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disa [49]
3 years ago
14

Peter went swimming at a lake with his friends. They arrived early in the morning. Peter walked on the sand around the lake with

his bare feet. The sand is cool. At noon, when Peter walked around the lake with his bare feet, the sand is very hot. What has made the sand hot at noon?
Physics
1 answer:
lapo4ka [179]3 years ago
4 0
The sun was shining on the sand heating it up causing ot to become hot
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7 0
3 years ago
A nucleus with a mass number of 64 has a mean radius of about: _________.
dangina [55]

Answer:

The correct option is A

Explanation:

From the question we are told that

The mass number is A= 64

Generally the mean radius is mathematically evaluated as

R  =  R_o A^{\frac{1}{3} }

Here R_o is a constant with a value  R_o =1.2*10^{-15}

So  

     R  =  1.2*10^{-15} *  64^{\frac{1}{3} }

      R  =   4.8 *10^{-15}

        R  =   4.8\ fm

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2 years ago
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3 years ago
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2 years ago
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3 years ago
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