The Earth's magnetic field is approximately 0.5 Gauss. What is the magnetic energy density of this field

The  magnetic energy density  is  

Explanation:

From the question we are told that  

    The  earths magnetic field is  

Now

=>        

So  

Generally the magnetic energy density is  mathematically represented as

  Here is the  permeability of  free space with a constant value

substituting values for equation above  

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation: