10 PTS!
1 answer:
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Answer:
6 month interval
Explanation:
The distance to a nearby star in theory is more simple than
one might think! First we must learn about the parallax effect. This is the mechanism our eyes use to perceive things at a distance! When we look at the star from the earth we see it at different angles throughout the earth's movement around the sun similar to how we see when we cover on eye at a time. Modern telescopes and technology can help calculate the angle of the star to the earth with just two measurements (attached photo!) Since we know the distance of the earth from the sun we can use a simple trigonometric function to calculate the distance to the star. The two measurements needed to calculate the angle of the star to the earth caused by parallax (in short angle θ) are shown in the second attached photo.
So using a simple trigonometric function we can solve for d which is the distance of the earth to the star:
In the first attached photo a picture where r is the distance to the star and the base of the triangle is the diameter of the earth.
Answer:
final equilibrium temperature of the system is ZERO degree Celcius
Explanation:
Hear heat given by water + iron = heat absorbed by ice
so here first we will calculate the heat given by water + iron
now the heat absorbed by ice so that it will melt and come to the final temperature
now we will have
since it is coming out negative which is not possible so here the ice will not completely melt
so final equilibrium temperature of the system is ZERO degree Celcius