Wednesday

November 25, 2015
Number of results: 67,126

**Physics**

For non-ideal oscillators (such as a real pendulum) energy is lost and the amplitude (which is the maximum displacement) is no longer constant but also decreases with time. How fast the energy lost is described by a TIME CONSTANT, τ = m/b. Typically after ONE time ...
*January 31, 2014 by Ike*

**Lost in Physics**

The strength of an electric field at 5.0 cm from a point charge is 100.0 N/C. What is the magnitude of the source charge? Show work so I understand how to do it. E=kQ/r^2 solve for Q, you have r, E What do I do NOW? I am lost
*May 19, 2012 by Pat*

**math**

On each of four consecutive plays in a football game, a team lost 11 yd. If lost yardage is interpreted as a negative integer, write the information as a product of integers and determine the total number of yards lost.
*March 16, 2010 by kirk*

**pre-algebra**

A football team gained 4 yd, lost 2 yd, gained 11yd, lost 8 yd, and then lost 9 yd. Find the net gain or loss.
*September 16, 2012 by emily*

**Chemistry**

Is heat lost in heating water and ice? No. Entropy is lost, but heat energy is not lost.
*December 3, 2006 by Lisa*

**physics**

In a house the temperature at the surface of a window is 20.1 °C. The temperature outside at the window surface is 2.72 °C. Heat is lost through the window via conduction, and the heat lost per second has a certain value. The temperature outside begins to fall, while the ...
*November 17, 2014 by Anonymous*

**Physics**

In a house the temperature at the surface of a window is 22.3 °C. The temperature outside at the window surface is 2.82 °C. Heat is lost through the window via conduction, and the heat lost per second has a certain value. The temperature outside begins to fall, while the ...
*August 22, 2015 by Anonymous*

**English**

How would you paraphrase this aphorism? A little neglect may breed mischief,for want of a nail the shoe was lost,for want of a shoe the horse was losted,for want of a horse the rider was lost, for want of the rider the battle was lost.
*September 23, 2007 by jen*

**Math**

In 2000 17 million workdays were lost due to strikes and labor disputes. In 2001 there were only 1 1/5 million days lost. How many more workdays were lost in 2000? 15 4/5?
*October 30, 2012 by Jerald*

**statistics**

Lost Luggage in Airlines Transportation officials reported that 8.25 out of every 1000 airline passengers lost luggage during their travels last year. If we randomly select 400 airline passengers, what is the probability that 5 lost some luggage?
*March 31, 2012 by lela*

**algebra**

I am lost on solving this problem 3x+8=8x-5x+10 I know the next step is 3x+8=3x+10 I am lost after that
*March 24, 2010 by nala*

**English/ Help**

Which of the following sentences is an example of second person narrative voice? A. You became lost in a labyrinth of lies and deceptions. B. It was a labyrinth of lies and deceptions in which she was lost. C. He was lost in a labyrinth of lies and deceptions. D. I became lost...
*August 4, 2014 by Dulce*

**Physics**

A 2.00 kg box slides down a rough incline plane from a height h of 1.99 m. The box had a speed of 2.77 m/s at the top and a speed of 2.34 m/s at the bottom. Calculate the mechanical energy lost due to friction (as heat, etc.) If I were to calculate the energy lost, it would be...
*September 30, 2015 by Ronnie*

**Math**

1. Find the value of k so that 2, k^2, 8 form a geometric sequence. 2. Water is leaking from a water tower. On the first day, two gallons were lost. The leak is getting progressively worse and the amount of water lost triples each day. How many gallons would be lost on the 8th...
*October 7, 2014 by Reyna*

**Physics-Totally lost**

I'm totally lost on this one- the earth is surrounded by an electric field with a strenth of 100 N/C at the surface. Its electric properties are the same as a point charge located at its center. How would the gravatational force and electrical force compare foor an electron at...
*April 7, 2011 by Rafaela*

**Algebra**

the problem is to graph 3x - y < 2 x + y > 2 my solution is y = 3x - 2, y = -1x + 2 I,m lost at where my lines ar drawn. In y = 3x - 2 (y line is 3) and y = -1x +2 (y line is -1) or am I totaly lost. After continued effort I beleive 1st equation m = 3 and y-intercept is...
*May 27, 2007 by Sissy*

**Written Communication**

What kinds of unwanted reactions might you get from readers of your messages? What steps would you take to ensure that the purpose of your message (whether informative, negative, or persuasive) is conveyed to your readers? It's extremely important to express yourself clearly ...
*April 21, 2007 by Frankie*

**English/grammar**

Semicolon. 2a. The Bears lost the Super Bowl to Indianapolis; worse yet, I lost a bet with my brother about the outcome of the game. 2b. The Bears lost the Superbowl to Indianapolia; worse yet; I lost a bet with my brother about the outcome of the game. Which is correct for ...
*November 30, 2008 by Dorothy*

**maths**

At a fun fair, each mother there had brought 2 children. At the end of the day, it was found that 36 mothers had lost one or both of their children and 62 children had lost their mothers. How many mothers lost only one of their children and how many mothers lost both of their ...
*September 2, 2013 by coran*

**physics**

A 1 kg mass moving to the right at a speed of 10m/s collides head-on in a perfectly inelastic collision with a stationary 2kg mass. How much KE is lost during the collision? First I found V_f to be 3.3m/s then I found KE_i=1/2m_1v_1i^2 +1/2 m2V_2i^2 =1/2(1)(10)^2 +1/2(2)(0)^2...
*October 24, 2007 by Tammy*

**Biomass increase !**

Can anyone help please, Can anyone help me to calculate the increase in biomass in each of the three groups, Field mice Ingested 107Kj m-2 y-1 and lost 105 kj m-2 y-1 in respiration & faeces Grasshoppers ingested 444 kj and lost 374.3 kj and small birds ate seeds 60 kj and ...
*December 30, 2006 by Freddo*

**Physics**

An object is 21 cm in front of a diverging lens that has a focal length of -13 cm. How far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 1.5? my work: 1/di=(1/-13)-(1/21) di=-8.02 m=8.02/21 m=.381 m2=-.381/1.5 m2=-.254...
*April 8, 2015 by Abigail*

**Math **

Jared's football team lost a total of 12 yards during 4 plays of the game. They lost the same number of yards during each of the plays. What is an integer that can represent the number of yards lost during each play?
*March 11, 2014 by Carl*

**Statistics**

How do I plug this into the Binomial Probability Formula? prob(lost) = 5/1000 = 1/200 prob(not lost) = 199/200 prob( 2 of 22 are lost) = C(22,2) (1/200)^2 (199/200)^20 = .005224..
*March 9, 2014 by Brenda*

**MATH**

7. Tina lost 3 pounds on the first week of her diet. She gained a pound on the second week, and then lost 2 pounds a week during every week afterwards. She has been dieting for a total of 13 weeks. How many pounds has Tina lost in all? A. 26 pounds B. 24 pounds C. 22 pounds D...
*May 15, 2013 by lola*

**Physics-Please help!**

I don't want someone to do this for me-I'm just totally lost and don't even know where to start-I'm totally lost on this one- the earth is surrounded by an electric field with a strenth of 100 N/C at the surface. Its electric properties are the same as a point charge located ...
*April 7, 2011 by Rafaela*

**physics**

A)When the energy input to gas fired power station is 1000MJ,the electrical energy output is 300MJ.What is the efficiency of the power station in changing the energy in gas into electrical energy b)what form does the 700MJ of lost energy take c)what is the fate of the lost energy
*August 3, 2011 by Luc*

**math**

Jose was playing a game with marbles.In the first round ,he lost 1/4 of his marbles.In the Second round,he lost 1/3 of his remaining marbles.In the third round,he lost 1/2 of his remaining marbles.He gave 1 marbles to his friend shavana.He had 1 marble left. How many marbles ...
*March 3, 2012 by Adi*

**equation**

n represent the number of games lost, write an equation for: a) A team won three times as many games as it lost. It played a total of 52 years. b) A team won 20 games more than it lost. It played a total of 84 games. c) A team won 15 games less than twice the number lost. It ...
*January 18, 2008 by jen*

**science**

Which statement best compares an atom to an ion? A.An ion is an atom that has lost its charge. B.An ion is an atom that has gained or lost protons. C.An ion is an atom that has gained or lost electrons. D.An ion is an atom that has a different number of neutrons.
*January 24, 2014 by victoria*

**Math**

The football team has played 11 games. They lost 2 fewer than they won. They lost 4 times more than they tied. How many games did they lose,win and tie?
*September 3, 2015 by Mary Evelyn*

**english**

I am looking for the correct sentence use of the Semicolon 20a. The Bears lost the Super Bowl to Indianapolis; worse yet, I lost a bet with my brother about the outcome of the game. 20b. The Bears lost the Super Bowl to Indianapolis; worse yet; I lost a bet with my brother ...
*October 20, 2009 by Leesa*

**Physics**

A 79.0-kg fullback running east with a speed of 4.00 m/s is tackled by a 93.0-kg opponent running north with a speed of 3.00 m/s. (a) Why does the tackle constitute a perfectly inelastic collision? (b) Calculate the velocity of the players immediately after the tackle. ...
*October 4, 2011 by Allie*

**English**

1. I lost the ring that he gave me. 2. I lost the ring that he had given me. (Which one is correct? Are both OK?)
*April 12, 2012 by rfvv*

**physics**

A generating station is producing 1.3*10^6 W of power that is to be sent to a small town located 7.0 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 5.0*10^-2 /km. (a) Find the power lost in heating the wires if ...
*February 20, 2008 by rick*

**physics**

A generating station is producing 1.2 x 106 W of power that is to be sent to a small town located 4.2 km away. Each of the two wires that comprise the transmission line has a resistance per length of 5.0 x 10-2/km. (a) Find the power lost in heating the wires if the power is ...
*October 20, 2011 by shaknocka lewis*

**Math**

Tina lost 3 pounds on the first week of her diet. She gained a pound on the second week, and then lost 2 pounds a week during every week afterwards. She has been dieting for a total of 13 weeks. How many pounds has Tina lost in all? A. 22 pounds B. 24 pounds C. 20 pounds D. 26...
*October 29, 2013 by Cassie*

**science**

can energy be lost or does it transfer somewhere else? I thought energy can be lost but i'm just checking.
*May 30, 2011 by Anonymous*

**Physics**

A 70.0 kg base runner begins his slide into second base while moving at a speed of 4.0 m/s. The coefficient of friction between his clothes and Earth is .70. He slides so that his speed is zero just as he reaches the base. How much mechanical energy is lost due to friction ...
*December 5, 2006 by Becca*

**Chemisty**

Im totally lost on how to do redox reactions. Can any one show me the steps on how to do MnO4-1 +C7H60 => Mn2 +c7H6O2? im trying to study for a test and im totally lost. thanks in advanced.
*May 31, 2010 by Kelly*

**Physics (PLEASE HELP)**

A generating station is producing 2.00 106 W of power that is to be sent to a small town located 7.0 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 5.00 10-2 /km. (a) Find the power lost in heating the wires if ...
*February 12, 2012 by DCM*

**spanish**

assignment Escribe las frases en espanol. 1. We forgot the homework. ( literalmente: "The homeowrk was forgotten "on us") _____________________ 2. You lost money. ( the money was lost "on you") ______________________ I AM VERY CONFUSED
*November 1, 2008 by sam*

**spanish**

assignment Escribe las frases en espanol. 1. We forgot the homework. ( literalmente: "The homeowrk was forgotten "on us") _____________________ 2. You lost money. ( the money was lost "on you") ______________________ I AM VERY CONFUSED
*November 1, 2008 by sam*

**history**

How were the various countries of the world affected economically by WWII? Who came out ahead? Which countries suffered monetarily? Who lost their empires? Who lost the most in human capital?
*November 6, 2008 by Candy*

**Physics (DUE SOON)**

A generating station is producing 2.00 106 W of power that is to be sent to a small town located 7.0 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 5.00 10-2 /km. (a) Find the power lost in heating the wires if ...
*February 13, 2012 by DCM*

**prealgebra**

ron lost 10 points seven times playing a video game. He then lost an additional 100 points for going over the time limit. What was the total change in his score?
*September 10, 2015 by Kenzey*

**Physics URGENT!!!**

A 75.0 kg fullback running east with a speed of 6.00 m/s is tackled by a 82.0 kg opponent running north with a speed of 5.00 m/s. (a) Calculate the velocity of the players immediately after the tackle. (b)Calculate the direction of the players immediately after the tackle.(c)...
*October 17, 2012 by Megan*

**physic**

In a house the temperature at the surface of a window is 25 ˇăC. The temperature outside at the window surface is 5.0 ˇăC. Heat is lost through the window via conduction, and the heat lost per second has a certain value. The temperature outside begins to fall, while the ...
*March 31, 2010 by firous*

**Bus**

Guaranteed replacement cost in a homeowner’s insurance policy means that the insurance company A. guarantees they’ll replace the lost items for you. B. guarantees they’ll pay the current value of items lost. C. will pay you what it costs to replace the items new. D. will pay ...
*March 19, 2014 by Pirurris*

**physics/science**

If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it swing back. The ...
*February 9, 2014 by CC*

**Health Physics**

When work is done by friction, in what form in energy "lost"?
*January 22, 2010 by Shannon*

**math**

Customers lose their bags 8% of the time at airports. 20 random people were watched to see if their bags were lost. Whats the probability that at least 18 of them lost their bags?
*December 14, 2010 by Carly*

**science/physics**

If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it swing back. The ...
*February 9, 2014 by CC*

**Statistics**

Given the following information, determine the 68.3 percent, 95.5 percent, and 99.7 percent confidence intervals. overbar above X equals 4.33 comma SE sub m equals 3 I've looked at the table as recommended. I just do not understand this at all. I'm really lost on this and ...
*December 5, 2013 by Anonymous Do not understand*

**physics**

Is it possible for a collision to occur in which all of the kinetic energy is lost?
*November 8, 2007 by Anonymous*

**physics**

if the initial velocity is .05 m/s and its final is 1.3 m/s then how much energy is lost to friction
*March 23, 2011 by bill*

**Physics**

How much mechanical energy was lost during the ball's fall?
*May 20, 2013 by seth*

**statistics**

approximately 300 millions golf balls were lost in the united states in 2009 assume the number of gold balls lost in an 18 hole is distributed as a poisson random variable with a mean of 5 balls
*February 23, 2013 by Anonymous*

**algebra**

Tony went to the racetrack with $80. He won $15 on the 1st race, lost $12 on the 2nd, lost $6 on the 3rd and won $8 on the 4th. How much money did he have after the 4th race.
*August 28, 2012 by robin*

**Physics**

A basketball of mass 0.70 kg is dropped from rest from a height of 1.22 m. It rebounds to a height of 0.64 m. How much mechanical energy was lost during the collision with the floor? A basketball player dribbles the ball from a height of 1.22 m by exerting a constant downward ...
*November 27, 2012 by Physics*

**Health Physics**

The human body is 20-25 percent efficient. In what form is energy lost?
*January 22, 2010 by Shannon*

**Physics**

How much heat is gained or lost when 200 grams of ice melts?
*October 28, 2010 by John*

**Math**

Losing your bags during airline travel is not all that uncommon. Recently, an airline was sited for losing customers' baggage 8% of the time. A test is conducted by randomly selecting 14 customers for that airline and observing whether they had lost their baggage. Provide ...
*December 8, 2010 by Courtney*

**English**

1. Korea lost at the soccer game by 1:2. 2. Korea lost in the scooer game by 1:2. (Which preposition do we have to use? Are both right?)
*June 7, 2009 by John*

**Math**

A hockey team played 12 games. They won 2 more than they lost. They lost 1 more than they tied. How many games did they win, lose, and tie?
*August 29, 2011 by Byran*

**CHEM 1A**

Can someone please help me..... I have limited reactant formula problem. I am completely lost. 2Ca(s) + O2(g) ----> 2CaO(s) Calculate the mass of Calcium Oxide that can be prepared from 6.87g of Ca and 4.58g of O2. I calculated 2Ca to .171mol and O2 to .286mol, I am lost ...
*September 6, 2014 by Chad*

**college algebra**

find the equation of the line in slope inntercept form. (-1,1) and (-2,1) I know that I have to use m=y^2-y^1/x^2-x^1 which is slope form then I get: m=1-(1)/-2-10 which I substitue m= ? is where I get lost but then I know the next part is: y=mx+b then I am lost from here on ...
*October 28, 2012 by ladybug*

**6th grade, science**

Think about the energy you use every day (running, eating, ...) Where have you seen heat energy being lost? Activity.... Heat lost through
*October 6, 2010 by Victor*

**reading**

ok so im lost in my essay i don't know what to do i can't find one that i like i cahnged my subtopic to how the maycomb disease influenced the arrest, testimony, and verdict in Tom Robinsons trial. but when it comes to writing the body paragraph im lost becuase i don't know ...
*March 23, 2014 by Reina B.*

**Physics**

In one of your rigorous workout sessions, you lost 140 g of water through evaporation. Assume that the amount of work done by your body was 3.8 105 J and that the heat required to evaporate the water came from your body. (a) Find the loss in internal energy of your body (due ...
*December 8, 2014 by Anonymous*

**English**

1. Only after he had lost his health did he realize the importance of it. 2. Only after he had lost his health, did he realize the importance of it. 3. Only after he had lost his health, he realized the importance of it. 4. Only after he had lost his health he realized the ...
*November 21, 2013 by rfvv*

**Math.**

1. At 4:00 A.M. the outside temperature was -28. By 4:00 P.M. it rose 38 degrees. What was the temperature at 4:00 P.M.? 10 2.Three friends decided to exercise together four times a week to lose fat and increase muscle mass. While all three were healthier after six weeks, one ...
*September 9, 2013 by Jerald*

**Physics**

A rubber ball, with a mass of 40.0 grams is dropped from rest from a height of 1.60 m above the floor. It hits the floor, and then reaches a maximum height of 90.0 cm when it comes back up again. In this problem, use g = 10.0 m/s2. a) The collision with the floor causes some ...
*October 27, 2013 by Yasmina*

**physics**

if 20g of steam at 100 c is mixed into 80 g of water at 20 c what is the final temperature if no heat lost
*April 27, 2014 by sara*

**Math 156**

A share of stock sold for $50 on Monday. On Tuesday it lost 5% of its Monday’s value. On Wednesday it lost 10% of its Tuesday’s value. On Thursday it lost 5% of its Wednesday’s value. What percent increase would the share of stock have to have on Friday to achieve its Monday’s...
*September 18, 2010 by Ida T.*

**math**

The Bobcats football team gained seven yards,lost eight yards and than lost seven more yards.what is the net result of these three plays
*September 2, 2014 by treva*

**GEOGRAPHY**

Loss of nutrients- when the trees are removed,the nutrients within them are lost. i need to explain this in my own words.does it mean when the trees are cut down all the nutrients are lost from the tree roots
*January 3, 2009 by KELLIE*

**physics**

A 600-pound boat sits on a ramp inclined at 30 degrees as shown in the attached image. What force is required to keep the boat from rolling down the ramp? Completely lost, never done physics before....
*October 8, 2014 by Eoin*

**Are there even any physics tutors here???**

Sorry if I'm sounding as if I'm whining but I'm getting pretty annoyed at how there are many unanswered physics questions. Literally posted a question two months ago and never got any help... This is kinda annoying because the questions get lost in the large feed
*February 2, 2015 by Sandara*

**University of Rhode Island**

A soccer team played 18 games during the season. They won 12 games, lost 4 games and tied 2 games. What is the ratio of games won to games lost
*June 1, 2012 by Phillip Sullivan*

**statistics**

A researcher was interested in assessing the effectiveness of the Statistics Diet as compared to a regular low calorie diet on weight loss. In the study, obese participants were randomly assigned to one of two groups: (1) the Statistics Diet, which required participants to ...
*May 2, 2014 by Matt*

**physics**

Calculate the energy released in the fusion reaction 2 3 4 1 1 H + 1 H->2 H +0 n. The atomic mass of 3 1 H (tritium is 3.016049 u. I am lost! help please!
*May 5, 2008 by J*

**physics**

a waterfall is 122 m in height. calculate the rise in temperature if all potential lost is converted to heat.
*September 12, 2011 by mini*

**math! please help**

Land growing continuous grain corn as a cash crop loses soil at a rate of 14.0 metric tonnes ha-1 yr-1. This is a fertile soil, which has an organic matter content of 3.8% and nitrogen content of 0.35% (both by mass). a) we did this question before, lost soil=soil mass 14000kg...
*November 12, 2009 by Ramya*

**Statitics**

A Department of Transportation report about air travel that 5 out of every 1000 pieces of luggage are lost by the airlines. You are traveling with a group of people who have 22 pieces of luggage. What is the probability that 2 of these are lost? Set up the equation and plug in...
*March 8, 2014 by Brenda*

**Calculus **

I am so lost, I have no idea what to do next. Find the equation of the tangent line to the graph at the indicated point f(x) =x^2 +x ; a=-1 I started out using f(-1)= (-1+h)-(-1)/h but i am so lost on what to do next. I have tried to look at examples in the book, but i do not ...
*September 25, 2014 by Erin*

**Algebra**

After three plays in which a football team lost 7 yd,gained 3 yd and lost 1 yd, respectively, the ball was placed on the teams own 30 yd line. Where was the ball before the three plays?
*September 6, 2011 by Debbie*

**LA**

2.what is the description of the theme of article lottery winners who lost their millions? A: many lottery winners have lost their money. B:money is the key to the American dream. C: sudden wealth can cause problems.
*May 16, 2013 by bob*

**Biology**

Prokaryotes produce 38 ATP per glucose molecule and eukaryotes produce 36 ATP why? I know that the two are lost, but I am not sure if it is in the processing of the sugars or the transport? Does anyone know where these two are lost or why?
*March 25, 2008 by Vijay*

**Math **

jared's football team lost a total of 12 yards during 4 plays of the game. They lost the same number of yards during each of the plays. What is an integer to represent it?
*March 11, 2014 by Ashley*

**physics**

D=m/V=m/đ•R^2•h Find the density of a 4.2- kg solid cylinder that is 13 cm tall with a radius of 5.0 cm. I am lost on the numbers to plug into this one please help
*March 24, 2012 by jim*

**Physics**

After undergoing through 90 degree compton scattering, the fraction of energy lost by photon is A) 10 % B) 50 % C) 20 % D) Zero E) None
*June 1, 2014 by Fayzan Ahmed*

**Physics**

A man was lost in the woods. He wanders 3 km north, then 7 km east, then 7 km south, then 4 km west. What is the magnitude and direction of his resultant displacement?
*June 12, 2014 by Van*

**ALG@ NEED HELP PLEASE**

Explain how to factor the following trinomials forms: x2 + bx + c and ax2 + bx + c. I am totally lost still I read and read and the concept is lost in my head. Can someone please help me? I know there is more than one way to Factor this.
*March 1, 2012 by KAYG*

**statistics**

transportation officials reported that 8.25 out every 1000 airline passengers lost luggage during their travels last year.if we randomly select 400 airline passengers,what is the probability that 5 lost some luggage?
*March 31, 2012 by lela*

**physics ap**

Sir Lost-a-Lot dons his armor and bursts out of the castle on his trusty steed Tripper in his quest to rescue fair damsels from drag- ons. Unfortunately his valiant aide Doubtless lowered the drawbridge too far and finally stopped it 30 below the horizontal. Lost- a-Lot ...
*November 17, 2012 by helpplz*

**Physics- LOST!**

If the air temperature is the same as the temperature of your skin (about 30.0 C), your body cannot get rid of heat by transferring it to the air. In that case, it gets rid of the heat by evaporating water (sweat). During bicycling, a typical 70.0 kg person's body produces ...
*December 3, 2007 by Jamie*

**physics**

jack measured that his racquet gives a squash ball 45.0J of kinetic energy when he hits it with a particilar shot.he also measures that it has 18.0J of kinetic energy after one bounce off the court wall. what percentage of its mechanical energy does the ball lose while it ...
*May 8, 2007 by Emma*

**Physics**

A sample of charcoal from an archaeological site contains 55 g of carbon and decays at a rate of .877 Bq. How old is it? ok I am totally lost, I don't know where to start
*May 5, 2008 by J*

**physics**

A sample of charcoal from an archaeological site contains 55 g of carbon and decays at a rate of .877 Bq. How old is it? ok I am totally lost, I don't know where to start
*May 5, 2008 by J*