Hello!
The number of 20-g ice cubes required to absorb 47 kJ from a glass of water upon melting is 7 icecubes
Why?
We are going to clear from the equation of the released heat, the mass of ice (m). The specific latent heat of fusion of ice is 336 kJ/kg:

So, 7 ice cubes are required to absorb that amount of heat from the glass of water.
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It’s either the first or second one
I think it’s the first one - the outer cells of the blastocyst
Answer:
the ability to breed successfully
Explanation:
'cause alphe-particle which was +ve charge, get repulsion from the atom, so he deducted that.......