Ideas of normal and abnormal are largely shaped by social standards and can have profound social ramifications. Learning Objective. Analyze the challenges inherent in trying to define normal and abnormal. What is considered normal changes with changing societal standards. Despite the challenges inherent in defining normal, it is still important to establish guidelines so as to be able to identify and help people who are suffering. This is the goal of the Diagnostic and Statistical Manual of Mental Disorders (known as the DSM-5), a publication in the field of clinical psychology.
Launching a water rocket. The rocket is in its peak with no water inside it. Water and gas are used in combination, with the gas providing a means to store energy, as it is compressible, and the water increasing the propellant mass fraction and providing greater force when ejected from the rocket's nozzle.
WD-40 was developed in 1953 by Norm Larsen, founder of the Rocket Chemical Company, in San Diego, California. WD-40, abbreviated from the phrase Water Displacement, 40th formula, indicating it was the 40th formula the chemists tried that turned to be the right one.e claims he arrived at a successful formula on his 40th attempt. WD-40 is primarily composed of various hydrocarbons. WD-40 was first used by Convair to protect the outer skin and, more importantly, the paper-thin balloon tanks of the Atlas missile from rust and corrosion.