Who invented the contact lens?
Blood pressure is measured by _______.
Which type of frictional force is exerted between two surfaces in relative motion?
The first picture of a pinhole camera obscura is a drawn by?
__________ is the mechanical transfer of energy to a system or from a system by an external force on it.
A p-type and n-type semiconductor can be obtained by doping pure silicon with ______.
The unit of which physical quantity is not pascal?
Which physical quantity is measured in 'siemens'?
The behavior of water around 4˙C Temperature is called as ______ expansion.
In a projectile motion, the horizontal range achieved is same whether the body is projected at theta and ___________.
Who invented Helicopter?
Venn diagram was invented by
Cadmium pollution is associated with which of the following?
The device used for the detection and measurement of all types of radiations (alpha, beta and gamma) is:
Which law of thermodynamics states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another?
How much energy is required by each coulomb of charge passing through a 10 V battery?
The poisonous gas accidentally released in Bhopal Gas Tragedy is
For what is Radiocarbon dating technique used?
Which among the following is not a characteristic of oxidation reaction?
Automobile exhaust leads to a poisonous pollutant