3 years ago

What does the principle of conservation of matter say

Physics

1 answer:

Vikentia [17]3 years ago

8 0

Answer:

it says that matter cannot be created or destroyed so the number of atoms is the same after chemical reactions

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In the photoelectric effect, a photon with an energy of 5.3 × 10–19 J strikes an electron in a metal. Of this energy, 3.6 × 10–1

valentina_108 [34]

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The velocity of the photo electron is $6.11\times 10^5\ m/s$ .

Explanation:

Given that,

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$5.3\times 10^{-19}\ J=3.6\times 10^{-19}\ J+K\\\\K=5.3\times 10^{-19}-3.6\times 10^{-19}\\\\K=1.7\times 10^{-19}\ J$

The formula of kinetic energy is given by :

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