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Dmitriy789 [7]
3 years ago
10

How does the magnetic field surrounding earth benefit humankind

Chemistry
2 answers:
skad [1K]3 years ago
8 0

The magnetic field surrounding earth benefits humankind by providing a protective sheet around earth.

it prevents the entry of harmful rays, radioactive particles, to reach earth

It prevents the harmful rays and particles thus also shields the ozone layer which is the protective layer of our earth crust.

Correct answer:

C it protects us from radioactive particles

Xelga [282]3 years ago
5 0
C, it prevents the Earth from ultraviolet radiation and other harmful substances from space
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Determine how many ml of water you need to remove, by evaporation, if you have a 500 ml of 10.20 M HNO3 dilute solution and you
Ludmilka [50]

The total volume of water that would be removed will be 75 mL

<h3>Dilution equation</h3>

Using the dilution equation:

M1V1 = M2V2

In this case, M1 = 500 mL, V1 = 10.20 M, M2 = 12 M

Substitute:

V2 = 500 x 10.20/12

         = 425 mL

The final volume in order to arrive at 12 M HNO3 would be 425 mL from the initial 500 mL. Thus, the total amount of water that will be removed by evaporation can be calculated as:

500 - 425 = 75 mL

More on dilution can be found here: brainly.com/question/7208939

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Explanation:

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3 years ago
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PLS ASAP!! Which has a wavelength of 350 nanometers?
slava [35]

Answer:

Ultraviolet light.

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8 0
4 years ago
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The internal energy of 10 moles of helium (a monatomic gas) is 15 kJ. What is the rms speed of the molecules? (The molar mass of
Radda [10]

Answer:

v_{rms}=866.32m/s

Explanation:

Hello,

In this case, since the rms speed of the molecules is computed by:

v_{rms}=\sqrt{\frac{3RT}{M} }

Whereas the absolute temperature is computed from the internal energy (by using the Cp of helium (3.1156 J/g*K) as shown below:

U=nCvT\\\\T=\frac{U}{nCv}=\frac{15kJ*\frac{1000J}{1kJ} }{10mol*\frac{4.00g}{1mol} *3.1156\frac{J}{g*K} }  \\\\T=120.36K

Thereby, the rms speed results:

v_{rms}=\sqrt{\frac{3*8.314\frac{kg*m^2}{s^2*mol*K}*120.36K}{4.00\frac{g}{mol}*\frac{1kg}{1000} } } \\\\v_{rms}=866.32m/s

Regards.

6 0
3 years ago
Explain how matter is not created or destroyed when there are chemical and physical changes.
andrezito [222]
When 2 different kinds of matter make contact, if they react to each other, they simply exchange atoms, not making any new matter in the process, they simply gets turned into something different.
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3 years ago
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