Can you recall, what centrifugal force is, and think why a molecule with higher mass/density would sediment faster?

If you compare the gravitational force on the earth due to the sun to that due to the moon, you would find that the sun's pull is greater than moon's pull. However , the tidal effect of the moon's pull is greater than the tidal effect of the sun. Why?

How can you determine the atoic mass of an unknown metal if you know its density and the dimension of its unit cell ? Explain.

How can you determine the atoic mass of an unknown metal if you know its density and the dimension of its unit cell ? Explain.

Two charged conducting spheres of radii a and b are connected to each other by a wire. What is the ratio of electric fields at the surface of two spheres ? Use the result obtained to explain why charge density on the sharp and pointed ends of a conductor is higher than on its fatter portions ?

Explain how can you determine the no. of atoms per unit cell of an unknown metal if you know its atomic mass , mass density and the dimensions of unit cell of its crystal.

(a) Why alkaline earth metals are harder, have higer melting ponts and higher densities than the alkali metals? (b). Why the atoms of alkaline earth metals are smaller than the corresponding alkali metals? (c ). Why alkaline earth metals have high electrical and thermal conductivities? (d). What is black ash? (e). Why the variation in physical properties of alkaline earth elements is not as regular as in the case of alkali metals?

An iron bar falling vertically through the hollow region of a thick cylindrical shell made of copper experiences a retarding force and attains a terminal velocity. What can you conclude about the iron bar?

Gravitational force acts on all objects in properties to their masses. Why then, a heavy object does not fall faster than a light object?

You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster ?

Remember, glucose or galactose cannot act as inducers for lac operon. Can you think, of how long the lac operon would be expressed in the presence of lactose?