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ad-work [718]
3 years ago
5

The accepted length of a steel pipe is 6.7 m. Calculate the percent error of each of these measurements.

Chemistry
1 answer:
disa [49]3 years ago
4 0

Answer:

a. 1.49%

b. -8.95%

c. 0%

d. -1.49%

Explanation:

a. Actual length = 6.7 m

Measured length = 6.8 m

% error = (Measured length - Actual Length)/Actual Length * 100

= (6.8-6.7)/6.7 * 100 = 0.1/6.7 * 100 = 1.49%

b. Actual length = 6.7 m

Measured length = 6.1 m

% error = (Measured length - Actual Length)/Actual Length * 100

= (6.1-6.7)/6.7 * 100 = -0.6/6.7 * 100 = -8.95%

c. Actual length = 6.7 m

Measured length = 6.7 m

% error = (Measured length - Actual Length)/Actual Length * 100

= (6.7-6.7)/6.7 * 100 = 0.1/6.7 * 100 = 0%

a. Actual length = 6.7 m

Measured length = 6.6 m

% error = (Measured length - Actual Length)/Actual Length * 100

= (6.6-6.7)/6.7 * 100 = -0.1/6.7 * 100 = -1.49%

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the red line observed in the line spectrum for hydrogen has 3.03x10^-19J, what is the wavelength, in nm, of this?
djverab [1.8K]

Answer:

λ = 6.5604 x 1016 nm

Explanation:

Given Data:

The energy of the red line in Hydrogen Spectra = 3.03 x 10-19

Formula to calculate Wave length

E= hv

Where E is Energy

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In turn

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Formula to be Used:

E= hv………………………… (1)

Putting the value v in equation 1

               E= h c/ λ…………………… (2)

Put the value in equation 2

3.03 x 10-19 J  = (6.626 x 10–34 J s) x (3.00 x 108 m s–1) / λ ……………………….(3)

By rearranging equation 3

λ = (6.626 x 10–34 J s) x (3.00 x 108 m s–1) /3.03 x 10-19  J

λ = 6.5604 x 107 m

The answer is in “m”

So we have to convert it into nm

So for this to convert “m” to “nm” multiply the answer with 109

λ = 6.5604 x 107 x 109

λ = 6.5604 x 1016 nm

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