You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in table.

A bar graph: A display of information using bars of uniform width, their heights being proportional to the respective values. What is the information given by the bar graph?

Double Bar Graph : A bar graph showing two sets of data simultaneously. It useful for the comparison of the data. What is the information given by the double bar graph?

Proteins have primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?

In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?

Through which part of a neuron does information travel as an electrical impulse?

A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?

You are given a prism in which the two refracting surfaces are at 90^@ with each other. Draw ray diagrams using this prism so that the image of the object is rotated by 180^@ .

You are given a prism in which the two refracting surfaces are at 90^@ with each other. Draw ray diagrams using this prism so that the image of an object is rotated by 90^@

You are given a hammer,a battery,a bulb,wires and a switch. (a)How could you use them to distinguish between samples of metals and non-metals? (b)Assess the usefulness of these tests in distinguishing between metals and non-metals?