Pictures in email messages that are actually linked and downloaded from the Internet can also be used as a way to confirm that you opened the message. This is known as a web beacon. For example, a junk email sender can confirm that they have reached an active email address when the picture in the message is downloaded.ote When you click Download Pictures in a message that you are previewing in the Reading Pane, the message is automatically saved and displays the pictures again the next time that you open the message.
1 Sir Isaac Newton was an English mathematician and mathematician and physicist who lived from 1642-1727. 2  The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature.
In the same way he found that the amount of the gravity between the Sun and a planet is Force = Ks  (Sun mass) / (r)2. Using his third law of motion, Newton reasoned that these forces must be of the same magnitude but acting in the opposite directions. This led him for form his Universal Law of Gravitation.