Wednesday

April 1, 2015

April 1, 2015

Number of results: 75,604

**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 ...
*March 1, 2009 by Sukie*

**physics repost**

sorry! I never noticed..the mass should be 52000kg sorry about that!
*October 14, 2007 by Alexis*

**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
*March 20, 2013 by V*

**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 ...
*October 6, 2014 by SkatingDJ*

**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...
*April 6, 2007 by Mary*

**Chemistry**

Sorry, I still do not understand why metals react more vigorously in acids than in water?
*February 4, 2009 by Janice*

**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.
*November 30, 2006 by brooke*

**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 ...
*October 14, 2007 by Alexis*

**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 ...
*April 9, 2008 by Jon*

**Physics Urgent!!!!!**

Sorry to repost this, again, but I still don't understand. Newtons 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 ...
*May 1, 2011 by Abi*

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

Sorry to repost this, again, but I still don't understand. Newtons 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 ...
*May 1, 2011 by Abi*

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

Sorry to repost this, again, but I still don't understand. Newtons 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 ...
*May 1, 2011 by Abi*

**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.
*March 4, 2007 by Margie*

**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.
*February 9, 2009 by Writeacher*

**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 ...
*September 10, 2006 by chris*

**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...
*April 24, 2008 by Chris Adison*

**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...
*April 24, 2008 by Chris Adison*

**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...
*November 22, 2013 by Katy*

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

Sorry to repost this, again, but I still don't understand. Newtons 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 ...
*May 2, 2011 by Abi*

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

Sorry to repost this, again, but I still don't understand. Newtons 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 ...
*May 2, 2011 by Abi*

**About Posting**

sorry for repost ~C
*August 16, 2007 by ~christina~*

**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.
*February 21, 2007 by shivangi*

**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 ...
*July 7, 2008 by Anonymous*

**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?
*August 17, 2011 by mary*

**algebra 117**

repost sorry about that (k^1/8)^-4 oer(k^7)^1/2
*July 22, 2012 by BERNIE*

**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 ...
*September 18, 2011 by iNeedHelp*

**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...
*September 20, 2008 by michelle*

**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...
*September 20, 2008 by michelle*

**gurublue bobpursley and writeacher**

im sorry to have kept on asking thats what i couldnt understand sorry i was getting confused. thankyou so much for your help hopefully i wont ask again!
*October 19, 2009 by daisie*

**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 ...
*November 8, 2006 by Sandro!*

**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.
*September 15, 2007 by smiley*

**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.
*November 2, 2006 by minemine*

**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 ...
*October 18, 2010 by Akhed-To DrBob222*

**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 ...
*October 17, 2007 by Mary*

**Physical Science**

if you tear a piece of material in haft, how is the density affected? sorry i repost it, just the title
*October 11, 2012 by Laruen*

**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 ...
*April 14, 2007 by QA*

**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. ...
*April 20, 2007 by Mary*

**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 ...
*January 27, 2010 by Sammy*

**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
*November 15, 2009 by nikki C*

**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.
*October 4, 2009 by May*

**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 + ...
*May 2, 2009 by mysterychicken*

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

Sorry to repost this, again, but I still don't understand. Newtons 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 ...
*May 2, 2011 by Abi*

**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 % ...
*September 27, 2006 by ellen*

**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 ...
*August 6, 2014 by Nancy*

**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?
*October 27, 2014 by Connie*

**REPOST biochem**

i don't understand this why can carboxyl and phosphate groups act as acids? as in, what makes an acid?
*October 18, 2007 by J*

**Chem Urgency**

Can you explain what the pseudo-gas configuration is? I have the definition but I still dont understand. I have the example.. Sn([Kr] 5s24d105p2) Sn4+ ([Kr]4d10)+4e- I understand the first part but I dont understand the second.
*November 24, 2007 by Sami*

**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 teh mu stand for and g too IF someone could plzz translate these symbols to words I would really appreciat it Sorry ...
*October 17, 2010 by Pablo*

**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.
*March 6, 2011 by jason*

**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.
*November 30, 2006 by brooke*

**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 ...
*February 22, 2011 by BethAnne*

**WHY?**

WHy are my questions being deleted? plz help me..i didnt 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. Rude...
*May 6, 2007 by URGENT PLZ*

**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) ...
*April 16, 2007 by Mary*

**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 ...
*May 20, 2010 by Kelly*

**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 ...
*February 19, 2007 by Susu*

**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.
*April 25, 2009 by Jon*

**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, ...
*March 28, 2011 by rfvv*

**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...
*April 24, 2009 by AW*

**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...
*September 26, 2011 by terra*

**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
*May 3, 2009 by mysterychicken*

**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
*April 1, 2007 by bobpursley*

**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...
*April 17, 2011 by please, help me *

**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...
*April 10, 2012 by Angelina*

**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...
*April 10, 2012 by Angelina*

**French/SraJMcGin**

Sorry, a little more about liaison svp. You explained that it is ok to have a liaison between "vais" and "" but how about "tu vas " and "ils vont "??? Would there still be a liaison??? And there isn't a liaison when I say "tu manges une poire", or " nous mangeons une poire...
*November 12, 2008 by Anonymous*

**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
*October 29, 2008 by Copailia*

**electrodynamics - max radiation angle**

can anyone offer advice to find max after one has found that cosmax=[(1+152)+1]/3 ? I do not really understand the approximation given where =1- Thanks Sorry ----> theta -----> square root -----> beta - ----> E rewritten... Sorry about the ...
*August 18, 2007 by manny*

**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!"]
*September 15, 2013 by Me*

**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 ...
*April 18, 2008 by Anonymous*

**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.
*October 22, 2010 by Anonymous*

**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 ...
*February 6, 2013 by Molly*

**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 :)
*December 20, 2012 by SPIKE*

**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...
*October 9, 2007 by Mary*

**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 dont understand how to do this at all!!!
*November 10, 2007 by keely*

** 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...
*June 22, 2007 by student*

**sra McGuin**

so sorry - your answer confused me! thanks for helping me understand better
*November 1, 2008 by sam*

**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 ...
*April 9, 2008 by Jon*

**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. Im quite independent of my parents because I do a lot of things without their help. 2) Im not independent ...
*April 20, 2012 by Matthew*

**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
*February 17, 2015 by Amy*

**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 ...
*January 3, 2011 by Carol*

**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....
*February 23, 2012 by Angelina*

**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?
*April 26, 2010 by Jill*

**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...
*July 30, 2010 by Anonymous*

**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 dont really have an idea where to split the compound. sorry about the repost, im new to this site and i aint really...
*August 25, 2008 by (:*

**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.
*March 3, 2007 by Mirayah*

**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.
*January 29, 2007 by deborah*

**pre Calculus**

how do you find additional points on a line with a slope of 1/2 and a given point of (7,-2)? im sorry but i still cant get an answer for this question.
*September 7, 2008 by Joseph*

**question repost damon**

Since some tutors dont 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
*September 12, 2014 by Bobby*

**calculus**

Sorry to post this again, but I am still unable to understand it and need help. Please help.1) Using 3(x-3)(x^2-6x+23)^2 as the answer to differentiating f(x)=(x^2-6x+23)^3/2, which I have been able to do, I need to find the general solution of the differential equation dy/dx...
*May 22, 2011 by Claire*

**Physics- drwls 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. Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a ...
*April 19, 2007 by Mary*

**Algebra 2**

Subtract. Simplify by removing a factor of 1 when possible. (9p^b)/p^2-b^2 - p-b/p+b. Thank you. These problems, I don't understand at all. I'm sorry.
*March 10, 2011 by Esther*

**World History**

Hi sorry for another question but How could historians help us understand why two groups of people are in conflict?
*October 22, 2013 by Bilbo*

**francais**

How do you say in english -i am so sorry for every stupid thing ive done please dont hate me i still care about you.
*December 18, 2008 by anonymous*

**physics**

A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.2 s later. If the speed of sound is 340 m/s, how high is the cliff? vo= 0; s=340 m/s; t= 3.2s h=? t1+t2= 3.2 s t2= 3.2-t1 I used Eq: h= vo*t^1+1/2at^2 rearranged eq. h= (4.9)(t)^2 t^2= h/4.9 ...
*May 29, 2014 by Lya*

**physics**

thanks for the help earlier just got a question I'm taking AP Physics B this year does that mean next year I would Take AP Physics C??? I don't know if the material in C convers the same material plus the additional calculus material or what??? Could I take AP Calculus while ...
*August 9, 2009 by physics*

**physics**

What can we conclude from the attractive nature of the force between a positively charged rod and an object? 1. The object has no net charge. 2. Cannot be determined. 3. The object does not have an appreciable negative charge. 4. The object does not have an appreciable ...
*February 20, 2010 by Anonymous*

**math**

what number is 24% of 95. Sorry but i dont understand how to get numbers using percents. another problem im stuck with is what percent of 90 is 60
*February 26, 2009 by Christina*

**RE**

sorry to keep asking please could you give me the defnition of feminism. i dont understand the defintions when i look it up. thanks for all of your help
*October 18, 2009 by daisie*

**Physics repost**

A current of 5.0 A flows for 20.0 minutes through a bulb and delivers 15000 J of electric energy to the bulb. What is the potential difference across the bulb? A)2.5 V B)4 V C)100 V D)100 V (book typo) I was told to do this: energy= V*I*time in seconds solve for v. I don't ...
*April 9, 2008 by Jon*

**Math**

I am having trouble understanding how to reduce fractions to its lowest term... All I can understand is I have to find the lowest number that will divide into both numerator and denominator. How do I understand the solution on how to reduce fractions to its lowest terms? Here ...
*November 1, 2011 by Tonya*

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