Answer:
D. There is a magnetic force pushing the wires away from one another.
Explanation:
When electric current flows through one wire then it will induce magnetic field now this magnetic field will exert the force on another current carrying wire
Now we know that force between two current carrying wires is given as
so here if two wire have current in same direction then two wires will attract each other
Also when current in wire is anti parallel to each other then the force between two wires is repulsive force
so correct answer will be
D. There is a magnetic force pushing the wires away from one another.
The answer is B. Just had it on usatestprep
Answer:
Two factors effecting the magnitude of the force of gravity between 2 objects are the product of their masses and square of distance between them.
Explanation:
According to Newton's law of universal gravitation
where F is the gravitational force, G is the universal gravitational constant and its value is 6.6743 × 10⁻¹¹ Nm²/kg₂ , m₁ and m₂ are masses of bodies and r is the distance between them.
It can be seen from the above equation that F is directly proportional to the product of the masses and inversely proportional to the square of distance between them.
F ∝ m₁m₂
F ∝ 1/r²
As far as the masses of the bodies increase, magnitude of the Gravitational force increases and if distance between them increase then Gravitational force between them decreases.
If it is a mixture like iron shredding and sand, you can use a magnet to separate the mixture.