In a concussion which part of the brain might have been damaged having trouble sleeping and asleep at different times?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f