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nadezda [96]
3 years ago
6

"uses for simple machines" whats a piano that needs to be moved up to a third floor apartment

Chemistry
1 answer:
STALIN [3.7K]3 years ago
5 0

Answer:

Pulley

Explanation:

You can't the piano up the stairs, you need to something to bring it up

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Iron filings were mixed together with salt crystals. What unique property of iron would be BEST to separate the filings from the
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Iron has magnetic properties, so you would just need to hold a magnet over the mixture and the filings will come right out.
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3 years ago
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The chemistry lab is 0.3394km from the nurses office. How many feet is the distance?
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Match the salt with the acid and base used to form it in a neutralizing reaction.
nignag [31]
<h3><u>Answer;</u></h3>

K2SO4 - KOH and H2SO4

NaBr - NaOH and HBr

<h3><u>Explanation;</u></h3>
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  • Salts may be produced when acids and bases are combined together in equal proportions, a process called neutralization.
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4 0
3 years ago
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It is observed that the atoms of hydrogen in gas discharge tube emit radiations whose spectrum shows line characteristics (line
azamat

Answer: the line Spectra of hydrogen lies between the ultra-violet, visible light and infra-red of the electro magnetic spectrum

Explanation:

Electromagnetic radiation spans an wide range of wavelengths and frequencies. This range is called the electromagnetic spectrum. The electromagnetic spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The 7 regions includes; radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.

lower-energy radiation, such as radio waves, is expressed as frequency while microwaves, infrared, visible and UV light are usually expressed as wavelength and finally, higher-energy radiation such as X-rays and gamma rays, is expressed in terms of energy per photon.

Therefore, hydrogen lies between the ultra-violet, visible light and infra-red region of the electro magnetic spectrum.

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3 years ago
What is the time required for contamination source
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I hope my answer helped :)
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