Monday
September 1, 2014

Posts by Question


Total # Posts: 96

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

Biology
What structures make up the fibers of the mitotic spindle? Since this is not my area of expertise, I searched Google under the key words "mitotic spindle fiber structure" to get these possible sources: http://www.springerlink.com/content/n1545188147w90l7/ http://...
February 2, 2007

Social Studies
Discuss the validity of the following quotation: "The British imperial economic system, including mercantilism, exploited the American colonists and offered them few benefits. As such it represented a valid reason for revolution." http://www.google.com/search?q=...
January 31, 2007

Chemistry
During reaction mechanism... A. catalyst does not change the reaction mechanism. B. catalyst changes the reaction mechanism. C. catalyst always makes a reaction mechanim more complicated. Catalysts lower the activation energy and provide alternative pathways to increase the ...
January 28, 2007

Chemistry
During rate of reverse step... A. A catalyst decreases the reverse rate of reaction. B. A catalyst does not change the reverse rate of reaction. C. A catalyst increases the reverse rate of reaction. A catalyst hastens the time for equilibrium to be attained. A A
January 28, 2007

Chemistry
During activation energy... A. A catalyst lowers the activation energy by changing the reaction mechanism. B. A catalyst does not change the activation energy. C. A catalyst lowers the activation energy by changing the rate. D. A catalyst raises the activation energy by ...
January 28, 2007

Biology
why does proline stain yellow in ninhydrin?
January 25, 2007

Biology
How many types of amino acids are there in milk? I believe there are either 8 or 9, all of which are essential to humans because humans cannot create these proteins.
January 25, 2007

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