將千米轉換為秒差距
千米
定義: A kilometer (symbol: km) is a unit of length in the International System of Units (SI). One kilometer is equivalent to 0.6214 miles.
歷史/起源: The prefix kilo- is a metric prefix indicating one thousand. One kilometer is therefore one thousand meters. The origin of the kilometer is linked to that of the meter, and its current definition as the distance traveled by light in 1/299 792 458 second. This definition is subject to change, but the relationship between the meter and the kilometer will remain constant.
目前用途: It is currently the official unit of measurement for expressing distances between geographical places on land in most of the world. However, there still remain a number of countries that primarily use the mile instead of the kilometer including the United States and the United Kingdom (UK). Unlike the United States, the UK has adopted the metric system; while the metric system is widely used in government, commerce, and industry, remnants of the imperial system can still be seen in the UK's use of miles in its road systems.
秒差距
定義:
千米轉秒差距對照表
| 千米 [km] | 秒差距 [pc] |
|---|---|
| 0.01 km | 0.000000 pc |
| 0.10 km | 0.000000 pc |
| 1 km | 0.000000 pc |
| 2 km | 0.000000 pc |
| 3 km | 0.000000 pc |
| 5 km | 0.000000 pc |
| 10 km | 0.000000 pc |
| 20 km | 0.000000 pc |
| 50 km | 0.000000 pc |
| 100 km | 0.000000 pc |
| 1000 km | 0.000000 pc |
如何將千米轉換為秒差距
1 km = 0.000000 pc
1 pc = 30856775812800 km
範例
Convert 15 km to pc:
15 km = 15 × 0.000000 pc = 0.000000 pc
