The matching bolt and nut grades identifying markings are designated differently to demonstrate the strength relationship of the two components. Due to the advent of mass assembly it is an acceptable practice for the matching nut to be the stronger component.
Answers. Best Answer: The altitude and therefore, the temperature, together with the age of the cloud, decides if it is made of ice crystals, water droplets or, both. High clouds only made of ice crystals are called cirrus clouds. Those are the left-overs of strong convection bringing moisture all the way to the tropopause, which is the top of the troposphere. Sometimes, cirrus even escape from the troposphere into the stratosphere.
Clouds can seem like a very abstract part of nature. Authors even use imagery of a mass of dark billowing clouds on the horizon to represent some unforeseen threat looming just out of human perception. In reality, the presence of clouds is a much more scientific phenomenon. There are three main varieties of clouds: cirrus, cumulus and stratus. They are made when air rises because of heat, the shape of the landscape or a weather front and is cooled as it reaches higher altitudes. Cumulus clouds are made of different states of water and air. Thermals