ISP205 Visions of the Universe UNITS
Base Units:
| Unit | Symbol | Physical Quantity |
| Meter | m | length |
| Kilogram | kg | mass |
| Second | s | time |
| Ampere | A | current |
| kelvin | K | temperature |
| mole | mol | amount of substance |
| candela | cd | luminous intensity |
Derived Units:
Time:
| Minute | min | 60 s |
| Hour | hr | 60 min |
| Day | d | 24 hr |
| Year | y | 365.24 d |
Distance:
| Astronomical Unit | AU | 1.496E11 m |
| Lightyear | ly | 63200 AU |
| Parsec | pc | 3.26 ly |
Force:
| Newton | N |
1 m-kg/s2 |
Energy, Work, Heat:
| Joule | J | 1 N-m |
Luminosity, power:
| Watt | W |
1 J/s |
Prefixes: M (106), k (103), c (10-2), m (10-3), u (10-6), n (10-9)
Example: Approximate diameter of the Milky Way Galaxy, 100000 pc=100 kpc or 0.1 Mpc
Any of the above three answers would be correct in CAPA, if units on the answer are required. If the problem asks specifically for the number of parsecs, you should answer in pc and not include the units.