# Physics-repost, sorry, I still don't understand :(

91,240 results

### Physics-repost, sorry, I still don't understand :(

A forearm with a mass of 1.2kg supports a ball with a mass of 5.44 kg. The forearm is 0.050m long; it's perpendicular to the arm is 0.35m long, the center of gravity is at 0.15m from the elbow. Find the force exerted by rhe biceps and the force on the elbow joint. I know this ...

### physics repost

sorry! I never noticed..the mass should be 52000kg sorry about that!

### Chemistry

Repost:: sorry couldn't understand it What is the concentration of C2O4^-2 in a 0.370M oxalic acid solution? Ka1=5.6x10^-2 and Ka2=5.1x10^-5

### History *repost* (sorry!)

After the Gupta Empire collapsed, what group gained control of much of India? Muslims from Afghanistan Buddhists from China*** Christians from Ethiopia local Hindu princes Which of the following was NOT a part of the organization of the early Christian church? the pope the ...

### English

1. I still could not understand him. 2. I still don't understand. 3. He was still waiting for her . 4. He has still been looking for the kid. ----------------------------- Is the position of 'still' correct? Are they all acceptable in terms of grammar?

### Physics, still don't get it!

I'm sorry bobpursley I don't understand your response, please clarify. When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12 Hz. When another object of mass m2 is hung on the spring along with m1, the frequency...

### Chemistry

Sorry, I still do not understand why metals react more vigorously in acids than in water?

### math

3 3/4pt=____c show steps and work please Try the method DrWLS or I showed you FIRST. Repost if you still don't get it but tell us what you don't understand about the procedure.

### Just a repost, in case the old isnt seen

sorry! I never noticed..the mass should be 52000kg sorry about that! For Further Reading physics repost - Alexis, Sunday, October 14, 2007 at 6:07pm so it should be a 52000kg train slows from 25 m/s to 14m/s in 5.0 s. Calculate the work done on the train. so I found the ...

### Physics repost

A 2.00 resistor, and a 12.0 resistor are connected in parallel across a 20.0-V battery. What is the current flowing through the 2.00 resistor? A)1.67 A B)1.40 A C)11.6 A D)10.0 A This is all I understand. Can you explain step by step and show how to get the answer? To find ...

### Bobpursley can you help me with my problems below?

I had problems from yesterday but I still don't get them can you help?do you want me to repost? repost: I cant find them.

### 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 ...

### 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 ...

### 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 ...

### Math repost - girly93

Posted by girly93 on Monday, February 9, 2009 at 2:55am. i don't understand the sine and cosine rules. 1/2 ab sinC and cosA= b2 + c2 - a2 what??? i have asked my teacher but i still don't get it.

### english

Homework Help Forum: brain teaser help Current Questions | Post a New Question Answer this Question | Further Reading Posted by sam on Sunday, April 2, 2006 at 3:34pm. try to find the error. I couldn't; it's very hard. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z did ...

### physics repost

I am still trying to solve for H in this equation but I am still lost MgH = (1/2)*k*(H-2-10)^2 + Mg*2 I was told to expand the square on the right, gather terms, put it in the standard quadratic form, and use the quadratic formula, but I don't know how. Should it be Mgh=(H-12...

### physics repost

I am still trying to solve for H in this equation but I am still lost MgH = (1/2)*k*(H-2-10)^2 + Mg*2 I was told to expand the square on the right, gather terms, put it in the standard quadratic form, and use the quadratic formula, but I don't know how. Should it be Mgh=(H-12...

### 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 ...

### About Posting

sorry for repost ~C

### Social Studies

I am so sorry about posting again but I still don't understand the social impact the airplane made at the time when it was invented...

### 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 ...

### english

sorry i havent really used this site and im not sure how to repost my question instead of putting it as an answer to my question so heres the repost: I had to find embedded clauses I deplore the fact that bats have wings. --> bats have wings That Guinevere loves Lorian is ...

### math

Sorry my mistake. i had typed up the wrong question mr.bobpursley. What I meant to say was 66 2/3% of ____ = 74. I still can't understand how to figure this out? It is done exactly as I stated. I changed 66 2/3 percent to a fraction 2/3.

### math (repost)

Question: Can MSI (1000 sq inch) be converted into "linear feet"? Answer that was given: Yes, 1MSI = 6.94 ft In a previous post I was told to divide 1000 by 144, but won't that just leave me with 6.94 sq ft? I'm still a bit confused by this, can some one help me understand this?

### algebra 117

repost sorry about that (k^1/8)^-4 oer(k^7)^1/2

### English 12 (URGENT!!!)

Sorry to repost this. I am still a bit confused of the last post. No Man is an Iland: "any man's death diminishes me, because I am involved in mankind" My teacher asked me for my opinion, is the quote true and I answered yes. Now I need proof to back up my opinion. I need to ...

### geog- still

sorry to be a pain but it still doesn`t answer the question . my homework is a wordsearch and i only have clues its to do with diversity in the uk. the only 2 i can`t find is sikh temples and muslim mosques i can`t find anything in the wordsearch that matches . im so stuck ive...

### geog- still

sorry to be a pain but it still doesn`t answer the question . my homework is a wordsearch and i only have clues its to do with diversity in the uk. the only 2 i can`t find is sikh temples and muslim mosques i can`t find anything in the wordsearch that matches . im so stuck ive...

### physics As

The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says: Thinking distance= 30 X 0...

### gurublue bobpursley and writeacher

im sorry to have kept on asking that's what i couldn't understand sorry i was getting confused. thankyou so much for your help hopefully i wont ask again!

### algerba!2!

(-2x2y)3 * (5xy3)2 *I don't get this on at all!!! Are there any exponents in this one? If so, repost showing the caret to indicate the exponent. oh sorry I forget to do that.LOL!Here it is now: (-2x^2y)^3 * (5xy^3)^2 Are there any exponents in this one? If so, repost showing ...

### ethnics help

sorry to interrupt is someone available for help. Please repost with your question, and we will do our best to help. Thanks for asking.

### chemistry (spectrophotometry)

I'm sorry but I still don't understand the concept of spectral analysis and the baseline. What does these words mean and what are they for? I'm confused... Note: the experiment determines the concentration of iron in iron(II) phenanthroline by spectrophotometry.

### Biology ( Ms.Sue help)

Ms.Sue I am sorry for not understanding you but I read your post and I still don't understand what the answer is. All I was asking for was a yes or no answer to my question. Autosomes are _______ chromosomes. A. abnormal B. homologous C. haploid D. nonsex Is it B?

### Art im so sorry whoever is reading this

sorry it was about her i needed the painting of her by Ben Quilty what feeling are expressed in the painting still are there any websites please

### Physics repost

I apologise for reposting this question but it is still not working out for me. I know that: speed of light c=3.0x10^8 Time interval delta t=0.19x10^-9s The relationship between actual time and roudtrip distance is d=ct Also if there is and uncertainty of delta time, then it ...

### Physical Science

if you tear a piece of material in haft, how is the density affected? sorry i repost it, just the title

### Chemistry

Sorry DrBob22, I wasn't sure if you saw my last post. But, I am still a little confused. Here's the info: Antacid Brand: Life Concentration of HCl: 0.1845 M Concentration of NaOH: 0.1482 M Trial 1: 1.Mass of Table: 1.2173g 2.Volume of HCl added: 75.0 mL 3.Milliomoles of HCl ...

### Maths Help !!!!!!!!!!!!

Hello I'm in grade 9 and i still get confused with the expressions and how to make then in maths although i'm queit very bright ! Any tips on this please thanx Practice. We learn by experience. You may want to buy an extra workbook at the bookstore, which has answers so you ...

### Physics repost please check

Good morning. This is a repost. The system is telling me my calculations is incorrect. I thought a fresh pair of eyes would help. Please tell me what I am doing wrong. Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. ...

### Physics

Sorry for the repost, i made a typo in the original post's subject. A dry water well is 1.5 m in radius and 5.0 m deep. In order from lowest to highest, the fifth resonant frequency of this well is closest to ... I know that it is an open-closed system, but how would we take ...

### Mathematics

9A. Solve the inequality.Show all steps.15 > 7 - t/3 9B. Check your work. Hi. I'm not trying to cheat. I don't understand the equation. If you see another question by me with the same question, I'm sorry. I had hit submit and it wasn't there. Sorry.

### MATH Introduction to Math Skills and Strategies

Evaluate when x+y/3 when x=17 and y=4 sorry had to repost the question thank you

### English- schools of literary criticism

Hi there, I've really been trying to understand the theory of postmodern criticism and modern criticism, but I still can't seem to understand what it is. I've been researching on the web, & it's still not very clear. I hope someone can help me out here. thanks so much.

### Pre-Algebra [repost]

I'm sorry I had to repost, but this is urgent and i need it done by today!! Can someone please show me how to do these problems? I've been trying but I'm having a hard time... 1.Simplify the expressions on each side of the equation to obtain an equivalent equation: 5x + 12 + ...

### Chem Urgency

Can you explain what the pseudo-gas configuration is? I have the definition but I still don't understand. I have the example.. Sn([Kr] 5s24d105p2) Sn4+ ([Kr]4d10)+4e- I understand the first part but I don't understand the second.

### 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 ...

### economic - emergency

Question concerning production function - Cobb douglas. Given is: y=(0,2K-1 + 0,8L-1)-1 If wk = wL =1, what will k and L be? Now suppose again: y=(0,2k-1 + 0,8L-1)-1 and z=K1/3*L2/3. Is product y or z always more demanding to capitals (in case of labour)? if not, find where % ...

### chemistry -repost

Still can't figure this one out-- sorry for reposting, this is the last post, if someone has time to review this question and see if they can figure out how the textbook got 1.0x10^-7 seconds Iodine combines to form I2 in liquid propane solvent with a constant of 1,5 x 10^10 L...

### REPOST biochem

i don't understand this why can carboxyl and phosphate groups act as acids? as in, what makes an acid?

### Physics

3Mhz = 2db Attenuation in 1cm. What is attenuation of 6 MHz, 0.5 of same tissue? Again,(sorry, but thank you) I know the answer is 2 db, but I do not understand how? Can you explain?

### algebra 2

simplify 27^(-(2)/(3)) I know the answer is 1/9 but I don't understand how to solve it. I looked it up but I still don't understand. HELp!!

### WHY?

WHy are my questions being deleted? plz help me..i didn't mean to be rude :( Repost please. Please post under just one name. Posting several questions under differing names (Julia, Steph, etc) is not conductive to a healthy relationship to those volunteering to assist you. ...

### Physics

Ok so I am not so bad at physics but I find it hard to understand formular like how to use this one mu *m*g= I know its somewhat related to friction but what is the mu stand for and g too IF someone could plzz translate these symbols to words I would really appreciat it Sorry ...

### math

2Tons=____oz Try the method DrWLS or I showed you. Then repost if you don't understand but tell us what you are having trouble with.

### math

How many two digit numbers are there in base 5. I really don't understand how to figure this out. I know it's been asked already, but I still don't understand it.

### Physics repost please check

Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final -T initial) (2531J - 1101J) = 3/2(3.0mol)(8.31)(T final - 345K) ...

### Spanish-Please check and clarify

Could someone recheck this-I don't understand the two follow up answers because they seem to contradict each other-Maybe its the question or wording I'm confused about but I still don't understand if this is true or false. I thought it was false.I'm sorry to be so thick about ...

### DrBob222 physics

A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 27.2 ° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 53.7 kg, and the coefficient of kinetic friction ...

### Math(repost of #2 of last ?)

Write XY(with line over it) as the sum of unit vectors for X(8,2,-9) and Y(-12,-1,10). There's an example just like this in my book but I really don't understand it.

### calculus

f'(x) < 0 if |x| < 1 And apparently this means f is decreasing on (-1, 1). I don't understand this. I know f'(x) < 0 means the function is decreasing. But I don't understand the absolute value. It means I can put -1 or 1 inside, but wouldn't it still be 1 = 1 and not ...

### calc

find derivative using limit definition: f(x) = x - sqrt(x) so f'(x) = lim h->0 [f(x+h) - f(x)]/h but I keep trying to solve by multiplying by the conjugate but I can't figure it out..there's nothing that can be cancelled or anything and I can't get the derivative sorry this...

### English

Is it okay if I use your cellphone? 1. I'm sorry, but it's broken. 2. I'm sorry, but it is out of battery. i need to charge it. 3. i'm sorry, but I can't use it at the moment. Where can I charge my cellphone. 4. i'm sorry, but it's not mine. I have to return it. 5. I'm sorry, ...

### Physical Science (repost for drwls)

OK, I've been trying my best and for 3 I got B and for five I got B...? 4 still seems really tricky to me! -MC

### Math

Im sorry for bombarding you guys with questions. I've only needed help with 3 of 40 so far.. Anyways, moving on! 3! = 3 * 2 * 1 4! = 4 * 3 * 2 * 1 5! = 5 * 4 * 3 * 2 * 1 30! = 2^x * N where N is odd. What is the value of x? I have no idea where to start, but reading the rest ...

### chem -repost for bobpursley

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...

### accounting HELP

I know what the moral standards approach is, but what I do not understand how a stakeholder impact analysis might be done using the moral standards approach. Can somebody explain how to do this? I have already gooled it and still did not understand it. I just need it explained...

### Euclids Algorithm

Sorry this is a really stupid question. Ive been going back to basics and im a bit lost (probably tired so I cant see the obvious) so im working out 87v+38w=d ive done the basics pretty well and have d=1. Now backwards substitution is spinning my head a bit. 11=87-2*38 5=38-3*...

### Hottie

If you want to be banned from this site, keep it up. sorry about my brother. He always tries to get himself in trouble. My mom just banded him from the computer. Sorry and hope you can forgive him. SORRY

### repost Dog breeds

Sorry I didn't give my answer before Which of the following herding dogs would be the most difficult to train? A. Cardigan Welsh Corgi B. Australian Cattle Dog C. Bearded Collie D. German Shepherd My answer is A

### physics repost

The electricity received at an electric substation has a potential difference of 2.80 x 10^5 V. If the required output is 440 V, what should be the ratio of the turns of the step-down transformer? I know the transformer equation is: Is/Ip = Vp/Vs = Np/Ns "use that equation to ...

### Physics

A house with its own well has a pump in the basement with an output pipe of inner radius 6.4 mm. Assume that the pump can maintain a gauge pressure of 420 kPa in the output pipe. A showerhead on the second floor (7.5 m above the pump's output pipe) has 38 holes, each of radius...

### Physics

A house with its own well has a pump in the basement with an output pipe of inner radius 6.4 mm. Assume that the pump can maintain a gauge pressure of 420 kPa in the output pipe. A showerhead on the second floor (7.5 m above the pump's output pipe) has 38 holes, each of radius...

### CHEMISTRY REPOST

Calculate the concentration, in percent by mass, of a refrigerant brine solution which is 4.03 M in NaCl with a density of 1.116 g mL-1. detailed answer, please, i don't understand how to do this at all!!!

### French/SraJMcGin

Sorry, a little more about liaison svp. You explained that it is ok to have a liaison between "vais" and "à" but how about "tu vas à" and "ils vont à"??? Would there still be a liaison??? And there isn't a liaison when I say "tu manges une poire", or " nous mangeons une ...

### math (precalc)

let F(x)=x-1/3x find f(a+h)-f(a)/h sorry if this is difficult to understand.

### repost math question

An aircraft flew 6 hours with the wind. The return trip took 7 hours against the wind. If the speed of the plane in still air is 276 miles per hour more than the speed of the wind, find the wind speed and the speed of the plane in still air. The wind soeed was ______ mph.

### Creative Writing

"I'm sorry," her voice was broken by her tears, "I'm so, so sorry!" Is that line written properly, or would you write it like [ "I'm sorry." Her voice was broken by her tears. "I'm so, so sorry!"]

### electrodynamics - max radiation angle

can anyone offer advice to find ƒÆmax after one has found that cosƒÆmax=[ã(1+15ƒÀ2)+1]/3ƒÀ ? I do not really understand the approximation given where ƒÀ=1-ƒÃ Thanks Sorry ƒÆ ----> theta ã -----> square root ƒÀ -----> beta ƒÃ - ----> E ...

### Math 9

My family went to starbucks. We ordered 3 drinks. My daughter's drink was .90 cents less than my drink and my sons drink was $2.20 more than my drink. The total bill was $12.90. How much was each drink? Use algebra. Please help me, thanx sorry I had to repost this question. i ...

### Physics repost

Suppose you wish to make a solenoid whose self-inductance is 1.2 mH. The inductor is to have a cross-sectional area of 1.2 10-3 m2 and a length of 0.048 m. How many turns of wire are needed? Can you please clarify this for me. When I first post it my reponse was: # turns= # of...

### Physics repost

Four resistors of 10.0 each are connected in parallel. A combination of four resistors of 10.0 each is connected in series along with the parallel arrangement. What is the equivalent resistance of the circuit? A)80.0 B)40.4 C)40.0 D)42.5 This is all I understand. Can you ...

### Chemistry

Ermms just cant get my head around this question kinda bugging me :( Solid Sodium Hydrogen Carbonate dissolving in water i know its a dissociation reaction but i don't really have an idea where to split the compound. sorry about the repost, im new to this site and i aint ...

### TO MS SUE

oops i fogot to say that it was the french revolution not the american one ... sorry that was my fault. CAN U STILL HELP ME :)

### question repost damon

Since some tutors don't check back, i want to repost this to damon: what percent more than 1/3 is 3/5? It said 3/5 was wrong, and I tried but i don't know what happend

### English

Why don't we go to the park together? 1. I don't feel like it. 2. I'm sorry,but I can't. 3. I'm sorry I can't. 4. Sorry I can't. 5. Sorry, but I can't. 6. I'm afraid I can't. 7. I'm afraid, but I can't. 8. Afraid I can't. 9. I'm afraid that I can't. ================== There ...

### TO : Brie/Religion

I just went under dictionary and this is what it came up with. i hope this helps What is an apologist? Definition: defender of belief: somebody who defends a doctrine or ideology IN other words: Synonyms: defender, supporter, ally, protector, champion, advocator I looked it up...

### sra McGuin

so sorry - your answer confused me! thanks for helping me understand better

### English

Sorry, I can't see you. ================== What does this sentence above mean? #1 or #2? Is the person blind? 1. Sorry, I can't meet you. 2. Sorry, I am not able to see you.

### English

Here are other sentences I need to check. I really hope you can check them, Writeacher. 1) blamed my friend Peter for breaking some plates, but the real guilty was me. I’m quite independent of my parents because I do a lot of things without their help. 2) I’m not ...

### Home Economics

How come yall never answer my questions? I'm sorry, but I don't see any other home economics questions posted by Mirayah. Please repost your question and I'm sure someone will answer it.

### English

I'm sorry to ask this again but I still don't know what to put as examples of hope and hopelessness from Act One in A Raisin in The Sun

### algebra

reduce to lowest terms 75a^2b ____________ 25ab&2 Is the answer 3a ____ b From the other two I did you should see how it is done. If you don't undersand, repost with details about what you don't understand. We want you to be able to do these by yourself.

### trig-reply to Reiny

RE: (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) is an alternate representation for, 1 / ( 4 tan (x/2) + 2 ) Thanks for your help, sorry I posted 3 times, I thought you didn't understand what I needed. I really do appreciate your time spent. just for your FYI, if you are ...

### Physics

A planet has two satellite moons. Moon X has an orbital period of 2.13 days. Moon Y has an orbital period of about 3.53 days. Both moons have nearly circular orbits. Use Kepler's third law to find the distance of each satellite from the planet's center. The planet's mass is 2....

### Math

Hello, could someone please go over the steps for this question? Thank you! 1. Find the circumference. Leave your answer in terms of pi. The middle line going through the circle is 8.4 (I'm so sorry I don't know the name of the line, brain fart). A) 12.6 pi cm B) 4.2 pi cm C) ...

### Physics again sorry

A solenoid of 200 loops of wire that cover a length of 0.1 m. The solenoid carries a current of 4.0 A. What is the strength of the magnetic field inside the solenoid? In this instance do I assume that this time r is 200 x 0.1? Or is it still just 0.1 and I ignore the 200?

### Physics helpp!!

A baseball is thrown horizontally off a cliff with a speed of 24 m/s. What is the horizontal distance, to the nearest tenth of a meter, from the face of the cliff after 2.8 seconds? To the nearest tenth of a meter, how far has it fallen in that time? So is 24 m/s Vx or Vox? Do...