Need help with these problems! Thanks so much

Answer:
14.SI unit of
Distance →Metre(m)
Time →second(s)
Mass→kilogram(kg)
15. Dynamics
16. Optics
17. Electromagnetism
18.Thermodynamics
Answer:
14)
Distance : metres
Time: seconds
Mass: kilograms
15) Mechanics
16) Optics
17) Electromagnetism
18) Thermodynamics
Explanation:
Si units stand for 'International Units' these are units that are used universally for certain quantities
Hope this helps :)