Powered ventilation systems should be turned on for how many minutes before starting the engine to ensure all gasoline vapors ha
2 answers:
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Explanation:
It is given that,
Mass of the woman, m₁ = 52 kg
Angular velocity,
Mass of disk, m₂ = 118 kg
Radius of the disk, r = 3.9 m
The moment of inertia of woman which is standing at the rim of a large disk is :
I₁ = 790.92 kg-m²
The moment of inertia of of the disk about an axis through its center is given by :
I₂ =897.39 kg-m²
Total moment of inertia of the system is given by :
I = 1688.31 kg-m²
The angular momentum of the system is :
So, the total angular momentum of the system is 4980.5 kg-m²/s. Hence, this is the required solution.
The basic relationship between wavelength 
, frequency f and speed c of an electromagnetic wave is
where c is the speed of light. Substituting numbers, we find:
where c is the speed of light. Substituting numbers, we find:
Answer:
5 years
Explanation: