Answer:
The resistance will be 2×R
Explanation:
We note that the resistivity of a cylindrical wire is given by the following relation;
Where:
ρ = Resistivity of the wire
R = The wire resistance
A = Cross sectional area of the wire = π·D²/4
L = Length of the wire
Rearranging, we have;
If the length and the diameter are both cut in half, we have;
L₂ = L/2
A₂ =π·D₂²/4 =
Therefore, the new resistance, R₂ can be expressed as follows;
Hence, the new resistance R₂ = 2×R, that is the resistance will be doubled.
Answer : The charge flows through a wire in 1 hour is,
Explanation :
Formula used :
where,
I = current = 15 A
q = charge = ?
t = time = 1 hour = 3600 s
Now put all the given value of in the above formula, we get:
Therefore, the charge flows through a wire in 1 hour is,
Well, I'm not sure right now that it actually does.
But if it does, that's because the sun is about 400 times
FARTHER from the Earth than the moon is.
Answer:
Select the answer that states:
<em>VX = constant, and ay = -g</em>
Explanation:
In the case of an object undergoing projectile motion, such motion is divided in two analysis. The vertical analysis uses kinematic equations associated with an accelerated motion under the constant acceleration of gravity, and the horizontal analysis is that of a uniform motion at constant velocity.
Therefore the projectile motion uses the velocity in the horizontal (x-direction) as constant. and the vertical motion (associated with the y-axis) a motion with acceleration equal to "g".
Then, the corect answer is the one that states:
"<em>VX = constant, and ay = -g</em>"
Answer:
a force and a movement in the same direction as the force.
Explanation: