Which of these practical interventions did Han scientists devise
The wheelbarrow
The telescope
The incline plane
The suspension bridge
The wheelbarrow and the suspension bridge were practical interventions devised by Han scientists. The telescope was not invented by the Han Dynasty, and the incline plane was already known and used before their time.
Han scientists devised several practical interventions, including:
1. The Wheelbarrow: The Han Dynasty (206 BCE to 220 CE) is credited with inventing the wheelbarrow. It was used for transporting goods and materials more efficiently by using a single wheel and handles.
2. The Telescope: While the Han Dynasty did not specifically invent the telescope, they made advancements in optics and developed a rudimentary form of a telescope called the seer's mirror. This device used concave mirrors to aid in divination and observing distant objects.
3. The Incline Plane: The Han Dynasty made use of the inclined plane, which is a simple machine used to move heavy objects. By using ramps or sloped surfaces, they could reduce the effort required to lift or move objects.
4. The Suspension Bridge: The Han Dynasty developed techniques for constructing suspension bridges using iron chains. This innovation allowed for the construction of bridges that could support heavy loads over long spans.
Although it is worth noting that other civilizations, such as the ancient Egyptians and Romans, had also independently developed some of these practical interventions.