The Fluid Filled Cochlea. The pressure changes in the cochlea caused by sound entering the ear travel down the fluid filled tympanic and vestibular canals which are filled with a fluid called perilymph.
Those who love the size of the original iPad Mini 1 will be pleased to find that the size remains unchanged. Both the iPad Mini 1 and the iPad Mini 2 both measure in with a height of 7.87 inches and a width of 5.3 inches. The iPad Mini has only a slight difference in depth, while it weighs slightly more. However, it is still lightweight enough for anyone who wants a small and portable tablet.
The difference between the iPad mini and the iPad mini 2 with Retina display is similar. The iPad mini 1 has a screen resolution of 1,024 x 768 pixels at 163 ppi, while the iPad mini 2 has a Retina screen at 2,048 x 1536 pixels and 326 ppi-twice the pixel density.