Answer:
Meter, Gram and Liter.
Explanation:
In the metric system, the standard units for the below are;
Length - Meter
Mass - Gram
Volume - Liter.
Answer:
kg m/s
Explanation:
e = Charge = C
V = Voltage = 
c = Speed of light = m/s
Momentum is given by

The unit of MeV/c in SI fundamental units is kg m/s
This is in the thermosphere which is at an altitude of 85-520km
To find or discover by investigation?
Oxygen. Plants need water sunlight and CO2 to make their food. They get the carbon and the energy from the CO2 and the sun, and they need water as well. Then they release oxygen