True or false the higher the altitude, the greater the air pressure?

Identify the following atom

bezimeni [28]

Answer:

Explanation:

First count the protons. I think there are 10 of them. That pretty much locks it in. The atom must be Neon.

All the electrons are in the first 2 rings and there are 10 all together.

Neon

8 0

2 years ago

Photovoltaic cells convert solar energy into electricity. Calculate the wavelength of light (in nm) required for mercury (Φ =7.2

Sholpan [36]

Answer:

275.3 nm is the wavelength of light required for mercury.

Mercury can not be used to generate electricity from the sun because wavelength at which mercury will emit an electron is smaller than 500 nm.

Explanation:

The wavelength of light required for mercury to emit an electron.

The wavelength of the radiation = $\lambda$

Energy required fro mercury to to emit an electron = E

Energy required fro mercury to to emit an electron will the energy if the radiation = E' = $7.22\times 10^{-19} J$

E' = E

To calculate the wavelength of light, we use the equation:

$E=\frac{hc}{\lambda }$

where,

$\lambda$ = wavelength of the light

h = Planck's constant = $6.626\times 10^{-34} Js$

c = speed of light = $3\times 10^8m/s$

$\lambda =\frac{hc}{E}$

$=\frac{6.626\times 10^{-34} Js\times 3\times 10^8m/s}{7.22\times 10^{-19} J}$

$\lambda =2.753\times 10^{-7} m=2.753\times 10^{-7}\times 10^ nm =275.3 nm$

Wavelength of the sun light in the visible region = 500 nm

500 nm > 275.3 nm

$E\propto \frac{1}{\lambda }$

Less energy < more energy

So, this means that mercury can not be used to generate electricity from the sun.

6 0

3 years ago

If the potato solution was boiled for 10 minutes and cooled for 10 minutes before being tested, the average time for the disks t

posledela

Answer: The correct answer is : D) more than 30 seconds

Explanation: This experiment is carried out in order to study the actions of the catalase enzyme on hydrogen peroxide. Catalase is extracted from potatoes and stored on ice. 1%, 5%, 10% and 15% hydrogen peroxide solutions are prepared. Filter papers are soaked with the catalase and then placed inside each hydrogen peroxide solution. Then the time it takes for the filter paper discs to float from the bubbles that are produced is measured.

5 0

2 years ago

Which of the following measures the radiation given off by atoms per second?

marin [14]

curie, <span>one basic unit are used for measuring radiation. One is the </span>curie,<span> named after Marie and Pierre Curie. </span>

6 0

2 years ago

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Balance the chemical equation. Based on the equation, how many grams of chlorine are produced when the sodium chloride decompose

aliina [53]

Answer:

Answer is in the photo

Explanation:

Have a nice day and if the photo isn’t visible let me know! :)

5 0

2 years ago

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