Please help on this one?

Physics

2 answers:

andreyandreev [35.5K]2 years ago

5 0

The answer is Calcium because it has a positive charge of 2. This makes it an atom of a chemical element that has an unequal number of electrons compared to protons. A neon is unlikely to become an anion by accepting another electron. Oxygen is a negative ion. A chlorine atom will become a charged ion with a negative charge of (-1).

Zarrin [17]2 years ago

4 0

The answer might be option C, not sure.

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To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 7.1 cm in diameter and 57 cm in length. You wou

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We need about 8769 meters of wire to produce a 2.6 kilogauss magnetic field.

Explanation:

Recall the formula for the magnetic field produced by a solenoid of length L. N turns, and running a current I:

$B=\mu_0\,\frac{N}{L} \,I$

So, in our case, where B = 2.6 KG = 0.26 Tesla; I is 3 amperes, and L = 0.57 m, we can find what is the number of turns needed;

$B=\mu_0\,\frac{N}{L} \,I\\0.26=4\,\pi\,10^{-7}\frac{N}{0.57} \,3\\N=\frac{0.26*0.57\,10^7}{12\,\pi} \\N=39311.27$

Therefore we need about 39312 turns of wire. Considering that each turn must have a length of $\pi\,D$ , where D is the diameter of the plastic cylindrical tube, then the total length of the wire must be: