Suppose you are in Whitehorse, Yukon, and drop a bowling ball from a height of one meter into a bucket of water at 10 degrees Celsius. Then, you drop a bowling ball of the same weight, mass, and size from the same height into another bucket at negative 10 degrees Celsius. Which ball would hit the bottom of the bucket fastest?

Coplanar molecules are determined by its structure through the geometric configuration of the given molecule. Only linear configurations are coplanar unlike the trigonal planar, tetrahedral,etc. configurations. The sp hybridization also tells whether the arrangement is coplanar or not.