These are particles with interactions similar to those of the particles we know but with heavier masses because they have additional momentum contained in an extra dimension. (discovermagazine.com)
Gravity footings rely on a large and heavy mass of concrete to hold the turbine in place, while, if suitable bedrock is present a smaller mass of concrete can be bolted to the bedrock using rock anchors. (ramblingsdc.net)
The i8 rides pretty well even on choppy cement surfaces, as the combination of a long wheelbase and the placement of heavy masses at either end of the car helps calm the ride motions. (automobilemag.com)