66 km/h D. + 2.5 km/h The other question is below. What is the object's displacemnt between 0.4 h and 0.6 h? A. -0.75 km B. +0.25 km C. +0.75 km D. +1.0...

*July 21, 2010 by Anonymous*

**physics- please respond**

A 16kg sled starts up a 28 degree incline with a speed of 2.4m/s . The coefficient of kinetic friction is = 0.27. part a)How far up the incline does the sled travel? part b)What condition must you put on the coefficient of static friction if the sled is not to get stuck at the...

*May 24, 2012 by julie*

**physics- please respond**

A 16kg sled starts up a 28 degree incline with a speed of 2.4m/s . The coefficient of kinetic friction is = 0.27. part a)How far up the incline does the sled travel? part b)What condition must you put on the coefficient of static friction if the sled is not to get stuck at the...

*May 25, 2012 by julie*

**Math, please please help**

The base length of each square-based prism in the pedestal design is 3cm less than that of the layer immediately below. a) Write an algebraic expression for the total of the top surface areas of the three prisms used to make the pedestal. x x x 2x+5 2x+5 Please help, i am so ...

*March 25, 2008 by Amanda*

**Physics**

Heyy is anybdy good at physics I am stuck on this question ... ... A camper van with a mass of 2500 kg has a maximum driving force of 2650 N. The camper van drives along a straight road at a constant speed of 90 kilomatres per hour. At this speed, air resistance is 2000 N and ...

*September 9, 2011 by Robyn*

**Precalculus**

please still stuck h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 7 2 3 2 6 8 8 0

*April 26, 2010 by Kate*

**Calculus**

Stuck on this problem. Please help! 1+u^4/u du

*December 11, 2011 by Stacy*

**Algebra Divide**

x^8+x^5/x Please help im stuck

*June 7, 2012 by Adriana*

**Earth Science**

Why is the Colorado river in central nevada not part of a larger river system? Please help!! i am stuck in this quetion. Please help!!!!!!

*February 9, 2009 by amanda*

**Math**

I am stuck on a problem that has to do with the double angle formulas. I have to solve this: 4sinxcosx = 1. I tried using the formula 2sinu = 2sinucosu by substituting it in like this: 2(2sinxcosx)= 1 but then I am stuck

*December 6, 2010 by kathleen*

**math - ans.check**

Given function G(x)=-7/8(45-x), find x to nearest tenth, when G(x)=15 ____________________________________ I'm stuck on this question,i tries on my own but i couldn't get it right, plz help! 15=-7/8(45-x) -8/7(15)=45-x (-17.1428..)=45-x -> stuck at this step. Thank You!

*February 17, 2015 by troy*

**Help Please - Science**

I'm stuck on this thing in science. It's a lab report so its kinda hard to explain. We did a topographic map experiment. We had a big rock, and put it in a plastic bin. We then marked centimeters on the bin and filled water to the first centimeter. We drew the water line on an...

*November 13, 2007 by Alex*

**math**

y=5x-7 and -3x-2y=-12 I have to find the linear system using substitution I have gotten it to -3x-2(5x-7)=-12 Now I am stuck at solving for x PLEASE HELP any way you can Thanks Oh, and please show me how you did it as well :)

*May 28, 2009 by Elissa*

**Can anyone please help me this biology please !!!**

I am really stuck in this biology it super hard how do yeast cells benefit from fermentation ?I wil be happy if anyone would help me out thanks.

*December 13, 2012 by Justin *

**Algebra**

Simplify: 6t^3/t^2 - 12t/2t I'm stuck, please help!! : (

*February 10, 2010 by Nadia Samim*

**math**

Stuck on solving this inequality, help please. 3X le 15 and 2x gt -6

*February 10, 2011 by marco*

**math**

4x7-9^4= please help me im super stuck

*January 14, 2014 by joey*

**math**

simplify (9-m^2)7m^3 / (3-m)14m please help i am stuck

*March 29, 2015 by dev*

**2nd time posting bc i still need HELP! PHYSICS!!!!**

The velocity of a diver just before hitting the water is -8.6 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 0.86 s of the dive? im so stuck. i tried this problem several times, and my answers werent correct...

*September 29, 2010 by MC*

**grade 10 math**

im stuck in this question,i tried everything but i failed... can u please help me. find two numbers whose sum is 32 and whose product is a maximum. please help me!!!

*November 24, 2009 by Sameul*

**algebra**

(2-x)/(2x+6)+ x/(x^2-9) Can some one please help solve this one because I stuck? I don't know how to sole this, so please somebody help!!

*September 11, 2010 by jessica*

**MATH**

Hi, I really need help with these questions. I did some of them halfway, but then I got stuck. Would you please help me? Thank you so much. Prove the identity.... 1. sec x + tan x(1-sin x/cos x)=1 1/cos x + sin x/cos x(cos^2 x/cos x)=1 1+sin x/cos x(cos^2x/cos x)=1 I got stuck...

*January 2, 2014 by LIZZIE010*

**Pre-Calc-Please check my answer**

Please help-I'm stuck really bad Thank you for any help you can provide What are the roots of the equation x^2 -4x + 3 = 0 x^2 - 4x = 3 x^2 +2(-2)x + -2^2 = -3 = -2^2 x^2 + -4x + 4 = 1 (x + -2)^2 = 1 qrt (x+-2)^2 = sqrt 1 x+-2 = plus or minus 1 therefore x=1 x=3 roots are 1 ...

*September 6, 2011 by Sheila*

**Physics**

if a ball is thrown vertically into the air, leaving the ground at a height of 1.8m, with a speed of 9.7m s -1. When it rises and falls to the ground what will the balls speed be as it hits the ground? please help with an explanation as i am so stuck, my exam is in two days ...

*December 6, 2010 by Rebecca Niles*

**physics**

A tightly stretched "high wire" is 44 m long. It sags 3.8 m when a 56 kg tightrope walker stands at its center. What is the tension in the wire? 1 NIs it possible to increase the tension in the wire so that there is no sag? so far i know you do the inverse sin of (3.8/22) to ...

*January 9, 2011 by Haley*

**Technology**

What is carbon "footprint", please describe it. I am stuck.

*June 3, 2008 by Sarah*

**Intermediate Algebra**

Solve: 2x^-2 - 5x^-1 - 3 = 0 2a^2 -5a - 3 = 0 (2a^2 - ) + ( a - ) = 0 I am stuck here please help.

*December 3, 2008 by Jennifer*

**algebra**

Helpme solve this please i am really stuck x+3y=8 x=4-3y

*January 9, 2010 by anna*

**algebra**

Please help me factor this by grouping. I am stuck. 7x^3-35x^2-6x+30

*July 19, 2010 by Joe*

**math **

still stuck on simplififying 3x^3+5x^5...please assist

*December 31, 2010 by Margaret*

**Math**

I'm stuck on solving this one. If I could get some help please. -6 le x/2 - 4 lt -3

*February 11, 2011 by marco*

**pre algebra**

11 - 8 ÷ (1/3 + 1/5) Please show work I am stuck. Thank you

*June 17, 2012 by toni*

**algebra**

I need help solving this equation. 7y+5/3 = -8/y-3. I am stuck. please help me.

*June 26, 2014 by Maria*

**math**

what is the procedure for solving the equation 1/2x = 16. I am stuck. Please help me.

*April 9, 2015 by Jay*

**math**

394 cars, 57 trucks, and 23 buses ventured out in the snowstorm. 83 1/3% got stuck in the snow. How many vehicles got stuck?

*May 16, 2010 by Kriztin*

**Physics**

A small plane takes off with a constant speed of 130 km/h at an angle of 37 degrees. In 3.00 s, how high is the plane and what horizontal distance has it traveled from the lift-off point. I know I should convert 130km/h into meters per second, but after that I am stuck. Can ...

*November 29, 2007 by Emma*

**Physics STUCK!**

A point on the A string of a guitar oscillates in approximately simple harmonic motion with a frequency of 113 Hz and an amplitude of 1.04 mm. Find the maximum speed and acceleration of this point. SOLVE FOR: vmax = amax Can you please provide me with the equation as well as ...

*January 24, 2013 by High School STUDENT*

**Physics 12 Review**

End of the semester, working on the final review... I have a couple of questions I am stuck on right now. My notes on these questions seem to have vanished into the void... 1. "A 2.0kg puck travelling due east at 2.5m/s collides with a 1.0kg puck travelling due south at 3.0m/...

*January 23, 2009 by solexgirl12*

**PHYSICS - please help!!!**

In the product F = qv · B , take q = 4, v = 2.0i + 4.0j + 6.0k and F= 136i -176j + 72k. What then is in unit-vector notation if Bx = By? I still can't get the right answer though... I am stuck here: 136i-176j+72k=(8i+16j+24k)x(Bxi+Byj+bzk) How do I solve for Bxi + Byj + Bzk...

*March 29, 2007 by sam*

**Physics**

During an action potential, Na^+ ions move into the cell at a rate of about 3x10^-7 mol/m^2*s. How much power must be produced by the "active Na^+ pumping" system to produce this flow against a +30-mV potential difference? Assume that the axon is 40cm long and 30um in diameter...

*February 12, 2013 by John*

**science**

please could someone help me with these question please i have loked on websites but i am still stuck. true or false and i need to write a comment why:- plants photosynthesise 24 hours a day respiration uses up carbon dioxide thanks guys!

*October 6, 2009 by dominique*

**Physics (vectors)**

I am stuck with this question.Please help. I have a triangle that is not a right triangle with sides A, B, and C.(no values).The arrow's heads of A and B are joined and the arrow's head of C is in the tail of B. If the resultant is A,what is the vector equation, and what is ...

*February 15, 2013 by Kathy*

**math**

Help with this complex fraction please... (a+2/a^2+a-2) - (3a+1/a^2+2a-3) LCM is (a-1) (a+2) (a+3) right? then i get stuck

*October 31, 2010 by Anonymous*