Which one of the following is Greenhouse Gas ?

In the formula "W = Fs cos $\theta$", the angle between force and displacement ($\theta$) is equal to 90$\degree$, the net work done will be:

Consider the following option arranged according to classification.....

(A) Order

(B) Family

(C) Species

(D) Genus

Choose the correct answer from the options given below:

Palaeozoology is a :

Who is the CEO of Facebook?

When, some drops of nail polish remover fall on your palm, the cooling sensation is a result of which of the following phenomenon:

Aryabhatta, India's first satellite, was launched from which of the following launching stations?