Grhhennhshsbvsgegeehehebevvevejskskjejejejehruurjrr
Given Information:
Current = I = 20 A
Diameter = d = 0.205 cm = 0.00205 m
Length of wire = L = 1 m
Required Information:
Energy produced = P = ?
Answer:
P = 2.03 J/s
Explanation:
We know that power required in a wire is
P = I²R
and R = ρL/A
Where ρ is the resistivity of the copper wire 1.68x10⁻⁸ Ω.m
L is the length of the wire and A is the area of the cross-section and is given by
A = πr²
A = π(d/2)²
A = π(0.00205/2)²
A = 3.3x10⁻⁶ m²
R = ρL/A
R = 1.68x10⁻⁸*(1)/3.3x10⁻⁶
R = 5.09x10⁻³ Ω
P = I²R
P = (20)²*5.09x10⁻³
P = 2.03 Watts or P = 2.03 J/s
Therefore, 2.03 J/s of energy is produced in 1.00 m of 12-gauge copper wire carrying a current of 20 A
To consider the molecule in gas at rest, suppose a container of gas at rest.
We know that velocity is a vector quantity and it includes direction but speed is a scalar quantity and it does not include a direction.
Although the molecules are moving around a lot, they are only moving around within the fixed walls of the container. As the container isn't moving (given), the net velocity of the gas molecules is zero. Think about their random movements as vectors, then think about adding up all those vectors over time. They cancel each other out over time. So, the average velocity of a molecule in gas at rest is zero.
But it's only the directions that cancel each other out, which is why the average speed (ignoring direction) is non-zero.
To learn more about average speed refer to the link:
brainly.com/question/12322912
#SPJ4
Note that 1 mL (milliliter) = 1 cm^3.
The volume of water is
Vw = 50.00 mL = 50 cm^3
From tables, the density of aluminum is 2.7 g/cm^3.
Because mass = density * volume, the volume of the aluminum is
Va = (15 g)/(2.7 g/cm^23) = 5.556 m^3
Because the aluminum sinks and displaces water in the cylinder, the new volume is the sum of the volume of water and the aluminum.
New volume = Vw + Va = 50 + 5.556 = 55.556 cm^3
Answer: 55.6 cm³ (nearest tenth)