Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 94

**Physics**

how did you get the 9.81?

**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 start...

**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 start...

**math**

miss sue?

**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

**math**

thx miss sue your awesome.

**math**

I think its 105

**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

**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

**biology**

Why are the subclavian vein and subclavian artery positioned where they are relative to each other?

**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-...

**QUESTION**

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

**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 ...

**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?

**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 aut...

**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 ...

**Chemistry**

What are the raw materials for polyethene and polystyrene?

**math**

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

**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

**QUESTION**

why are the volumes the same

**QUESTION**

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

**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?

**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...

**TO BOBPURSLEY**

ok i get it see new question

**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 ??? Pl...

**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 g...

**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

**QUESTION**

50 mph is in the question in the book

**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

**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? [Hi...

**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...

**Physics (Algebra Bit)**

thanks for help on other question =]

**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 ac...

**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)

**Physics**

can you check my answer for (c)

**Physics**

Sense this problem 32 the answer isn't in the back =[

**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 ...

**Physics**

also is the talbe frictionless or not I couldn't understand by the way it was worded

**Physics**

hmmmmmm interesting THANKS YOU

**Physics**

wouldn't it have a zero acceleration sense it's suppose to not be moving

**Physics**

Were did 4.5 s^-2 m come from???

**Physics**

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

**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

**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...

**Physics**

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

**Physics**

ok for b i got 565 N which was correct with book answer in back

**Physics**

ok I know this is right I redid it (a) 13.7 m^-1 kg

**Physics**

for (b) i got -.4172 N ;[

**Physics**

ok for (a) 13.7 s^-1 kg

**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

**Physics**

ok i'm stuck on part (b)

**Physics**

ok with correct sig figs (a) 13.7 m^-1 kg

**Physics**

ok for (a) 13.719 m^-1 kg

**Physics**

ok how is this for (a) 8.2 x 10^-14 m^-1 kg

**Physics**

ok fixing answer for (a)

**Physics**

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

**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 t...

**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 me...

**physics**

oh wow... Thanks!!!

**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

**physics**

I did that

**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) = ...

**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 fi...

**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 fi...

**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 the...

**QUESTION**

oh and also what makes angle three equal to angle to if you extended the lines

**QUESTION**

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

**QUESTION**

I agree and as you can see I wrote "...Vo^2 dosen't become Vo" not ""...Vo^2 dosen't become V"

**QUESTION**

I didn't right Vo^2 as V...

**Question**

ok why are they the same thing???

**Physics**

no that was it thanks

**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...

**physics**

Thanks =]

**QUESTION**

what if the velocity is kept constant or is suppose to at least

**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...

**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

**math**

solve 5/8x + 1/16x=7/16+= the solution is x=___

**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!!

**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

**QUESTION**

I got this a = m2^-1 (m1 a) -g i'm stuck from there

**QUESTION**

what's FBD how do i solve for F2

**French**

Doesn't septieme mean seventh?

**fin 200**

considering investing in a company. Which financial ratios would you find most useful? Why?

**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.

**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

**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

**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*...

**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://user...

**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=briti...

**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 ra...

**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

**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 changi...

**Biology**

why does proline stain yellow in ninhydrin?

**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.

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