Improvement in Food Resources — Science STD 9 — Question

The term ‘cell’ was given by:

1. Leeuwenhoek
2. Robert Hooke
3. Flemming
4. Robert Brown

An iron sphere of mass 10kg has the same diameter as an aluminium sphere of mass 3.5kg. Both the spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same:

The relative densities of four liquids P, Q, R and S are 1.26, 1.0, 0.84 and 13.6 respectively. An object is floated in all these liquids, one by one. In which liquid the object will float with its maximum volume submerged under the liquid?

1. P
2. Q
3. R
4. S