In September 2009, Australian astronomer Robert H.McNaught discovered comet C/2009 R 1 (McNaught). The orbit of this comet is hyperbolic with the Sun at one focus. Because the orbit is not elliptical, the comet will not be captured by the Sun's gravitational pull and instead will pass by the Sun only once. The comet reached perihelion on July 2, 2010 The path of comet can be modeled by the equation x 2 1191.2 2 − y 2 30.9 2 = 1 where x and y are measured in AU (astronomical units). a. Determine the distance (in AU) at perihelion. Round to 1 decimal place. b. Using the rounded value from part (a), if 1 AU≈93,000,000 mi, find the distance in miles.
In September 2009, Australian astronomer Robert H.McNaught discovered comet C/2009 R 1 (McNaught). The orbit of this comet is hyperbolic with the Sun at one focus. Because the orbit is not elliptical, the comet will not be captured by the Sun's gravitational pull and instead will pass by the Sun only once. The comet reached perihelion on July 2, 2010 The path of comet can be modeled by the equation x 2 1191.2 2 − y 2 30.9 2 = 1 where x and y are measured in AU (astronomical units). a. Determine the distance (in AU) at perihelion. Round to 1 decimal place. b. Using the rounded value from part (a), if 1 AU≈93,000,000 mi, find the distance in miles.
Solution Summary: The author calculates the distance (in AU) at perihelion when the path of the comet can be modeled by the equation.
In September 2009, Australian astronomer Robert H.McNaught discovered comet C/2009
R
1
(McNaught). The orbit of this comet is hyperbolic with the Sun at one focus. Because the orbit is not elliptical, the comet will not be captured by the Sun's gravitational pull and instead will pass by the Sun only once. The comet reached perihelion on July 2, 2010 The path of comet can be modeled by the equation
x
2
1191.2
2
−
y
2
30.9
2
=
1
where x and y are measured in AU (astronomical units).
a. Determine the distance (in AU) at perihelion. Round to 1 decimal place.
b. Using the rounded value from part (a), if 1 AU≈93,000,000 mi, find the distance in miles.
To test the power of a car, a Dyno Test sets the wheels on rollers that are lifted off the
ground.
During one test on the car, a point on the tire has a minimum height of 30 cm, a
maximum height of 110 cm, and is spinning constantly at 5 rotations per 1 second.
A point on the tire can be model by the equation h =acos b(t-c) +d
where h represents the height of the point, in cm, and t represents time, in seconds.
If the point starts at the minimum, then the partial graph below shows a sinusoidal
function that could model the height of the point at different times in the rotation.
150
height
(cm)
100
+50
time (s)
5.
Determine a sinusoidal function of the form h=acos b(t-c) +d, that could
represent this situation.
Estimate the length of the major axis of the orbit of Uranus if its orbital period is 84 years.
Determine which conic is the one whose general equation has only one term raised to the square, that is, there’s either one x2 term or one y2 term, but not both.
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