football hemets have pads that are filled with air and thick foam so when they are hit the foam asorbs the hit and the air keeps the hard outer shell of the helmet from hiting the players head
Answer: When a pathogen enters their colony, ants change their behavior to avoid the outbreak of disease. In this way, they protect the queen, brood and young workers from becoming ill. These results, from a study carried out in collaboration between the groups of Sylvia Cremer at the Institute of Science and Technology Austria (IST Austria) and of Laurent Keller at the University of Lausanne, are published today in the journal Science.
Explanation: search for it.
I believe that a light bulb releases visible light and a radio antenna releases a radio waves
Answer:
The focal length of a lens is refers to the distance from the center of the lens to the principal foci.
It is strong enough to penetrate through flesh but not bone so we can see if there are fractures or breaks in our skeleton
