Concerta and Adderall are medications used to treat attention deficit hyperactivity disorder (ADHD). These drugs help activate the areas of your brain that are responsible for focusing and paying attention. Concerta and Adderall are the brand names of generic medications. The generic form of Concerta is methylphenidate. Adderall is a combination of two generic drugs: amphetamine and dextroamphetamine. A side-by-side comparison of these two ADHD medications shows that theyâre similar in many ways. However, there are some differences.
Direct propulsion system is the most commonly used system on ships. Direct propulsion system is an invariable choice for low speed diesel engines and has a very basic arrangement. It consists of a propeller, which is connected to the main engine with the help of the shaft.
A nother way to study the solar system is to actually go there on a trip called a crewed mission. A space shuttle can bring astronauts and their tools into space to perform experiments, launch satellites, and make observations.