A ball has a diameter of 3.72 cm and average density of 0.0844 g/cm3. What force is required to hold it completely submerged under water

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Ответ:

Csmalls4412

27.07.2020

Physics

Magnetic field strength required for this is 0.25 T

Explanation:

As we know that the proton moves in circular path in uniform magnetic field

so the radius of the path of the circle is given as

$R = \frac{mv}{qB}$

here we know that

$q = 1.6 \times 10^{-19}C$

$m = 1.6 \times 10^{-27} kg$

R = 0.0200 m

$v = 5 \times 10^5 m/s$

now we have

$B = \frac{1.6 \times 10^{-27} (5 \times 10^5)}{(1.6 \times 10^{-19})(0.02)}$

so we have

B = 0.25 T

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