Independent variable: the interdependent variable in this example, could be a number of things but the main one is what type of brand is the gum and what kind is it.
Dependent variable: the dependent variable is what you are trying to find so in this case, you are trying to find does gum affect a student's performance.This is the Dependent variable.
Hope I helped!
Have a nice day,
scollier1607
The mass of an object affects how powerful the attractive force is. To feel the pull / gravitation the mass of the object would have to be huge, bigger than that of massive buildings
Solution :
Magnetic field at the centre due to 
:
Its direction will be downwards in the plane of the paper.
Magnetic field at the centre due to 
:
Its direction will be upwards in the plane of the paper
Magnetic field due to the coil:
Its direction will be rightwards.
Now the resultant of the magnetic field at the centre.
Now the direction ,
Therefore 
(from right to upward)
The amount of work done on the weights would be approximately 15.0 Kg of work
