Climate and Biomes. Climate. We have observed that plants require light, water, carbon dioxide, soil minerals and some reasonable temperature to survive. We have considered most of these factors and it is time to consider temperature, itself tied into all of these other factors in some way. This one environmental factor strongly determines the distribution of plants on the planet. Latitude. The Equator.
Stopping sight distance is the sum of two distances: (1) the distance traversed by the vehicle from the instant the driver sights an object necessitating a stop to the instant the brakes are applied; and (2) the distance needed to stop the vehicle from the instant brake application begins.
PD stands for pupillary distance which simply means the distance between your pupils. In order for our glasses to perform at their best, we need to create prescription eyeglass lenses that can match the distance between your eyes, so the center of each lens aligns with the center of your pupils. For this reason, we need your pupillary distance measurement â also known as the PD measurement.