An observer takes 10 observations in an experiment .I he repeats the same experiment by taking 20 observations by what factor error will be reduced ?

What were the observations and conclusions drawn from a-scattering experiment ?

What were the observations and important calculations drawn from a-scattering experiment ?

What are observations of Rutherford’s scattering experiment?

In Davisson and Germer experiment states the observations which led to show the wave nature of electrons?

Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. write the chemical equations for both the reactions.

The mean and standard deviation of 20 observations are found to be 10 and 2. respectively. On rechecking, it was found that an observation 8 was incorrect. Calculate the correct mean and standard deviation in each of the following cases: (i) If wrong item is omitted. (ii) If it is replaced by 12.