How many different types of gametes will be produced by a plant with the genotype $AABbCC$?

Which of the following transitions in a hydrogen atom emits a photon of the highest frequency?

The area bounded by the curves $y = x(x - 3)^2$ and $y = x$ is (in sq. units) :

Which relation is incorrect?

Degenerate electron pressure will not be sufficient to prevent core collapse of a white dwarf if its mass becomes $n$ times the solar mass. The value of $n$ is:

$A$ bullet of mass $0.02 \ kg$ travelling horizontally with velocity $250 \ ms^{-1}$ strikes a block of wood of mass $0.23 \ kg$ which rests on a rough horizontal surface. After the impact,the block and bullet move together and come to rest after travelling a distance of $40 \ m$. Find the coefficient of sliding friction of the rough surface. (Take $g = 9.8 \ ms^{-2}$)