ALL ABOUT DRONES
A drone is a piece of machinery that does not require any human physical attributes to help it fly. In short, a drone is an Unmanned Aerial Vehicle.
The earliest non-electric Unmanned Aerial Vehicle was seen in 1839 when the Austrian soldiers attacked the city of venice. However, the first electric drones were produced with the help of Nikola Tesla and Reginald Denny during the second world war.
Drones have many capabilities. Some of them include lifting off the ground, while others include spinning in a constant position. Most drones can fly up to 400 to 500 feet, but depending on the quality of those drones, they can achieve a total of 11,000 feet as shown by the DJI Phantom. The quadcopter design of the drone uses 4 propellers to provide both lift and directional control. The “dedicated controller allows the user to send information to the drone using radio waves. Depending on the wavelength of radio waves, the range of the drone is predicted.
ALL ABOUT CLOUD SEEDING
Cloud seeding is a type of weather modification that aims to change the amount or type of precipitation that falls from clouds by dispersing substances into the air that serve as cloud condensation or ice nuclei, which alter the microphysical processes within the cloud.
The first experiments with cloud seeding were conducted in 1946 by American chemist and meteorologist Vincent J. Schaefer, and since then seeding has been performed from aircraft, rockets, cannons, and ground generators. Many substances have been used, but solid carbon dioxide (dry ice) and silver iodide have been the most effective; when used in supercooled clouds (composed of water droplets at temperatures below freezing), they form nuclei around which the water droplets evaporate. The resulting water vapour deposits into ice crystals, which build quickly as water droplets attach themselves. In clouds at temperatures above freezing, calcium chloride particles provide the condensation nuclei around which raindrops form.