You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured of a weighing machine. In reality, one is heavier than the other. Can you say which one is heavier and why?

If one of the particles is heavier than mass other, to which side will their centre of mass shift?

If in two right triangles, one of the acute angles of one triangle is equal to an acute angle of the other triangle. Can you say that two triangles will be similar? Why?

The following question is followed by two statements named I and II. You have to decide, if these statements are sufficient to answer the asked questions and mark the correct option. Who among P, Q, R, S and T each one having different weight is the third heaviest? I. Q is heavier than R and S. T is heavier only than P. II. Only three are lighter than R. The weight of Q is 50kg which is 2kg more than R. S is heavier only than P and T.

You charge a parallel capacitor, remove it from the battery and prevent the wires connected to the plates from touching each other. When you pull the plates further apart, which one of the following quantities increases?