Friday

February 12, 2016
Total # Posts: 107

**math**

a playground has sides 17 m, 19 m and 18m. is 60 m of fencing enough to fence the 3 sides?
*January 18, 2016*

**Probability and Statistics**

0.1
*October 29, 2015*

**Probability and Statistics**

In a toy manufacturing company three machines A,B and C are employed to manufactures toys. Machines A, B and C manufacture 20%, 30% and 50% of the total toys respectively. A quality control officer examined the machines and found that A,B and C produce 2%, 3% and 5% defectives...
*October 29, 2015*

**physics**

Advantageous of 3pin plug over 2 pin plug
*October 19, 2015*

**physics**

A piston of cross sectional area 100cm2 is used in hydraulic to exert a force of 10000000dyne find the cross area of another having weight 2000kg
*October 18, 2015*

**History **

Presidential communications are: • Presumptively privileged from compelled disclosure. • Completely confidential. • Absolutely privileged from compelled disclosure. • Not privileged from compelled disclosure whatsoever
*July 17, 2015*

**Chemistry**

Those are the instructions but I just need help with this question. I balanced the reaction between cobalt ii nitrate with sodium phosphate. And I wanted to know why they supernatant liquid color was important when I mixed these two solutions together. I observed a purple ...
*March 1, 2015*

**Chemistry**

Question 2: Use your balanced equation to calculate the volume of 0.12 M Na3PO4 to stoichiometrically react with the 3.0 mL of Co (NO3)2. Show your work. 3) Discuss how your supernatant color in the 6 different test tubes supports your calculated result in #2. For example, if ...
*March 1, 2015*

**sarah**

it can prob be by choice but wut exactly does it mean by chance ?
*December 14, 2014*

**sarah**

is fate choice or chance? explain both sides
*December 14, 2014*

**Math**

Whats the midpoint for 2500-7000? Whats the steps?
*October 8, 2014*

**Math**

James has a square piece of paper. He wants to cut it into strips of equal width. He says, This piece of paper is about 48 cm wide. How can he find the width of each strip without measuring? Is this width accurate?
*May 28, 2014*

**Math**

Marcy paid $35 for 10 kg of raisins. She divided raisins equally into two containers. Then she sold raisins in the first container at $4.50 per kg and those in second container at $5.50 per kg. How much money did Marcy earn after selling all the raisins?
*May 28, 2014*

**Physics**

how did you get the 9.81?
*February 12, 2014*

**Phyics**

In an historical movie, two knights on horseback start from rest 94.3 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.273 m/s2, while Sir Alfred's has a magnitude of 0.280 m/s2. Relative to Sir George's ...
*September 24, 2013*

**phyics**

In an historical movie, two knights on horseback start from rest 94.3 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of 0.273 m/s2, while Sir Alfred's has a magnitude of 0.280 m/s2. Relative to Sir George's ...
*September 23, 2013*

**math**

miss sue?
*March 6, 2013*

**math**

Find the volume of a square pyramid with a base length of 9 cm and a height of 4 cm. 324 cm3 108 cm3 36 cm3 152 cm3 i think it could be d or b im kinda leaning towards d though
*March 6, 2013*

**math**

thx miss sue your awesome.
*March 6, 2013*

**math**

I think its 105
*March 6, 2013*

**math**

Find the volume of a rectangular prism with the following dimensions: Length = 5 mm Base = 7 mm Height = 3 mm 142 mm2 105 mm2 126 mm2 130 mm2
*March 6, 2013*

**math**

Find the volume of a rectangular prism with the following dimensions: Length = 5 mm Base = 7 mm Height = 3 mm 142 mm2 105 mm2 126 mm2 130 mm2
*March 6, 2013*

**biology**

Why are the subclavian vein and subclavian artery positioned where they are relative to each other?
*February 25, 2013*

**chemistry**

Some liquids have enough attractions between molecules to form dimers. (Dimers are molecules formed from the combination of identical molecules, A + A --> A2.) What effect would this have on the experimental molar mass? This was a molar mass lab. Alcohol evaporated in an e-...
*January 23, 2012*

**QUESTION**

ya i realized that but I still have no idea how you get 2 - [(x-2)^2sgn(2-x)]/2 by hand...
*March 19, 2011*

**physics**

The flywheel of a steam engine runs with a constant angular speed of 164 rev/min. When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 1.6 h. I figured out the constant angular acceleration=1.71 rev/min2 but im not sure how to find:What ...
*September 28, 2010*

**Math**

the volume of fort peck dam is 96,000 X 1,000 m3. Suppose the state of Montana decides to increase the volume of the dam. After the improvements, fort peck will hold 10 times as many cubic meters will fort peck hold after the improvemts?
*August 28, 2010*

**confidentiality of health information**

Joe researcher asks for access to patient records as part of a research project. What should the health information manager do? A. Say yes-access for research is permitted. B. Say no. C. Tell Joe to submit his request to an institutional review board if he doesn't have ...
*April 28, 2010*

**HCA 270 Approaches to Valuation**

To the people that are bashing students looking for help: Why are you on here if you were not looking for help yourself?? A person can have mutiple degrees and if you really do this site showing the kind of statements you make shows how extremely ignorant you are. Sometimes a ...
*February 18, 2010*

**Chemistry**

What are the raw materials for polyethene and polystyrene?
*January 3, 2010*

**math**

Would the fact 1 (american) gallon = 3.785L and 1 (canadian) gallon = 4.55L come into affect for # 5?
*October 26, 2009*

**Physics Fluids**

Fg on object = (it's density)(it's volume)g Fb = (density of water)(volume of water underneath object pushing it up)gravity your suppose to divide the two gravity is suppose to cancel out and the volume but the volumes are two different objects why are they the same
*October 23, 2009*

**QUESTION**

why are the volumes the same
*October 23, 2009*

**QUESTION**

ok so I got down to this x = sqrt( ((m1 + m2)(3.84 E 8))/m2 ) which gave me the wrong answer
*September 13, 2009*

**QUESTION**

m3 = mass of satalite (G m3 m2)/x^2 = (G m3 m1)/(3.84 E 8 m - x)^2 I can cancel out the m3 and the G right?
*September 13, 2009*

**Physics**

ok I'll be using a home work problem to ask the question. I'm not asking for help on the question I got the correct answer just need to understand this concept better. Calculate the acceelration due to gravity on the Moon. The moon's radius is about 1.74 E 6 meters...
*September 12, 2009*

**TO BOBPURSLEY**

ok i get it see new question
*September 12, 2009*

**TO BOBPURSLEY**

Fg exerted by whatever it's orbiting onto moon = r^-2 G (mass of moon) M = to the gravitional force exerted by moon onto M = Mg ok then you can divide by M but why is it the force of gravity exerted by the moon onto whatever it's orbiting mass M just equal to Mg ??? ...
*September 12, 2009*

**TO BOBPURSLEY**

ok net force = m a only force present force of gravity Fg = mg = r^-2 G m M were m is the mass of the moon and the M is the mass of what ever it's orbiting... correct? Fg = mg = r^-2 G m M divide both sides by the mass of the moon g = r^-2 G M so I guess I just don't ...
*September 12, 2009*

**physics**

Us = (rg)^-1 V^2 Us = (.12 m (9.80 kg^-1 N))^-1 (22.35 s^-1 m)^2 Us = 420 back of book says .34
*September 5, 2009*

**QUESTION**

50 mph is in the question in the book
*September 5, 2009*

**very easy algebra one**

which expression is correct from this 180 s(a t3) THIS ONE??? (180 s)a + (180 s)t3 or this ONE??? 180 s * a * t3
*August 21, 2009*

**Physics**

I just need to know how to start this equation because it makes no sense The position of a particle is given by r = (6.0 cos 3.0 t i + 6.0 sin 3.0 t j) meters. Determine (a) the velocity vector, v, and (b) teh acceleartion vector, a. (c) What is the parth of this particle? [...
*August 20, 2009*

**Physics (Algebra Bit)**

Is the answer to (c) correct by the way for the other problem I didn't know how fast it would be accelerating realtive to the larger block because teh larger block would be accelerating more at 5.2 s^-1 m and the smaller block accelerates at 3.2 s^-1 m so I wasn't sure...
*August 20, 2009*

**Physics (Algebra Bit)**

thanks for help on other question =]
*August 20, 2009*

**Physics (Algebra Bit)**

I still need help on my other question as well... A runner hopes to complete the 10,000 m run in less than 30.0 min. AFter running at constant speed exactly 27.0 min there are still 1100 m to go. The runner must then accelerate at .20 s^-2 m for how many seconds in order to ...
*August 20, 2009*

**Physics**

ok for the applied force for (a) on the bottom block I got 83 N not sure if it's right... for the applied force in (b) wouldn't it be the same... I'm confused... Can you check my answer for (c)
*August 20, 2009*

**Physics**

can you check my answer for (c)
*August 20, 2009*

**Physics**

Sense this problem 32 the answer isn't in the back =[
*August 20, 2009*

**Physics**

ok part (b) A 4.0 kg block is stacked on top of a 12.0 kg block, whcih is accelerating along a horizontal table at a = 5.2 s^-2 m. Let Mu k = Mu s = Mu. (a) What mininum coefficent of friction Mu between the two blocks will prevent the 4.0 kg block from sliding off? (b) If Mu ...
*August 20, 2009*

**Physics**

also is the talbe frictionless or not I couldn't understand by the way it was worded
*August 20, 2009*

**Physics**

hmmmmmm interesting THANKS YOU
*August 20, 2009*

**Physics**

wouldn't it have a zero acceleration sense it's suppose to not be moving
*August 20, 2009*

**Physics**

Were did 4.5 s^-2 m come from???
*August 20, 2009*

**Physics**

Isn't net force x direction = -Ffr sense it's in the left direction then I would get a negative Mu???
*August 20, 2009*

**Physics**

i don't see how to apply Newtons second law to the top block there's a force pointing left the force of static friction is there a force opposing this force pointin in the right direction? How do I find the mininum coefficent of friction
*August 20, 2009*

**Physics**

A 4.0 kg block is stacked on top of a 12.0 kg block, whcih is accelerating along a horizontal table at a = 5.2 s^-2 m. Let Mu k = Mu s = Mu. (a) What mininum coefficent of friction Mu between the two blocks will prevent the 4.0 kg block from sliding off? (b) If Mu is only half...
*August 20, 2009*

**Physics**

ok for drag force c = v^-2 Fgx = (2.639 s^-1 m)^-2 95.5 N Fgx = mg sin theta
*August 20, 2009*

**Physics**

ok for b i got 565 N which was correct with book answer in back
*August 20, 2009*

**Physics**

ok I know this is right I redid it (a) 13.7 m^-1 kg
*August 20, 2009*

**Physics**

for (b) i got -.4172 N ;[
*August 20, 2009*

**Physics**

ok for (a) 13.7 s^-1 kg
*August 20, 2009*

**Physics**

part b ... a velocity of 25 h^-1 km is it constant velocity were there would be no acceleration if so then there would be no net force... so i'm lost
*August 20, 2009*

**Physics**

ok i'm stuck on part (b)
*August 20, 2009*

**Physics**

ok with correct sig figs (a) 13.7 m^-1 kg
*August 20, 2009*

**Physics**

ok for (a) 13.719 m^-1 kg
*August 20, 2009*

**Physics**

ok how is this for (a) 8.2 x 10^-14 m^-1 kg
*August 20, 2009*

**Physics**

ok fixing answer for (a)
*August 20, 2009*

**Physics**

wait I think i got it lol can you tell me if my answer for (a) is right???
*August 20, 2009*

**Physics**

this one is kind of hard A bicyclist can coast down a 7.0 degree hill at a steady 9.5 h^-1 km. If the drag force is proportional to teh square fo the speed v, so that Fd = cv^2, calculate (a) the value fo teh constant c and (b) the average force that must be applied in order ...
*August 20, 2009*

**Physics**

when resolving gravity into components Fg (x component) = Fg sin theta when you get the units you get Newton times a degree how come we just ignore the degree for example if it was 9 N you wouldnt say 9 N (degrees) why not? How do the degrees just magically dissapear not to ...
*August 20, 2009*

**physics**

oh wow... Thanks!!!
*August 20, 2009*

**physics**

if you do this t=ã(2S/a)=10/5.886=1.303 s. your doing teh full distance 10 m instead of 5 m right??? so why would you double it
*August 20, 2009*

**physics**

I did that
*August 20, 2009*

**physics**

Acceleration for first half of trip... apply newtons second law... net force = m a = - F fr = - (Mu s Fn) were Mu s is coefficent of static friction take the inverse of m onto both sides a = m^-1 -(Mu s Fn) apply Newtons second law in the y direction net force (y direction) = ...
*August 20, 2009*

**physics**

ok Boxes are moved on a converyor blet from where they are filled to the packing station 10m away. The belt is initially stationary and must finish with zero speed. The most rapid transit is accomplished if the belt accerlates for half the distance, then decelerates for teh ...
*August 20, 2009*

**Physics**

ok Boxes are moved on a converyor blet from where they are filled to the packing station 10m away. The belt is initially stationary and must finish with zero speed. The most rapid transit is accomplished if the belt accerlates for half the distance, then decelerates for teh ...
*August 19, 2009*

**Physics**

I'm trying to prove Kepler's equations the proof is in my book but I don't understand it (T1/T2)^2 = (s1/s2)^3 ok first what allows us to rewrite that formula as so??? (s1^3/T1^2)=(s2^3/T2^2) my book goes about the proof as m1 ((4 pi^2 r1)/T1^2) which I get but ...
*August 19, 2009*

**QUESTION**

oh and also what makes angle three equal to angle to if you extended the lines
*August 18, 2009*

**QUESTION**

what are these opposite angles that you are making reference to sorry it's been a while sense I took geometry
*August 18, 2009*

**QUESTION**

I agree and as you can see I wrote "...Vo^2 dosen't become Vo" not ""...Vo^2 dosen't become V"
*August 18, 2009*

**QUESTION**

I didn't right Vo^2 as V...
*August 18, 2009*

**Question**

ok why are they the same thing???
*August 17, 2009*

**Physics**

no that was it thanks
*August 12, 2009*

**Physics**

ok were doing a lab h t t p: / /i m g2 0 0. i m a ge s h a c k. u s / im g 2 0 0 / 30 3 8 /s k e t c h 2 p q g. j p g the timer in the picture makes a mark on the tape at a set interval... my question is well what is actually is happening is that I'm pulling the tape sense...
*August 12, 2009*

**physics**

Thanks =]
*August 12, 2009*

**QUESTION**

what if the velocity is kept constant or is suppose to at least
*August 12, 2009*

**Question**

I understand that the vectors should add up I just did a rough sketch sorry so how come when we know the angle the ramp makes with the surface, theta 3, it sits on say 37 degrees we can find fg x = fg sin theta 2 = fg sin 37 fg y = fg cos theta 1 = fg cos 37 If these equations...
*August 10, 2009*

**math**

Posted by question on Wednesday, July 22, 2009 at 4:56pm. solve 5/8x + 1/16x=7/16+= the solution is x=___ Responses math - Mr. L, Wednesday, July 22, 2009 at 7:23pm 5/8x is the same as 10/16x That should help my final answer would be 7/27 do i have it right
*July 22, 2009*

**math**

solve 5/8x + 1/16x=7/16+= the solution is x=___
*July 22, 2009*

**math**

the width of a rectangle is fixed at 27 cm. what lengths will make the perimeter greater than 70cm? the length must be greater than _70_ cm please check if this is correct. thank you!!
*July 21, 2009*

**QUESTION**

they cancle each other out look (a = m2^-1 (m1 a) -g )a^-1 = 0 = m2^-1 m1 - g 0 = m2^-1 m1 - g
*July 14, 2009*

**QUESTION**

I got this a = m2^-1 (m1 a) -g i'm stuck from there
*July 14, 2009*

**QUESTION**

what's FBD how do i solve for F2
*July 12, 2009*

**French**

Doesn't septieme mean seventh?
*June 3, 2009*

**fin 200**

considering investing in a company. Which financial ratios would you find most useful? Why?
*May 30, 2009*

**math**

5--4 x B can have no carryover to 4 x 2 so B must be 1 as A is already 2. why can't B be 0 at step 5? At this point, B can be 0,1,2, and you can eliminate 2 per your reason, but you can't eliminate 0 yet--which makes the rest of your steps invalid.
*January 31, 2008*

**question**

what is garbologist. What they do. A garbologist is a scientist who studies garbage to learn about societies and cultures. Check this site for more information. http://environmentalchemistry.com/yogi/environmental/wastehistory.html
*June 11, 2007*

**science**

what is a reproductive cell? http://www.google.com/search?as_q=reproductive+cell&hl=en&num=10&btnG=Google+Search&as_epq=&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_nlo=&as_nhi=&as_occt=title&as_dt=i&as_sitesearch=&as_rights=&safe=active
*March 18, 2007*

**Chemistry**

What is the molarity of a phosphoric acid solution if 32.3 mL of the phosphoric acid solution is titrated to the final equivalence point with 20.6 mL of 0.581 M sodium hydroxide acid solution? H3PO4 + 3NaOH ==> Na3PO4 + 3H2O mols NaOH = 0.0206L*0.581 M= ?? mols H3PO4 = 1/3...
*February 11, 2007*