Questions

$$\begin{gathered} ∆ABC is similar to ∆PQR. If ratio of perimeters of ∆ABC and ∆PQR is 1:2 and \\ if PQ = 10 cm then what is the length of AB (in cm)? \end{gathered}$$

Who invented Vacuum Flask?

Fundamental duties are mentioned in which of the following part of Indian Constitution?

Rate of work done is _______.

If the resistance of a conductor is reduced to half its initial value, then the heating effect in the conductor will become ___.

In networks, a small message used to pass between one station to another is known as ____________

The boundary between Earth's crust and mantle is _____.

During the past century, the temperature of Earth has increased by ________.