A dirty air filter will cause your RAV4 to lose 1 - 3 mpg, depending on your driving, you can save 70 - 100 gallons of gas per year simply by changing your filter regularly. The video above, shows you where the engine air filter is located in your RAV4 and how to change it!
A flatbed scanner is a type of scanner which uses a flat, glass  surface for scanning documents. Some of its disadvantages are  scanning is done page by page, too much desk â¦ space is taken and not  suitable for film scanning tasks. 1 person found this useful.n advantage of a scanner is the ability to produce accurate and  high quality images. A disadvantage is the amount of memory the  images can use.
How Scanners Work. In a nutshell, a scanner is a device that analyzes the surface of an image, printed text or an object and converts it into a two-dimensional digital image.Scanners come in different shapes and sizes depending on the intended use.The most common scanner for home and offices today is the flatbed scanner. newer technology that is rising in popularity in the field of flatbed scanners is the use of Contact Image Sensors (CIS). Instead of using mirrors and lenses found in a CCD scanner, CIS scanners use red, green and blue LEDs to produce white light.