Comuter science CH25 Computer - An Introduction — Science STD 9 — Question

Define aquaregia.

Define an electric generator or a dynamo.

Relate the names of the following scientists with the statements given below. (Mendeleev, Newlands, Dobereiner). a) Arranged elements into groups containing three elements each. b) Arranged elements in a group of seven with increasing atomic masses and eighth elements with similar properties kept below the first like eight note in an act of music. c) Arranged elements in the increasing order of atomic mass

Name of the following: (a) An element which obtains the noble gas configuration of neon by losing three electrons. (b) An element which gains two electrons to obtain the noble gas configuration of Neon.

If cell (A) has undergone one mitotic division and another cell (B) has completed its meiotic division. The number of cells produced in A and B would beCell A: Cell B :

What is meant by uniform circular motion? Give two examples of uniform circular motion.

Define Fleming’s Right Hand Rule.

State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.

List out the characteristics of Dye.

Define absolute zero.