Answer:
It takes millions sometimes hundreds of millions Explanation:
Answer: Mechanical Energy and Electrical Energy
Explanation: A generator converts mechanical energy into electrical energy, while a motor does the opposite - it converts electrical energy into mechanical energy.
Answer:
Explanation:
We can approximate the hurricane as a rotating uniform cylinder, so its energy is the rotational kinetic energy, given by:
(1)
where
I is the moment of inertia
is the angular velocity
The moment of inertia of a cylinder rotating about its axis is
where
M is the mass
R is the radius
So formula (1) can be written as
(2)
For an object in rotation, the linear speed at the edge is related to the angular velocity by
So we can rewrite (2) as
where we have:
is the speed at the edge of the hurricane
We have to calculate the mass of the cylinder. We have:
(radius)
(height)
So the volume is
The density is
So the mass is
Therefore, the energy is
Gold’s molar mass is about 196 while aluminum is about 27, thus 50cm of gold has more mass