Something rounded. No corners, such as a sphere.
Aerodynamics.
Water will travel faster in gravel than sandStudents in secondary school should know this!
They travel faster through solids
The denser the faster. ie: it will travel faster through quartz than sandstone.
sound travel faster through soled because of tighter packed particles
sound travels faster through steel
faster apex.....................................................................................................................
Through metals
It doesn't travel faster through a vacuum. In our Universe there is no such thing as empty space.
Waves travel faster through denser materials. However, Electromagnetic waves travel faster through less dense materials. It travels fastest in vacuum.
Light travels much faster than sound, through wood.
it travels faster through air.
Iron is denser than air. Waves travel faster through denser medium.