Sunday

December 21, 2014

December 21, 2014

Posted by **David** on Monday, June 19, 2006 at 12:35pm.

a) The sun has a diameter of 1.392 * 10^6

I get 1392000.

b) 8.4*10^-6

I get 0.000084

Is this right

The first one is correct. The second one is incorrect. Your answer is 8.4 *10^-5

you have 8.4*10^-6; start where the decimal is and count six times to the left because you have a negative exponent. This means the number is smaller than 1. So to left of the decimal we have 8 and since we have

10^-6, we add five zeros to the left of 8. Now you can see that :

0.0000084 is six digits to the left of 4. This number is less than 1.

The sign of the exponent is really what's important. I wrote 10^-6, it is of course 8.4*10^-6 or 8.4E-6 (more convenient)

I hope this helps...

The diameter of the sun you have written correctly. The number of 8.4 x 10^-6 needs one more zero than you have; i.e., you have 4 zeros and you need five.

**Answer this Question**

**Related Questions**

math - Express the following quantities in the scientific notation: According to...

Maths - The mean distance of the sun from the sun is 150 million kilometres....

Maths - The mean distance of the sun from the sun is 150 million kilometres....

scientific notaton - Express the following quantities in the scientific notation...

Physics - these are practice questions that i have the answer to, but i dont ...

Physics - Neutron stars, such as the one at the center of the Crab Nebula, have ...

Physics - Neutron stars, such as the one at the center of the Crab Nebula, have ...

Chemistry- urgent! - Perform the following operations and express the results in...

physics - The diameters of Earth and the Sun are approximately 1.3 107 m and 1....

math - find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16...