yes
Electrons.
J.J Thomson
Electrons
apparatus
j.j. thomson
vicats apparatus is used for initial setting time of cement.
He discovered it 1897.
No, John Dalton did not discover electrons. The existence of electrons was proposed by J.J. Thomson in 1897 through his experiments on cathode rays. Dalton, on the other hand, is known for his work on atomic theory in the early 19th century.
Infra-red waves are used in night vision apparatus.
A SPATULA is a kind of laboratory apparatus used for stirring or mixing chemicals.. I hope You get this..
The gravitational constant denoted by letter G, is an empirical physical constant involved in the calculation(s) of gravitational force between two bodies
Cathodes(electrons) (-)