A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. The magnetic field at any point is specified by two values, the direction and the magnitude; such that it is a vector field. Mathematically it is described as,

Here
= Permeability at free space constant
= Current at each object
d = Distance to the center point of the two object
Two magnetic field due to the current in the same directions then is,

Replacing,



Therefore the correct answer is E.
Answer:
Because moisture and warmth are crucial to thunderstorms
To solve this problem it is necessary to apply the equations related to the description of the tangential and angular movement.
The displacement where the speed and acceleration is related is given by the equation:

Where
Initial velocity (0 because start from rest)
t = time
a = Acceleration
We have angular acceleration but not tangential acceleration. Tangential acceleration can be obtained through the relationship



And we have also that the displacement is

Now replacing,




Therefore will take the cord to unwind around 10s
Answer:
In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. ... For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes.
Explanation: