All digits shown on the measuring device, plus one estimated digit are considered___

If you were trying to build a sound proof room, which of the following materials would you choose in order to absorb the most so

LuckyWell [14K]

The sound absorption for wood is greater than the sound absorption coeffiecient for concrete at most frequencies, hence based on the coefficient of absorption for each material, wood is the best choice.

7 0

3 years ago

The distance measured from trough to trough or crest to crest of a wave is called the

ikadub [295]

Its called a wavelength

7 0

3 years ago

Read 2 more answers

When a low-pressure gas of hydrogen atoms is placed in a tube and a large voltage is applied to the end of the tube, the atoms w

FromTheMoon [43]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The value of n is $n =7$

Explanation:

From the question we are told that

The value of m = 2

For every value of $m, n = m+ 1, m+2,m+3,....$

The modified version of Balmer's formula is $\frac{1}{\lambda} = R [\frac{1}{m^2} - \frac{1}{n^2} ]$

The Rydberg constant has a value of $R = 1.097 *10^{7} m^{-1}$

The objective of this solution is to obtain the value of n for which the wavelength of the Balmer series line is smaller than 400nm

For m = 2 and n =3

The wavelength is

$\frac{1}{\lambda } = (1.097 * 10^7)[\frac{1}{2^2} - \frac{1}{3^2} ]$

$\lambda = \frac{1}{1523611.1112}$

$\lambda = 656nm$

For m = 2 and n = 4

The wavelength is

$\frac{1}{\lambda } = (1.097 * 10^7)[\frac{1}{2^2} - \frac{1}{4^2} ]$

$\lambda = \frac{1}{2056875}$

$\lambda = 486nm$

For m = 2 and n = 5

The wavelength is

$\frac{1}{\lambda } = (1.097 * 10^7)[\frac{1}{2^2} - \frac{1}{5^2} ]$

$\lambda = \frac{1}{2303700}$

$\lambda = 434nm$

For m = 2 and n = 6

The wavelength is

$\frac{1}{\lambda } = (1.097 * 10^7)[\frac{1}{2^2} - \frac{1}{6^2} ]$

$\lambda = \frac{1}{2422222}$

$\lambda = 410nm$

For m = 2 and n = 7

The wavelength is

$\frac{1}{\lambda } = (1.097 * 10^7)[\frac{1}{2^2} - \frac{1}{7^2} ]$

$\lambda = \frac{1}{2518622}$

$\lambda = 397nm$

So the value of n is 7

7 0

3 years ago

Jack and jill exercise in a 25.0-m-long swimming pool. jack swims nine lengths of the pool in 2 minutes and 19.5 seconds, while

Archy [21]

First of all, the average speed and average velocity would just have the same magnitude, so they are equal. Now, the average speed or average velocity is the total distance traveled divided by the elapsed time. For consistency of units, let's convert the time to seconds.

Time for Jack or Jill = 2 min(60s/1min) + 19.5 s = 139.5 seconds

Then, the average speed for each would be:
Average speed of Jack = 9(25 m)/139.5 s = 1.613 m/s
Average speed of Jill = 10(25 m)/139.5 s = 1.792 m/s

7 0

3 years ago

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Which of the following Earth spheres do climate zones affect? atmosphere biosphere geosphere all of the above

grin007 [14]

The atmosphere consists of five layers and is responsible for Earth's weather. Even though it seems like air is made of nothing, it consists of particles too small to be seen. All these particles have weight that push down on Earth. The weight of air above us is called air pressure.

3 0

3 years ago

All digits shown on the measuring device, plus one estimated digit are considered____