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3 years ago

Which change of state is the reverse of deposition

Physics

1 answer:

STALIN [3.7K]3 years ago

3 0

Answer:

B. Sublimation

Explanation:

Normally, when a gas or vapor, like water vapor, is cooled, it turns into a liquid (condensation).

Example: Water vapor would turn into liquid water.

If that liquid is cooled further, it turns into a solid (freezing).

Example: Liquid water would turn into ice.

<em>However</em>, Deposition is the process in which a gas changes into a solid phase without ever turning into liquid.

Sublimation is the reverse process in which a solid changes into a gas phase without turning into a liquid.

Tip: Think of how "dry ice" phases from solid to gas. It's dry because there is no liquid phase.

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Complete question:

Two parallel 3.0-meter long wires conduct current. The current in the top wire is 12.5 A and flows to the right. The top wire feels a repulsive force of 2.4 x 10^-4 N created by the interaction of the 12.5 A current and the magnetic field created by the bottom current (I). Find the magnitude and direction of the bottom current, if the distance between the two wires is 40cm.

Answer:

The bottom current is 12.8 A to the right.

Explanation:

Given;

length of the wires, L = 3.0 m

current in the top wire, I₁ = 12.5 A

repulsive force between the two wires, F = 2.4 x 10⁻⁴ N

distance between the two wires, r = 40 cm = 0.4 m

The repulsive force between the two wires is given by;

$F = \frac{\mu_oI_1I_2L}{2\pi r}\\\\I_{2} = \frac{2F\pi r}{\mu_oI_1L}$

Where;

I₂ is the bottom current

The direction of the bottom current must be in the same direction as the top current since the force between the two wires is repulsive.

$I_{2} = \frac{2F\pi r}{\mu_oI_1L}\\\\I_{2} = \frac{2(2.4*10^{-4})(\pi)(0.4)}{(4\pi*10^{-7})(12.5)(3)}\\\\I_{2} = 12.8 \ A$

Therefore, the bottom current is 12.8 A to the right.

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