Answer:
a. passing from south end of solenoid to north end and is decreasing in magnitude
Explanation:
by taking into account the Lenz's law
From the Lenz's law we know that if the self-induced emf is due to a decrease in the current, the self-induced current is in a opposite direction. In the other case, when the current increase, the self-induced current is in the same direction that the initial current in the solenoid.
If we assume the second case (the current is increasing) the change in the magnetic flux is negative and the self-induced current contributes to the initial current
I hope this is usefull for you
regards
Explain or message me what your trying to ask!
Yup, I think you add all of them
Our Sun is in the main sequence star stage.
From there our Sun will evolve to be a red giant.
When it evolves many many years from now it will engulf all of the inner planets. But don't worry, that won't happen in our lifetime!
From there the red giant (sun) will die. The death of a red giant is known as a planetary nebula. Though at the center of the nebula there is still a burning core.
When the debris flies away from the planetary nebula, our Sun will turn into a white dwarf, then the core will burn out which gives us a black dwarf.
I've provided an image of a good life cycle of the star, if you follow along with the brief description I've given you it should make sense!
If you have any questions let me know! I hope this helps!
Answer:
a) Since the sun is 400 times a moon's distance from earth, that must mean it looks 400 times smaller than it would if it were a moon's distance away. If the moon eclipses the sun perfectly, then that means that the sun is 400 times larger than the moon. Therefore the diameter of the sun is also 400 times larger than the diameter of the moon.
b) If the sun is 400 times bigger than the moon, then the radius of the sun is also 400 times bigger than the radius of the moon. The volume of a sphere is given by 4 3 π r 3 43πr3. If the moon's radius is r, then the sun's radius is 400r. The volume of the sun will then be 6.4×107 times larger than the volume of the moon.
c) the angular size is 2 arctan 0.09 ≈ 10.286 2arctan0.09≈10.286. Using similar triangles, where the height of the new triangle is the given distance to the moon from Earth, then I would calculate the diameter of the moon as 2 ⋅ ( 3.8 × 10 5 ) tan 5.14 2⋅(3.8×105)tan5.14 kilometers ≈ 6.84 × 10 4 ≈6.84×104 kilometers.