What parts of a shark fossilize other than its teeth? (has everything to do with my last question)

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Which bonds are found inside a water molecule

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?