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.
1 When the molecules of a gas are heated, they move faster. 2  The faster moving molecules inside the balloon push against the material the balloon is made out of. 3  This push from the inside air overcomes the inward pull of the balloon, making the balloon get bigger. When the bottle is cooled, the molecules inside the bottle move slower, the slower moving molecules inside the bottle push less hard against the bubble film, and the outside air overcomes the push from the inside air, forcing the bubble down.