Home Remedies for Whiter Teeth. Some people still prefer the age-old home remedy of baking soda and a toothbrush to gently whiten teeth at home. Also, some foods such as celery, apples, pears, and carrots trigger lots of saliva, which helps wash away food debris on your teeth.
Roche limit. n. The smallest distance at which a natural satellite can orbit a celestial body without being torn apart by the larger body's gravitational force. The distance depends on the densities of the two bodies and the orbit of the satellite.
Size limits. Email standards such as MIME don't specify any file size limits, but in practice email users will find that they can't successfully send very large files across the Internet. This is because of a number of potential limits: Mail systems often arbitrarily limit the size their users are allowed to submit.