Reflective Shield

Question: A shield can reflect projectiles which travel at 4/5 of their original speed after being reflected. A missile is shot towards the shield at 700 km/h. At what speed did it go after its reflection?

Question: During what month do people sleep the least?

Question: Two men were on a ship. They were both facing opposite directions, one facing east and the other facing west. But, they were both seeing each other. *WITHOUT MIRRORS* How is this possible?

Question: When is 99 more than 100?

Question: Which eight-letter word still remains a word after removing each letter from it?

Question: What goes through towns and over hills, but never moves?