23.3 Maple TA

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23.3 Maple TA

Post  PHYZ on Sat Mar 28, 2009 4:21 am

QUESTION 1
Add the KEGIVEN TO THE REST ENEGRY GIVEN. answer is negative

QUESTION 2

Answer= [1/(sqrt(1-(number given^2)))] -1
ANSWER IS NEG

QUESTION 3

#GIVEN * 1.66E-27* 9E16=ANSWER
ANSWER IS NEGATIVE

QUESTION 4

Wavelength given *[SQRT[(1+(%GIVEN /100)) / (1-(% GIVEN/100))]]=answer

Answer is neg

PHYZ
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Question #2

Post  Guest001 on Sat Mar 28, 2009 2:12 pm

PHYZ...for some reason number two is not working for me..this is what i did...(1/(sqrt(1-(0.1234^2)))^-1= -0.9924...and its not working ..pls help???

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Re: 23.3 Maple TA

Post  Kathleen on Sat Mar 28, 2009 2:31 pm

It's not to the negative power, its the fraction and then minus 1.

So you should get 1/sqrt(.98477) = 1.0077 -1 = .0077 is your answer. and then negative of course

Kathleen

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question #2

Post  guest001 on Sat Mar 28, 2009 9:37 pm

thanks alot kathleen!!!

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Re: 23.3 Maple TA

Post  S on Wed Apr 01, 2009 11:16 am

I'm not able to get an answer for #4-- and I agree with your equation (according to the slides...) Is anyone else having this problem?

Thanks,

S
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Re: 23.3 Maple TA

Post  DJ on Wed Apr 01, 2009 5:55 pm

S wrote:I'm not able to get an answer for #4-- and I agree with your equation (according to the slides...) Is anyone else having this problem?

Thanks,

The provided equation is correct.

Are you:

1. Making sure to convert the percentage into decimal form? (i.e. 9.57% = .0957)
2. Watching your signs? (the fraction under the square root has 1+ as the numerator, and 1- as the denominator)

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Re: 23.3 Maple TA

Post  S on Thu Apr 02, 2009 11:06 pm

Thanks so much! Actually I made the stupid mistake of not converting my percents properly...

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Re: 23.3 Maple TA

Post  Money23 on Fri Apr 03, 2009 10:50 am

4) A galaxy receding from us with 11.484 % of the speed of light emits light at a wavelength of 525.9 nm. What is the wavelength we mesure in nm (sheet 35) ? Indicate with a negative (positive) sign whether the result changes (is the same) for the galaxy approaching us.
(525.9 E-9)* sqrt[ (1 + (11.484 / 100) / (1- (11.484/ 100)) =
525E-9 * sqrt (1.11484/ 0.88516) =
525E-9 * 1.122265= 5.8919E-7

I keep getting this answer and i think its right but it keeps coming out wrong. Can anyone help me with this one? I will greatly appreciate it!!! bounce

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Re: 23.3 Maple TA

Post  hax0r on Fri Apr 03, 2009 11:26 am

money,

4) A galaxy receding from us with 11.484 % of the speed of light emits light at a wavelength of 525.9 nm. What is the wavelength we mesure in nm (sheet 35) ? Indicate with a negative (positive) sign whether the result changes (is the same) for the galaxy approaching us.
(525.9 E-9)* sqrt[ (1 + (11.484 / 100) / (1- (11.484/ 100)) =
525E-9 * sqrt (1.11484/ 0.88516) =
525E-9 * 1.122265= 5.8919E-7

I keep getting this answer and i think its right but it keeps coming out wrong. Can anyone help me with this one? I will greatly appreciate it!!!

don't convert wavelength into SI, leave in nm. You're answer: -590.199

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Re: 23.3 Maple TA

Post  Money23 on Fri Apr 03, 2009 11:56 am

THANK YOU!!!

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