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Verizon [17]
3 years ago
15

Which particles can be stopped by human skin? ) alpha and beta particles only alpha particles alpha and gamma particles beta and

gamma particles
Chemistry
2 answers:
Helga [31]3 years ago
7 0
Alpha and Beta particles can be stopped by our skin. Gamma particles cannot be stopped by our skin.
wlad13 [49]3 years ago
4 0

Answer : The correct option is, only alpha particles.

Explanation :

Penetration power : It is defined as the movement of the rays or the particles through the object.  As more the energy of a particle, the more will be the penetrating power.

The ascending or increasing order of the penetration power of the particles will be :

Alpha rays < Beta rays < Gamma rays

The penetrating power of the particles alpha, beta and gamma rays varies differently.

  • The alpha particles can be stopped by the paper, cloth, human skin.
  • The beta particles can pass through the paper, cloth, human skin but it can not pass through the aluminum foil.
  • The blocking of gamma rays is very difficult. It can be stopped only by concrete, lead, or other heavy shielding.

Hence, the particles can be stopped by human skin is only alpha particles.

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Read 2 more answers
An irregular chunk of iron has a density of 7.87 g/cm3. A 14.5 gram chunk is added to a graduated cylinder. If the final volume
bulgar [2K]

Answer:

37.96 mL

Explanation:

From the question given above, the following data were obtained:

Density (D) of iron = 7.87 g/cm³

Mass (m) of iron = 14.5 g

Volume of Cylinder + Iron = 39.8 mL

Volume of Cylinder =?

Next, we shall determine the volume of the chunk of iron. This can be obtained as follow:

Density (D) of iron = 7.87 g/cm³

Mass (m) of iron = 14.5 g

Volume (V) of iron =?

D = m/V

7.87 = 14.5 /V

Cross multiply

7.87 × V = 14.5

Divide both side by 7.87

V = 14.5 / 7.87

V = 1.84 cm³

Recall:

1 cm³ = 1 mL

Therefore,

1.84 cm³ = 1.84 mL

Therefore, the volume of the chunk of iron is 1.84 mL.

Finally, we shall determine the starting volume of the cylinder as follow:

Volume of Cylinder + Iron = 39.8 mL

Volume of Iron = 1.84 mL.

Volume of Cylinder =?

Volume of Cylinder = (Volume of Cylinder + Iron) – Volume of Iron

Volume of Cylinder = 39.8 – 1.84

Volume of Cylinder = 37.96 mL

Therefore the starting volume of cylinder is 37.96 mL

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3 years ago
What evidence is there that energy is conserved?
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The law of conservation 

Hope this helps

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