Answer & Explanation:
The nerve impulses start in the dendrites then moves down the axon starting in the axon. Nerve impulses speed up the myelin sheath. Then through the nodes of ranvier speeding up action potential then at the axon terminal the electrical impulse goes through the synapse through electrical then chemical with neurotransmitters and electrical again back to a dendrite.
I think the word would be increases. I don't know what the options are though.
Answer:
Part a)
Part b)
direction = downwards
Explanation:
As we know that the negative charge will experience the force due to some other charge below it
the force is given as
now we know that
now plug in all data
since this is a repulsion force so it must be a negative charge
Part b)
As per Newton's III law it will exert equal and opposite force on it
So here the force on the charge below it will be same in magnitude but opposite in direction
so here we have
direction = downwards
It is fine to use the equation given by Plitter, since we are told that the mass is about the same as it is now, and I seriously doubt the original question wants the student to go into relativistic effects, electron degeneracy pressure and magnetic effects that govern a real white dwarf star.
There is no need to make it unnecessarily complicated, when the question is set at high school level. The question asks, given a particular radius, and a given mass, what will the density be (which in this case will be the average density). To answer the question, one needs to know the mass of the sun (which is about 2×1030 Kg. One needs to convert the diameter to a radius, and then calculate the spherical volume of the white dwarf. Then one can use the formula given above, namely density=mass/volume
