answer:Social media and technology have a significant impact on youth culture and habits. They can influence behavior, provide a platform for self-expression, and connect individuals with others who share similar interests. However, excessive use can lead to addiction, anxiety, and isolation. It is important for parents and caregivers to monitor social media and technology use and encourage healthy habits.

answer:A crankshaft converts linear motion to rotational motion by converting the reciprocating motion of the piston into rotary motion. This is accomplished through the use of offset shafts called connecting rods which attach the piston to the crankshaft. When the piston moves up and down, it drives the connecting rod which rotates around the crankshaft, resulting in the conversion of linear motion to rotational motion.

answer:Technology can aid in the preservation and documentation of historic sites through the use of 3D scanning and modeling, virtual and augmented reality, drones for aerial mapping, and digital databases for storing and accessing historical information.

answer:Some common themes in the works of contemporary Egyptian writers include identity, gender roles, politics, social justice, and the complexities of modern Egyptian society.