3 years ago

Which element will react with cold water? (a) sodium (b)calcium (c)zinc (d)iron (e)copper (g)mercury

Chemistry

1 answer:

rjkz [21]3 years ago

3 0

The answer is a) sodium!

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Answer : Option C) 2.5 units

Explanation : For calculating the strength of a unknown magnetic field in comparison with the given magnetic field we can use the magnetic formula as;

$\frac{ S_{1}}{S_{2}} = \frac{ (D_{1}^{2}) }{(D_{2}^{2})} .$

On substituting the values we get;

$\frac{10}{x} = \frac{4^{2}}{2^{2}}$ ;

On solving we get the magnetic B field strength as 2.5 units

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