Dictionary
search :       browse : 
A B C D E F G H I J K L M
  N O P Q R S T U V W X Y Z
         
Description
Related Terms
Everyday Examples
Interactive Checkpoint
More Information
Challenge
How to use this dictionary
Contact
 Everyday Examples
 Dividing Powers Property:  To divide two powers of the same base, subtract the exponent of the denominator from the exponent of the numerator.

Image source: http://library.thinkquest.org/C005462/media/scrossALPHA.jpg

A light year is the distance that light travels in one year, which is 9.46 x 1012 km. The number of light years between the sun and the nearest star system, Alpha Centauri, is 4.36 light years. This number is determined by dividing the actual distance by the length of a light year, (4.12 x 1013 km)/(9.46 x 1012 km). When determining this value, the dividing powers property can be used by subtracting the exponents, which results in 4.12/9.46 x 101 = 0.436 x 101 = 4.36 light years.