Wednesday

May 4, 2016
Total # Posts: 80

**physics**

A lineaer spring having a force constant k=40 N/m hangs vertically,supporting a 0.8 kg mass.the mass is then pulled down a distance of 0.15 m . During up and down oscillations ,the maximum speed of the mass will be..
*November 21, 2015*

**biochemistry**

what is the ph of 1.0 m acetic acid and 1.0 sodium acetate. (ka=1.8x10-5)
*October 25, 2015*

**org chem**

THANK YOU! if there are many unpaired electrons, will it means its polar?
*July 10, 2015*

**org chem**

How to know if there's a dipole moment???
*July 10, 2015*

**maths**

easiest method for dividing
*December 1, 2014*

**Linear Programming**

A Company wishes to assign six of its workers to six different jobs (one worker to each job and vice versa). The rating of each worker with respect to each job on a scale of 0 to 10 (10 being a high rating) is given by yhe following table: Job 1 Job 2 Job 3 Job 4 Job 5 Job 6 ...
*October 14, 2014*

**Chemistry**

it might be 1/(8+1) and he/she must be missing () brackets
*October 3, 2014*

**MATH?!!?**

a store sells ladders. . the retail price was a 40m percent markup over the manufacturer price. .a month later, the store reduced the retail price of the ladder by 25 percent What percent markup is the new retail price over the manufacturer price?
*February 9, 2014*

**physics**

7/8 part of a substance decays in 45 days what is its half life
*February 5, 2014*

**physics**

Answere this question
*November 6, 2013*

**Math**

Lactose (MW:342 amu) makes up the vast majority of the carbohydrate. Calculate the molarity of lactose in buttermilk and compare it to that of protein.
*October 12, 2013*

**Math**

If each 11 football teams In a college athletic conference played each of the other teams just once in a season, how many games would there be? As part of your answer, make a table. How many games would there be for 12 teams?
*August 21, 2013*

**Precal**

:D thank you!!! I guess I've been staring at this for too long and probably not typing them correctly on the calculator! THANK YOU SO MUCH!!!!!!
*June 22, 2013*

**Precal**

I'm still not understanding... it's okay i'll keep trying to figure it out. im clearly not double checking it right since i checked for 1 and got a positive answer but its supposed to be negative till 2 :-/ thank you so much for your time! it is honestly ...
*June 22, 2013*

**Precal**

but if replace x with -4 i get a positive answer too!
*June 22, 2013*

**Precal**

if i replace -.001 with x i get 6001.001 how are you solving that without calculator
*June 22, 2013*

**Precal**

yes, it gives me 6001.001 as an answer You're not using a cal?
*June 22, 2013*

**!?**

Aww it's not funny, it's frustating! :( you want me to replace x with -3 not sure what you're meaning by that try -3/-.001 where did you get the .001?? I'm so sorry i'm not understanding and thank you so much for helping
*June 22, 2013*

**ugh **

See, this is where i have trouble understanding. if i put if in the calculator i see why it'd be -3 to 0 but in the exams the professor makes sure we are not able to graph inequality in calculator my graph was off on paper, i just verified on ti84+ and it looks different :-/
*June 22, 2013*

**Precal**

I ended up with SS: (-00,-3]union [2,00) why would it be -3 to 0?
*June 22, 2013*

**Precal**

Isn't it x^2+x-6 = 0 (x+3)(x-2) = 0? x = -3 or x= +2?
*June 22, 2013*

**Precal**

Sorry i should have put that in parenthesis (x^2+x-6)/x greater than or equal to 0
*June 22, 2013*

**Precal**

EDIT WHERE INEQUALITY IS GREATER THAN OR EQUAL TO ZERO
*June 22, 2013*

**Precal **

Please help. I'm having a lot of trouble with solving inequalities and graphing them solve the inequality and graph the solution on the real number line x^2+x-6/x I got SS: -infinity to -3 including -3 union -2 to infinity including -2 is that right?
*June 22, 2013*

**Pre-cal**

I did have to find those too but i was stuck on the Period! thank you so very much!
*June 20, 2013*

**Pre-cal**

I'm supposed to graph y= 4+2sin (pi/6 t -pi/5) i have the vertical shift d=4 amplitude 2 level line y=4 crest line y=6 trough line y=2 but i am not sure what the period is formula for period 2pi/b in this case 2pi/pi/6 => 12pi/pi do the pi's cancel, leaving the ...
*June 20, 2013*

**Precal**

An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200-meter running track. a) Draw a figure that visually represents the problem. Let x and y represent the length and width of the rectangular ...
*June 13, 2013*

**Precal**

An indoor physical fitness room consists of a rectangular region with a semicircle on each end. The perimeter of the room is to be a 200-meter running track. a) Draw a figure that visually represents the problem. Let x and y represent the length and width of the rectangular ...
*June 13, 2013*

**chemistry**

Determine the mass of CO2 gas that has a volume of 7.10 L at a pressure of 1.11 atm and a temperature of 31.0°C.
*January 21, 2013*

**Physics Urgent!!!!!**

OK, I know, I'm postin this way too many times but I'm halfway there now.... Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G...
*May 2, 2011*

**Physics Urgent!!!!! I really need help with this**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by ...
*May 2, 2011*

**Physics Urgent!!!!! I really need help with this**

I was substracting both radii, now I tryed (6.674E-11)(0.730283)(157.850)/(0.2286)^2 and I got 1.47E-7 and tryed 6.674E-11)(0.730283)(157.850)/(0.2286 +.1524 +.0254)^2 and I got 4.66E-8... but niether is right....
*May 2, 2011*

**Physics Urgent!!!!! I really need help with this**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by ...
*May 2, 2011*

**Physics (please help!!!!)**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by ...
*May 2, 2011*

**Physics (please help!!!!)**

I showed it.... r1= 0.0254m, m1=0.730283 kg, r2= 0.152m and m2=157.850 kg... I calculated (6.674E-11)(0.730283)(157.850)/(0.152m-0.0254m)^2 and I got 4.77E-7 and multiplyed it by 2 and then I got 9.54 E-7...
*May 1, 2011*

**Physics (please help!!!!)**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by ...
*May 1, 2011*

**Physics (please help!!!!)**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by ...
*May 1, 2011*

**Physics Urgent!!!!!**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by ...
*May 1, 2011*

**Physics Urgent!!!!!**

But I just have to plug in one number for part A that most be E-7 and for part B I have to plug only one number too that must be E-8.
*April 30, 2011*

**Physics Urgent!!!!!**

Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in the late 18th ...
*April 30, 2011*

**Physics Urgent!!**

Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in the late 18th ...
*April 30, 2011*

**Physics Urgent!!**

Is that for A?
*April 30, 2011*

**Physics Urgent!!**

Ok, so I have r1= 0.0254m, m1=0.730283 kg, r2= 0.152m and m2=157.850 kg... I calculated (6.674E-11)(0.730283)(157.850)/(0.152m-0.0254m)^2 and I got 4.77E-7 and multiplyed it by 2 and then I got 9.54 E-7... Does this looks right?
*April 30, 2011*

**Physics Urgent!!**

Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in the late 18th ...
*April 30, 2011*

**Physics Urgent!!!!!**

Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly measuring the interaction force in the late 18th ...
*April 30, 2011*

**algebra**

what is the area of length 5 and with 6
*April 23, 2011*

**Chemistry (please check)**

1)Which of the following compounds has the largest lattice energy: LiF LiCl NaF NaCl 2)Which of the following compounds has the most ionic character in its bonding: CaBr2 GeBr4 KBr GaBr3 3)Using the electronegativity table on page 364 of your text, which end of the B-N bond is...
*April 15, 2011*

**Calculus**

Water is leaking out of an inverted conical tank at a rate of 1100.0 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 15.0 meters and the diameter at the top is 5.0 meters. If the water level is rising ...
*April 12, 2011*

**Calculus**

Water is leaking out of an inverted conical tank at a rate of 1100.0 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 15.0 meters and the diameter at the top is 5.0 meters. If the water level is rising...
*April 12, 2011*

**Calculus Please Help**

Let f(x) = x^3 - x^2 + x - 1. Find an equation for tangent line to f at x = 2.
*March 23, 2011*

**Calculus (pleas help!)**

For what values of k is lim x -> INF coshkx/sin2x finite?
*March 18, 2011*

**Calculus (pleas help!)**

For what values of k is lim x -> INF coshkx/sin2x finite? (Enter your answer as an interval or list of intervals, for example, (-infinity,3], (5,7). Enter none if no values of k will work.) Please help..
*March 17, 2011*

**Calculus (pleas help!)**

For what values of k is lim x -> INF coshkx/sin2x finite? (Enter your answer as an interval or list of intervals, for example, (-infinity,3], (5,7). Enter none if no values of k will work.) Please help..
*March 17, 2011*

**Calculus (pleas help!)**

Find the slope of the tangent line to the ellipse x^2/36 + y^2/49 =1 at the point (x,y). slope =_______ Are there any points where the slope is not defined? (Enter them as comma-separated ordered-pairs, e.g., (1,3), (-2,5). Enter none if there are no such points.) slope is ...
*March 17, 2011*

**Physics (please help)**

Hi Damon, Thanks for your help. Can you explain me how you got alpha (2/3) t^(3/2) ? Because I got alpha (4/3) t^(3/2) = beta (1/2) t^2 and then t= [(8/3)(alpha/beta)]^2 I then used my equation of beta and substituted t with my answer and I got x=(4096aplpha^4)/(162beta^3)
*February 11, 2011*

**Physics (please help)**

Two cars are drag racing, starting from rest at t = 0, on a straight and level road. Team Alpha's car produces acceleration ax = alpha t^(-1/2) ; while Team Beta's car produces acceleration ax = Beta ; for all t > 0, where alpha and beta are positive constants with ...
*February 11, 2011*

**Calculus**

Consider the function f(x)=(4^x−1)/x. (a) Fill in the following table of values for f(x): x= -0.1 -0.01 -0.001 -0.0001 0.0001 0.001 0.01 0.1 f(x)= I the the falues of f(x) for each interval... (b) Based on your table of values, what would you expect the limit of f(x) as...
*February 9, 2011*

**Calculus**

Consider the function f(x)=(4^x−1)/x. (a) Fill in the following table of values for f(x): x= -0.1 -0.01 -0.001 -0.0001 0.0001 0.001 0.01 0.1 f(x)= I the the falues of f(x) for each interval... (b) Based on your table of values, what would you expect the limit of f(x) as...
*February 9, 2011*

**Calculus**

the values I got for f(x) were 4.9; 4.99; 4.999; 4.9999; 5.0001; 5.001; 5.01; 5.1 The two firsts and the two lasts values are not correct and I dont know why... the limit is 5 also what i have for the other part is -.00001<=x<= .00001 4.9999<=y<=5.0001 the values ...
*February 9, 2011*

**Calculus**

Consider the function f(x)=sin(5x)/x. (a) Fill in the following table of values for f(x): x= -0.1 -0.01 -0.001 -0.0001 0.0001 0.001 0.01 0.1 f(x)= ( I need the values of f(x) for each x) (b) Based on your table of values, what would you expect the limit of f(x) as x approaches...
*February 9, 2011*

**Physics**

Two cars are drag racing, starting from rest at t = 0, on a straight and level road. Team Alpha's car produces acceleration ax = alpha t^(-1/2) ; while Team Beta's car produces acceleration ax = Beta ; for all t > 0, where alpha and beta are positive constants with ...
*February 9, 2011*

**Calculus**

The first value I tried was 3... and it didn't work either, I thought that the fact that it said "x is in degrees" affected. It also said at the end: (Give your answer accurate to at least 0.01...
*February 9, 2011*

**Calculus**

Use the graph to estimate the limit: lim x->0 sin(3x)/x When x is in degrees lim x->0 sin(3x)/x = ________ I thought the the answer was (3*180)/pi but it's not... please help... Thanks
*February 9, 2011*

**Physics**

Two cars are drag racing, starting from rest at t = 0, on a straight and level road. Team Alpha's car produces acceleration ax = alpha t^(-1/2) ; while Team Beta's car produces acceleration ax = Beta ; for all t > 0, where alpha and beta are positive constants with ...
*February 9, 2011*

**Simple Harmonic Motion**

I forgot to mention that the experiment is to teach us error analysis methods... I have to get the values of k for each interval Mass(g) Distance (m) 200 0.438 250 0.398 300 0.345 350 0.312 400 0.297 450 0.281 500 0.259 the values for k I got were k (N/m) 0 61.3 55.5 104 261 ...
*February 8, 2011*

**Simple Harmonic Motion**

have performed an experiment of simple harmonic motion and the values I got Mass(g) Distance (m) 200 0.438 250 0.398 300 0.345 350 0.312 400 0.297 450 0.281 500 0.259 I would like to know how to calculate the spring constant... since I have been having weird values, if ...
*February 8, 2011*

**Physics**

I have performed an experiment of simple harmonic motion and the values I got Mass(g)Distance (m) 200 0.438 250 0.398 300 0.345 350 0.312 400 0.297 450 0.281 500 0.259 I would like to know how to calculate the spring constant... since I have been having weird values, if ...
*February 8, 2011*

**Physics**

Can someone please tell me how to calculate the standard deviation of the following values? 0.985 0.985 1.005 1.455 1.035 And please for the following numbers too 1.47 1.52 1.50 1.45 1.39
*February 8, 2011*

**social studies**

do you have any quizes
*December 31, 2010*

**Physics**

A 5.4 kg bag of groceries is in equilibrium on an incline of angle θ= 150. Find the magnitude of the normal force on the bag
*November 30, 2010*

**5th grade social studies**

whats the question
*November 7, 2010*

**calculus**

Two cars, one traveling north and one traveling west, collide at an intersection.The resulting momentum of the two cars together after the collision is 32 000 kg . m/s N30degreesW. Find the momentum of each car before the collision.
*May 2, 2010*

**Maths**

(tanÈ+cotÈ)(sinÈ+cosÈ)=secÈ+cosecÈ
*September 11, 2008*

**chemistry**

why is it good to be a csi
*September 9, 2008*

**science - refraction**

why is refraction important when seomeone uses a camera?
*April 25, 2008*

**Chemistry**

actually when you calculate the equilibrium concentrations of each using the 0.010 L you find that the concentration of KSCN is the limiting reagent. so [FeSCN]^2 = mols KSCN/0.010L
*April 13, 2008*

**maths**

4x+3y=21 What is your question? You have simply stated the equation of a straight line. what is a prime factorazation?> expressing a number in terms of its Prime factors eg. 126 = 2*3*3*7 all the factors are prime numbers How does this relate to the first problem you posted?
*March 23, 2007*

**Health Project Ideas**

Try your brain on Crystal Meth
*February 6, 2007*

**the big idea of energy**

Sooooooo Energy can't be destroyed it just changes state So the heat energy used on the iron and sulphur is then changed into chemical bonds, heat energy, light energy etc. The energy is still there but being used as chemical bonds to keeep the compound as a compound. The ...
*December 5, 2006*

**science**

science is a natural phenomena
*June 15, 2005*

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