# physics, error calculation repost

78,020 results

### physics, error calculation repost

I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if anyone can help me that would be really great. the equation is (1/lambda)=R[(1/n^2final)-(1/n^2initial)] I've never had to derive anything like this ...

### chemistry, physics

What is the most important source of error in the calorimeter experiment? I know few, but I don't know what is the most important source of error. Stirring error the calorimeter is not properly insulated Calculation error Measurement error in volume and or weight

### 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

to determine that force acting on each mass it was assumed that g=9.8m/s^2. The value of g at the place where the experiment is performed may be slightly different from that value. state what effect it would have on the percentage error calculated for the comparisons to test ...

### Repost Repost Bio

I asked this, and didn't get a very helpful response. Question: hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the ...

### Physics

PLEASE HELP, I'm trying to study for a quiz >.< and I don't understand this one question! A fellow student reports his measurements of time for a speed calculation in minutes. How could he express that calculation using SI base units? A)convert minutes to hours and redo ...

### physics

To determine the force acting on each mass its was assumed that g=9.80 m/sec2. The value of g at the place where the experiment is performed may be slightly different from value . State what effect it would have on the percentage error calculated for the comparisons. To test ...

### Physics/Statistics

We're actually learning propigation of error in my chem class, but it seems to be used equally as much in Physics/Stats. My teacher showed us two methods of doing it: REAL Method (Addition/Subtraction): square root[(error absolute 1)^2 + (error absolute 2)^2 +...(error ...

### Repost bio

hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the website :(, search on google liver lab with sand, and it is with a ...

### Calculus (repost)

This problem uses a TI-89 calculator) Find the largest and smallest values of the following function on their given intervals: y=(cos x)^x [-1.5, 4.75] This is what I put in the calculator (home screen): fMin((cos(x))^x,x I -1.5 < x < 4.75 (I = "with" symbol, < is ...

### physics

The length l of a simple pendulum is about 0.5m, and can be measured within 1mm. what accuracy is required in the measurement of periodic time T of 100 oscillations if the error in l and T are to produce equal percentage in the calculation of acceleration due to gravity (g)

### physics

A 3.60 kg object is attached to a vertical rod by two strings as in the figure below. The object rotates in a horizontal circle at constant speed 7.15 m/s. (a) Find the tension in the upper string. 139 . Your response is within 10% of the correct value. This may be due to ...

### physics

A 3.60 kg object is attached to a vertical rod by two strings as in the figure below. The object rotates in a horizontal circle at constant speed 7.15 m/s. (a) Find the tension in the upper string. 139 . Your response is within 10% of the correct value. This may be due to ...

### Statistics

A friend calculates a variance and reports that it is -25.0. How do you know that he has made a serious calculation error?

### grammar

Matching. Each of the following sentences has an agreement error in it. Match the correct type of agreement error to the sentence. *The patient was placed in the wheelchair with the fractured tibia. A. Verb tense agreement error B. Subject/verb agreement error C. Pronoun ...

### Chemistry

What error in calculation would result if, in the procedure for forming the magnesium oxide, some shiny metal remained in the crucible which was not heated any further? Well, wouldn't that throw the weights off which in turn would throw the whole thing off, so that when you ...

### physics pre-lab

By trial and error with your calculator, find the angle theta for which sin theta and theta differ by 5%. This calculation must be done in radians. When you have found theta, express it in degrees. plzzz help thanx

### Math(ANSWERCHECK)!!

percent error formula= |experimental value -accepted value| / |accepted value| * 100% % error = |0.846 g/mL - 0.78948 g/mL| / |0.78948 g/mL| *100% = 7.31 % Is 7.31% correct or was there a calculation mistake?

### Physics 11

In physics we did a lab experiment that involved finding the Heat capacity. the teacher told us that we wont get an exact answer. He wanted us to state the Source of Error. what is a source of Error? He said that it isn't a "human stupidity error" eg. Spilling some hot water, ...

### GRAMMAR

Good Morning- Each of the following sentences has an agreement error in it. Match the correct type of agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e. Parallel structure ...

### CHM Lab

Calibration of a 50 ml buret (10 ml,15 ml,20ml, 25 ml,30ml,35ml,40ml,45ml,50ml)(repeated the procedure 3 times) for experimental ; i have observed vol(ml) , temp.C ,for true i have mass(g), true vol. ml and for calibration i found error ml /correction ml(for each one) i have ...

### Chemistry

Can you please look at my repost. I made an error in my question, so now I need your help for a different part of the question. :) Thanks. -Sadie

### REPOST

CAN someone please give me a good idea as how to find information for this problem: we are supposed to relate physics to movies, and state mistakes or errors found in the movies based on physics principles. I am trying to do Willy Wonka the 1971 version...I need help trying to...

### physics

Perform error analysis on the following formulas: (a)∆ = áô, with errors á on and ô (b)r = 1/C, with an error on C (c)r = 1/n, with an error on n (d)k = Cd/åA , with errors on C, d and A

### Chemistry -repost thank you in advance

I have a bottle of 95% ethanol purchased from the manufacturer. Normally, when it is not stated, does it mean 95% w/w ethanol? I need to prepare 100ml of 40% v/v ethanol solution from 95% ethanol. Please show me the calculation steps. Thanks.

### Chemistry

How do you find Absolute error and how do you find relative error? Absolute error is the difference between the experimental value and the actual value. Relative error, usually expressed as a percent, is the error relative to the correct value. For example, ABSOLUTE ERROR: We ...

### Sentence Agreement Errors

What agreement error would this sentence be? One of the options concerning his future surgeries were discussed with him. Verb tense agreement error, subject/verb agreement error, pronoun agreement error, modifier placement error or parallel structure error

### grammar

The patient was placed in the wheelchair with the fractured tibia. A Verb tense agreement error B Subject/verb agreement error C Pronoun agreement error D Modifier placement error E Parallel structure error My answer is c

### Physics

Hi. Can someone please help me on how to do the propagation of error in physics on variable C, d and A of the following formula: k = Cd/åA , with error on C, d, A

### Physics repost please clarify

The distance between earth and the moon can be determined from the time it takes for a laser beam to travel from earth to a reflector on the moon and back. If the round-trip time can be measured to an accuracy of 0.19 of a nanosecond (1 ns = 10-9 s), what is the corresponding ...

### chemistry

I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results are a very large ...

### chemistry

I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results are a very large ...

### math

Your task is to chose at least ONE of the operations(add,substract,multiply or divide)and design a poster that tells someone how to do a calculation in your chosen operation.Do not just do a poster showing a substraction,for example,you need to explain what to do in any ...

### math

Caitlyn calculated the probability of the complement of rolling a number greater than 2 on a 6-side number cube. She made her calculation as follows. Did she make an error? Explain.

### Grammar-agreement errors

Match the correct type of agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e. Parallel structure error 1. He complains of abdominal, neck, and chest pain as well as the need ...

### Algebra 2: Prob and Stats

A survey of 480 high school students found that 37% had a pet. Find the margin of error. Round to the nearest percent. Use the margin of error to find an interval that is likely to contain the true population proportion. * margin of error = +-5% interval, 37% to 42% * margin ...

### Physics

In successive experimental measurements, the refractive index of a glass turned out to be 1.54, 1.45, 1.53, 1.56, 1.44, 1.54. Calculate: i. Mean refractive index ii. Mean absolute error iii. Fractional error iv. Percentage error

### physics !!

How do I calculate the person of error in Centripetal force if it arises from 1% error of the Radius = 5.4 ?

### University physics

Hi. Can someone please help me on how to perform error analysis on the formulas: r = 1/C, with an error on C.

### physics..

A physical quantity 'x'is calculated from the relation x=a^3b^2/ãcd. Calculate percentage error in x, if a, b, c and d are measured respectively with an error of 1%,3%,4% and 2%.

### physics..

A physical quantity 'x'is calculated from the relation x=a^3b^2/root of cd. Calculate percentage error in x, if a, b, c and d are measured respectively with an error of 1%,3%,4% and 2%

### english

Choose the word needing an apostrophe or an apostrophe and an s. If the sentences is correct, choose no error. 1. Why havent you dotted your j’s? haven’t **** j’s’ no error 2. Ounce for ounce, humans aren’t as strong as most insects. human’s insects’ no error...

### Calculus

Estimate delta(x) using the Linear Approximation and use a calculator to compute both the error and the percentage error. f(x)=cosx a=(pi/4) delta(x)=.06 delta(x)= ______ i got this part and it's -.04242 The error in Linear Approximation is: and The error in percentage terms ...

### Calculus (answer check)

The measurement of the radius of a circle is 16 inches, with a possible error of .25 inches. (Use differentials to approximate the possible propagated error and the percent error. Propagated error= 1.6% Percent error= 4.6%

### statistics please help

A student measures three lengths a, b and c in cm and a time t in seconds: a = 40 ± 5 b = 30 ± 3 c = 20 ± 1 t = 1.2 ± 0.1 What is a+b a+b+c a/t (a+c)/t Calculate (1.23 ± 0.03) + pi Question 9.4. Calculate (1.23 ± 0.03) × pi Can you do a sample calculation of each of ...

### Propagating error

Find the absolute and percent relative error for each calc. b) 81.5 (+/- 0.5) x 40.2 (+/- 0.2)/ 21.8 (+/- 0.2) my answer for absolute error was 150. +/- 200, which is outrageous. Can someone show how they would do it so I can compare and find my mistake? error/(81.5* 40.2/ 21....

### PHP Coding

I got an error with this line. Could anyone check what's wrong? 64 define('QA_MYSQL_TABLE_PREFIX', 'QA_); the error message: Parse error: syntax error, unexpected ''); ' (T_CONSTANT_ENCAPSED_STRING) in /Applications/XAMPP/xamppfiles/htdocs/pujan/qa-config.php on line 69

### Grammar-agreement errors

Match the correct type to agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e. Parallel structure error 1. A small laceration was on the patient's ear that he received during a ...

### Physics, Propagation error

Does anyone know how to find the propogation error for this equation? K_i = 1⁄2 m_b v_i^2 = ½ (.069g)(6.49m/s)² = 1.45(kgm²)/s² Thank you so much!

### English

In this sentence, is there an error in one of the lines or is there no error The hikers caught sight of deers running through the forest no error

### university physics

Derive absolute error in equations: 1)Derive absolute error in (e/m) e/m= 2V/B^2*R^2 2)Derive absolute error in B B=8uN(Inet)/square root 125a

### chemistry

Most top-loading balances used in this experiment measure a mass only to the nearest mg(+_0.001g).? This significantly affects the calculation of R in this experiment. Explain why this is so. How might the procedure be modified to compensate for this systematic error?

### Grammar-agreement errors

Match the Correct agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e. Parallel structure error 1. The restoration appear to be excellent, as do the position of the hooks. ...

### Chemistry (check)

12) Relative error is also called _______ I got accepted value decimal error? Relative error multiplied by 100 is called percent error. Errors are classified as relative or absolute.

### calculation

how do I figure out the calculation of 999, 822 and the date of 5/14/2015 to equal 51981220?

### Statistics

What do SEM (standard error of the mean) error bars tell you? How would you describe them in a figure caption for a graph? I know what regular error bars are, but I can't find any information on SEM error bars!

### Math

Question: 168.72/0.024=7.03 When I do this calculation on paper the above answer is what I get but when I do this calculation on a calculator I get 7,030.00 what I am doing wrong?

### Calculus

Suppose a cylindrical can is manufactured with radius r. The manufacturing process makes the length r imprecise; r can be off by ±0.03 cm. The manufacturing process makes the height of the can precisely equal to three times the radius r (including any error in r, but not ...

### apchemistry

What is the difference between stoichiometric calculation and equilibrium calculation for pH effect on a buffer after acid or base addition?~thanks

### Physics

1.) Describe the proper way to use a meter stick and why this technique is necessary (include an explanation of uncertainty). 2.) What is the difference between percent error and standard error?

### Grammar-agreement errors

Match the correct type of agreement error to the sentence. a. Verb tense agreement error b. Subject/verb agreement error c. Pronoun agreement error d. Modifier placement error e. Parallel structure error 1. Although they seemed inflamed, the site of the previous craniectomy ...

### science

Please help this is worth a big grade and is due tomorrow stoichiometry calculation- Na weighs .53g water is 91.92 ml Patm= 30.03 in Hg Gas Law Calculation same info as above Balanced Chem. equation same info as above Unit conversion setup and calculation same info as above

### 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

### trig

find the exact value given that cosA=(1/3) in quad I, sin B=(-1/2) in quad 4, and sin C=(1/4) in quad 2 tan(B+C) ? At the end of my equation I had (sqrt45/15) over (1-sqrt15/15) , how do I rationalize or did I make an error in calculation

### 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.

### Chemistry

What should be the number of significant figures in the following calculation? It's an error calculation which is absolute value (True value - experimental value) / true value * 100 so it would be: absolute value [-601.7 - (-587)] / -601.7 * 100 Should the answer be 2.44 or 2....

### physics

Percentage error in displacement time and mass are 2%, 1% and 3%. Find percentage error in the measurement of force.

### math

While performing a calculation, you divide a number by 5 two times to get the answer 12. You should have divided by 5 only once. What is the correct result of the calculation

### english - repost last

11) (A) No Chinese or Indian object--indeed, (B) no object of any kind from Asia--has been found in the Americas in archaeological levels (C) that date to pre-Columbian times. A) No Chinese B) no object of any kind C) that date to D) No error My answer is ( C ) 12) Very few ...

### algebra 1 function question

given functions f(x) = 3x-5 and g(x) = 1/3 - 4/3x correct the error g(-3) = 1/3 - 4/3(3) = 1/3-4 = - 3 2/3 error i believe is 3 should be -3 so g(-3) = 1/3 - 4/3(-3) 1/3- (4/3 times -3/1) = 1/3 -( -12/3)= 1/3 +12/3 = 13/4 = 4 1/3 other one: f(1) = 1/3 - 4/3(1) = 1/3 - 4/3 = -3...

### calculus

a spherical balloon's radius was measured to be 30 cm with a maximum possible error of 0.2 cm. a) use differentials to estimate the maximum error in the calculated volume. b) what is the relative error?

### Earth Science

A student finds the density of an ice cube to be 0.80g/cm3; it is actually 0.90 g/cm3. What is the percent deviation (percent error) in this calculation? (1)6 percent (2)11 percent (3)13 percent (4)88 percent (2)?

### statistics

The power of a significance test for a particular value of the parameter is computed to be 0.93. Which statement below is true? a) The probability of committing a Type I error is 0.07. b) The probability of committing a Type I error is 0.93. c) The probability of committing a ...

### Science [repost]

What is the difference between an ionic bond and a covalent bond? I just keep forgetting which one is which...any easy way to remember these? PS> I know that you're not supposed to repost until 24 hours but I really need this answer! Thanks -MC

### biochemistry

perform the calculation required for100ml of 0.2 M sodium acetate buffer of pH 5.0. If you are given a bottle of sodium acetate acetate(mw =82 and a bottle of concentrated HCl of normality =11.7). After the calculation, prepare the buffer , check the pH of your calculation and...

### math

1.Find the value of this fraction computation: 6(1/2 + 2/3+3/4) Calculation With Distribution (Show all steps.) Calculation Without Distribution (Show all steps.) 2.Find the perimeter of a rectangular area with a length of 13 inches and a width of 7 inches. Calculation With ...

### math

plzz help I do not understand a certain computer can perform 10^5 calculation per second. how many calculation can it perform in 10 seconds???

### Chem

How many moles of ammonium ions are in 8.794g of ammonium carbonate? I got .1832 as an answer and I was told that I was very close and I just may have done some kind sigfig or calculation error but I have no idea what it is since I did this problem so many times only to get ...

### statistics

Suppose that fÈ and fX|È are described by simple closed-form formulas. Suppose that È is one-dimensional but X is high-dimensional. a) Suppose that a specific value x of the random variable X has been observed. Is it true that the calculation of the LMS estimate will always...

### Physics, error derivation

I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if anyone can help me that would be really great. the equation is (1/lambda)=R[(1/n^2final)-(1/n^2initial)] I've never had to derive anything like this ...

### Accounting

7. If the net present value of a project equals zero _______________. (Points : 1) the project should be considered the project should not be considered then someone made an error in the calculation then a balanced scorecard should be adopted to compensate

### repost physics E&M please

A battery with EMF 90.0 V has internal resistance R_b = 8.68 Omega. What is the reading V_v of a voltmeter having total resistance R_v = 485 \Omega when it is placed across the terminals of the battery? Express your answer with three significant figures. V_v =88.4V This is the...

### Business Research

What is the easiest way to reduce sampling error? What is the relationship between sampling error and the generalizability of the results of a study? Finally, what hap- pens to sampling error as the size of the sample increases? Why?

### math

okay so I have two questions that i'm completely stuck on ;-; 1.You want to buy three books that are on sale at 20% off. The original prices of the books are $2.50, $4.95, and $6.00. How much will you save? Calculation With Distribution (Show all steps.) Calculation Without ...

### Writing...Grammar

Is the common error in the following sentence a dangling modifier? Having risen because of the rains, the hikers were unable to cross the river. Yes. As Ms. Sue said earlier, the phrase ("Having ... rains") needs to be close to what it modifies. So ask yourself: What has risen...

### calculus

The measurement of the radius of a circle is found to be 14 inches, with a possible error of 1/4 inch. Use differentials to approximate the possible error and the percentage error in computing the area of a circle.

### Calculus

The radius of a circular disk is given as 51 cm with a maximum error of 0.04 cm. Use differentials to estimate the maximum error and percent error in the calculated area of the disk.

### Statistics

You are responsible for quickly fixing your company¡¯s computer system when it crashes. You know that there are three possible sources of errors in the system: the disk drive, the memory and the operating system. From an analysis of historical data, you find that 50% of the ...

### Algebra 8th

Find the greatest possible error for each measurement. 953 mi 0.5 mi Find the greatest possible error for each measurement. 1 3/4 c not-- 1/4 c Find the greatest possible error for each measurement. 12.3 L 0.05L Find the greatest possible error for each measurement. 4 1/2 oz 1...

### Biology

In which case would a widely accepted scientific idea MOST likely be revised? A) when an error is found in a previous calculation B) when scientists calculate a quantity with greater accuracy C) when several well-tested findings go against the accepted idea Eliminate D) when ...

### chemistry

Suppose you designed an experiment in which you burned a known quantity of magnesium in air. You used the product to determine how many moles of oxygen would react with the known number of moles of magnesium. Why would burning magnesium in air cause a source of error for this ...

### AP Chemistry

Suppose you designed an experiment in which you burned a known quantity of magnesium in air. You used the product to determine how many moles of oxygen would react with the known number of moles of magnesium. Why would burning magnesium in air cause a source of error for this ...

### Statistics

In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that 10% of the people in this sample had pinworm but the margin of error for the population estimate was too large. They want an estimate that is in error by no more than 1.5 percentage points at ...

### Calculus Help Please!!!

The circumference of a sphere was measured to be 80 cm with a possible error of 0.5 cm. 1) Use differentials to estimate the maximum error in the calculated volume. (Round your answer to the nearest integer.) 2) What is the relative error? (Round your answer to three decimal ...

### Chemistry

Do you need to do uncertainties on percent error? It doesn't make sense to have "percent error on percent error".

### Statistics

A test is made of H0: mean = 27 versus H1: mean < 27. The true value of the mean is 27, and H0 is rejected. Is this a Type I error, Type II error, or a correct decision? How do I determine which is which??? Question 4 options: 1) Type II error 2) Type I error 3) Correct ...

### 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 ...

### chemistry

We have 1 mol of N2 gas that is heated at constant pressure from 300K to 5770K on the surface of the sun. i) Find H and S given that P for nitrogen is (25.7 + 0.0130T) J/mol-K. ii) Now, redo your calculation assuming that the second T-dependent term in the P ...

### Physics

A particle is moving at 0.75c relative to a lab on Earth. By what percentage is the Newtonian expression for its momentum in error, i.e., how wrong is the classical formula? (The percentage error is the difference between the erroneous and correct values, divided by the ...