The final momentum is 20.00 kg*m/s
Explanation:
The momentum of an object is given by:
where
m is the mass of the object
v is its velocity
For the object in the problem, the initial momentum is
Then, the mass is doubled:
m' = 2m
And the velocity is also doubled:
v' = 2v
So, the new momentum will be:
So, the final momentum is 4 times the initial momentum.
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Answer:
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
Mass of the milkyway galaxy :
The magnitude of the mass of the Milky Way galaxy =
Galaxies do not appear to have sufficient matter inside them to keep shaping modern stars at the rates that they do. Presently, astronomers have caught a universe within the act of reusing fabric that it already tossed out, which may clarify the discrepancy. New perceptions give the primary coordinate evidence of gas streaming into distant galaxies that are effectively making infant stars, offering support for the "galactic recycling" theory.
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