A simple machine consists of a small wheel with a groove around its outer edge.

Mineral(s) is / are used for A) fertilizers B) gemstones C) metal extract D) All of these

Inclined planes called ______ are provided in hospitals

Which coal is known as Hard coal?

Used for making and polishing ornaments.

Which of these process converts liquid to gaseous state? A) Condensation B) Evaporation C) Melting D) Freezing

Which of the following are compressible? (i) Steam (ii) Oxygen (iii) Nitrogen

A pair of tongs is an example of:

Gas insoluble in water

A stretched bow posses _____ energy

In second-class lever _______ comes in middle.

Galena is minerals for which metal

Matter changes from one state to another by