• # question_answer 17) Express the number appearing in the following statements in standard form: (a) The distance between Earth and Moon is $384,000,000m$ (b) Speed of light in vacuum is $300,000,000m/s$ (c) Diameter of the Earth is $1,27,56,000m$. (d) Diameter of the sun is $1,400,000,000m$ (e) In a galaxy here are on an average $100,000,000,000$stars. (f) The universe is estimated to be about $12,000,000,000$years old. (g)The distance of Sun from the centre of the Milky Way Galaxy is estimated to be $300,000,000,000,000,000,000m$ (h)$60,230,000,000,000,000,000,000$molecules are contained in a drop of water weighing $1.8gm.$ (i) The earth has $1,353,000,000$cubic km of sea water. (j) The population of India was about $1,027,000,000$in March, 2001.

(a) The mean distance between Earth and Moon is $3.84\times {{10}^{8}}m$.                 (b) Speed of light in vacuum is $3.0\times {{10}^{8}}m/s.$                 (c) Diameter of the Earth is $1.27556\times {{10}^{7}}m$                 (d)Diameter of the Sun is $1.4\times {{10}^{9}}m$                 (e) In galaxy there are on an average $1.0\times {{10}^{11}}$stars.                 (f) The universe is estimated to be about $1.2\times {{10}^{10}}$years old.                 (g) The distance of Sun from the centre of the Milky Way Galaxy is estimated to be $3.0\times {{10}^{20}}m$                 (h) $6.023\times {{10}^{22}}$molecules are contained in a drop of water weighing $1.8gm.$                 (i) The earth has $1.353\times {{10}^{9}}$cubic km of sea water. (j) The population of India was about $1.027\times {{10}^{9}}$in March, 2001.