Concept explainers
a.
Find an equation of the orbit.
a.
Answer to Problem 58E
Explanation of Solution
Given information:
Halley’s Comet has an elliptical orbit with the sun at one focus. The eccentricity of the orbit is approximately
Find an equation of the orbit. Place the centre of the orbit at the origin and place the major axis on the
Calculation:
Halley’s Comet has an elliptical orbit. Eccentricity of the orbit is approximately
Now the equation of orbit centre as origin.
Now find parameters,
Since the centre is taken as origin, we have
The length of the major axis
Now the eccentricity of the orbit is,
Again we have,
Now substitute the calculated values in standard equation.
Hence, equation of the orbit is
b.
Use a graphing utility to graph the equation of the orbit.
b.
Answer to Problem 58E
Explanation of Solution
Given information:
Halley’s Comet has an elliptical orbit with the sun at one focus. The eccentricity of the orbit is approximately
Use a graphing utility to graph the equation of the orbit.
Calculation:
Now use a graphing utility to graph the equation of the orbit.
Hence the result is shown in graph.
c.
Find the greatest (aphelion) and least (perihelion) distances from the sun’s centre to the comet’s centre.
c.
Answer to Problem 58E
Aphelion:
Perihelion :
Explanation of Solution
Given information:
Halley’s Comet has an elliptical orbit with the sun at one focus. The eccentricity of the orbit is approximately
Find the greatest (aphelion) and least (perihelion) distances from the sun’s center to the comet’s center.
Calculation:
Now find the greatest (aphelion) and least (perihelion) distances from the sun’s center to the comet’s center.
It is given that sun’s center is located at the focus the comet’s center.
We know that foci lie on the points
Hence the foci are at points
Let us consider the sun to be at the points
We see that smallest distance is the distance between the focus and the nearer vertex.
Greatest distance is the distance between the focus and the farther vertex.
Hence,
Aphelion:
Perihelion :
Chapter 10 Solutions
EBK PRECALCULUS W/LIMITS
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