Answer:
-29.4 m/s
Explanation:
Given:
v₀ = 0 m/s
t = 3 s
a = -9.8 m/s²
Find: v
v = at + v₀
v = (-9.8 m/s²) (3 s) + (0 m/s)
v = -29.4 m/s
Answer:
3600 kg
Explanation:
From the question,
Density = Mass/Volume
D = M/V.............................. Equation 1
Where D = Density of the substance, M = mass of the substance, V = Volume of the subtance.
Make M the subject of the equation
M = D×V ............................ Equation 2
Given: D = 1200 kg/m³, V = 3 m³.
Substitute these values into equation 2
M = 1200×3
M = 3600 kg.
Hence the mass of the substance is 3600 kg
The answer is D.nitrogen. the atmosphere is mostly made up of nitrogen.(95% is nitrogen) and (2% <span>oxygen</span>) and and (3% of other gases)
