Yes. Copper, mercury, and tin are all used to fill in cavities.
Hope this shows! It has all the equations for all of the problems u asked in the comments
Running on sand requires 1.6 times more energy spent than running on hard surface, so the force applied by our foot on sand is less.
Average speed = total distance / time ⇒ total distance = average speed * time
Average speed = 270 km / p hours
distance = d
hours = x
d = 270/p * x
