In a galaxy there are on average $100000000000$ stars. Express it in standard form.

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Solution

The standard form of any number is written by placing decimal after 1 digit from the left-hand side.
For example - $123654$ in standard form will be $= 1.23654 \times 10^{5}$ .
The number of stars in galaxy on average = $100000000000$
= $10^{11}$
Hence, The number of stars in galaxy on average are $10^{11} .$ .

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Q. Express each of the following numbers in standard form:

(i) Diameter of Earth = 12756000 m.
(ii) Distance between Earth and Moon = 384000000 m.
(iii) Population of India in March 2001 = 1027000000.
(iv) Number of stars in a galaxy = 100000000000.
(v) The present age of universe = 12000000000 years

Express the number appearing in the following statements in standard form.

(a) The distance between Earth and Moon is 384, 000, 000 m.

(b) Speed of light in vacuum is 300, 000, 000 m/s.

(d) Diameter of the Sun is 1, 400, 000, 000 m.

(e) In a galaxy there 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 the Sun from the centre of the Milky Way Galaxy is estimated to be 300, 000, 000, 000, 000, 000, 000 m.

(h) 60, 230, 000, 000, 000, 000, 000, 000 molecules are contained in a drop of water weighing 1.8 gm.

(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.

Express the number appearing in the following statement in standard form:

In a galaxy there are on an average $100, 000, 000, 000$ stars.

Question 4(e)
Express the number appearing in the following statements in standard form:
(e) In a galaxy there are on an average 100,000,000,000 stars.

There are over 100 billion stars in our galaxy, the MIlky Way. Scientists estimate there are about 100 billion galaxies in the universe. Recall that 1 billion = 10⁹. If every galaxy has about 100 billion stars, about how many stars are in the universe?

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In a galaxy there are on average 100000000000stars. Express it in standard form.

The standard form of any number is written by placing decimal after 1 digit from the left-hand side.For example - 123654 in standard form will be=1.23654×105.The number of stars in galaxy on average = 100000000000 = 1011 Hence, The number of stars in galaxy on average are 1011..

In a galaxy there are on average $100000000000$ stars. Express it in standard form.