First we have to calculate the volume of the living room:
V = L x W x H = 4.5 m * 3.4 m * 2.9 m
V = 44.37 m³
We know that Density = 1.29 kg/m²
D = m / V
m = D · V
m = 1.29 kg/m³ · 44.37 m³
m = 57.2373 kg ≈ 57.2 kg
Answer: The approximate mass of air in living room is 57.2 kg.
Calculated weight (by experimentally) of Earth is 5.972 × 10²⁴ N
Hope this helps!
Answer:
10880N
Explanation:
We are given that
Mass of elevator, m=850 kg
Acceleration, 

We have to find the tension in the cable.
We know that
When elevator is accelerating upward then tension in the cable

Using the formula

