A room is 5m long, 4m wide and 3m high. What is the mass of the air it contains?
回答 (3)
2018-12-15 12:22 am
density of air ρa = 1.25 kg/m^3
mass m = Vol.*ρa = 5*4*3*1.25 = 75.0 kg
mass m = Vol.*ρa = 5*4*3*1.25 = 75.0 kg
2018-12-20 5:19 pm
Given,
Volume (v) = 5m x 4m x 3m = 60m³
Density of air (ρa) = 1.225 kg/m³
Mass (m) = ?
We know that:-
Density (ρa) = mass (m) / volume (v)
Mass (m) = density (ρa) x volume (v)
= 1.225 kg/m³ x 60m³
= 73.5kg
∴ mass (m) = 73.5 kg.
Volume (v) = 5m x 4m x 3m = 60m³
Density of air (ρa) = 1.225 kg/m³
Mass (m) = ?
We know that:-
Density (ρa) = mass (m) / volume (v)
Mass (m) = density (ρa) x volume (v)
= 1.225 kg/m³ x 60m³
= 73.5kg
∴ mass (m) = 73.5 kg.
2018-12-14 8:56 pm
V=5×4×3=60 m3
Google the density of air, 1.29kg/m3
m=1.29×60=77.4 kg
Google the density of air, 1.29kg/m3
m=1.29×60=77.4 kg
收錄日期: 2021-05-01 22:32:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20181214124425AALhLUl