yes star A according to the "blueshift and redshift" wold be more blue because it is closer as it moves further away it will be percieved as red
Answer:
guidelines
Explanation:
It gives perameters for her abilities :)
It is a compound machine i think, tell me if its right!
Answer: The new penny is not pure copper
Explanation:
Density
is defined as a relation between the mass
and the volume
:

Now, we are told the density of pure copper is:

And we are given the mass and volume of the new penny, with which we can calculate its density:

As we can see the density of this penny is not equal to the density of pure copper, hence the new penny is not pure copper.