Questions

ECHO.

While dew , fog and mist are formed due to condensation of vapour into water drops, hail falls from the clouds in the form of hard pellets of ice.

When you give your item to the USPS for delivery, it accepts your item and starts the process of delivery. Transit is a part of the shipment delivery process. When we say that the package is in the transit or in transit to the destination, it means that the package is on the way to the delivery.

Pitot tube is used to measure stagnation pressure.

Charles Babbage, the father of computer, invented the first general-purpose computer in an effort to prevent the mathematical errors that were prevalent in the human-calculated mathematics of his time.

A Mirage is a naturally occurring optical phenomenon due to unequal heating of different parts of the atmosphere in which light rays bend to produce a displaced image of distant objects or the sky.

Molecular compounds are those with covalent bonds between the elements and those elements are typically non metals.

Here in the given options, Ar is an element. NaI has an ionic bond. Hence, N2O4 has a covalent bond between the two non metals and is a molecular compound.