The Fundamental Unit of Life — Science STD 9 — Question

Uniform circular motion is called continuously accelerated motion mainly because its:

The commercial unit of energy is:

1. Watt.
2. Watt-hour.
3. Kilowatt-hour.
4. Kilowatt.

A lighting flash was seen on the sky 10s before the thunder sound. How far was the cloud? (Speed of sound = 340ms)

When a fire man directs a powerful stream of water on a fire from a hose pipe, the hose pipe tends to go backward. This is an example of Newton's:

Potential energy is directly proportional to:

A man is standing on a platform of a balance and takes a quick step, then his weight:

Which of the following instruments produces sounds by the vibrations of the air column in them?

Nasal and genital tracts are lined by:

Which is not a function of epidermis?

Why does a ship made of steel float on water while an oil-pin of steel sinks down?