Answer:
They appear to recede from our viewpoint.
That is, their emitted spectra are shifted toward the red (red-shift).
The wave-lengths that are received on earth are somewhat longer because of the "Doppler" shift of the receding atoms.
A control variable is the one element that is not changed throughout an experiment.A dependent variable is a variable whose variation does not depend on that of another.A independent variable is a variable whose value depends on that of another.
Answer:
0.0085 Wb
Explanation:
a = Side of square
r = Radius of circle
= Magnetic flux through square loop =
Magnetic flux is given by
For square
The length of the square will be equal to the circumference of the circle
For circle
The flux that passes through the circular loop is 0.0085 Wb
The period of Neptune is 165 years if the semi-major axis is 30.11 using the given formula.
Answer: Option D
<u>Explanation:
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The period of any planet revolutions around the sun can be determined using Kepler third law. As that law states that square to the period of one complete revolution of every planet is equal to cube of semi major axis of that planet. So the formula can be derived as
Where T is the time taken for completing one revolution and a is the semi-major axis of the planet.
As here Neptune's semi major axis is given as 30.11. So the period of Neptune can be determined as follows:
Then take square root of this value:
T = 165 years
Thus, the Neptune takes 165 years for one complete revolution of the sun.