A) Metallurgy
I hope this one is the correct one , its been a while sine I did history .
Good Luck!
As an object begins to move faster, air resistance or drag increases. Drag means the amount of air resistance impacting an object when it is moving. ... When the air is denser, this slows down the movement of objects because the object has to shove aside heavier molecules
hope this helps :)
M = 0,23kg = 230g
d = 1g/cm³
V = 230g / 1g/cm³ = 230cm³ = 0,23L
Answer: The scientific reasons for going to Mars can be summarised by the search for life, understanding the surface and the planet's evolution, and preparing for future human exploration. Understanding whether life existed elsewhere in the Universe beyond Earth is a fundamental question of humankind.
Explanation:
The escape velocity required for gas molecules to overcome the Earth's gravity and go off to outer space is 1.12x10^3 m/s at 15 degrees Celcius.
We need to calculate the rms or root mean speed of the gas. So, the velocity of the gas must be 1.12x10^3 m/s.
v = √((3RT)/M)
where R = gas constant
T = temperature of the gas in Kelvin
M = molar mass of the gas
1.12x10^3 m/s = √((3*8.314*(15+273))/M)
Solve for M<span />