A 30 m long copper wire with diameter of 8.9 mm and with 59 mA (miliAmps) of current running through it. If The resistivity of copper at room temperature is 1.68×10-8 Ω ⋅ m, calculate the voltage drop across the wire multiplied by 10^3. (Express the answer in two decimal places).

V = 0.48 [V]

Explanation:

We can calculate the area of the cable using the following expression:

Now we can calculate the total resistance using the following equation:

Using the ohm law we know that the voltage is equal to the product of the current by the resistance, in this way we can calculate the voltage.

V = I * R

V = 0.059 * 0.008102

V = 0.48*10^(-3) [volt] * (10^3)

V = 0.48 [V]

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.