Standing in the air. Sodium and water are pushed together by sound waves. SOURCE: REF. 1. Water droplets, coffee granules, fragments of polystyrene and even a toothpick are among the items that have been flying around in a Swiss laboratory lately â all of them kept in the air by sound waves.
Your status update may also show up on that friend's Timeline. When you tag someone, they'll be notified. Also, if you or a friend tags someone in your post, the post could be visible to the audience you selected plus friends of the tagged person. Learn more about what happens when you create a tag.o tag yourself or your friends in a photo: 1  Click the photo to expand it. 2  Hover over the photo and click Tag Photo at the bottom. 3  Click the person in the photo and start typing their name. 4  Choose the full name of the person you want to tag when it appears.
How To Hide And Unhide Any Facebook Chat Messages. Due to security reasons or privacy concerns, some may choose to hide certain chat messages. In fact, Facebook does allow this feature and you may choose to hide chat messages with any of your friends. Of course the safest way is to delete your chat history if you are worried of unwary eyes. We will guide you through on how to hide chat messages with your contacts on Facebook.