What is the approximate diameter of the moon.

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SUMMARY

The approximate diameter of the Moon can be calculated using the formula R = S/theta, where R is the radius of the circle formed by the distance to the Moon, S is the arc length, and theta is the angle subtended by the Moon in radians. Given that the Moon subtends an angle of 9.06 x 10^-3 radians and is located 3.84 x 10^8 meters from Earth, the diameter can be derived from the relationship between the arc length and the angle. This discussion emphasizes the geometric relationship between the Moon's distance and its angular size to determine its diameter accurately.

PREREQUISITES
  • Understanding of basic trigonometry and geometry
  • Familiarity with angular measurements in radians
  • Knowledge of the formula for arc length in a circle
  • Basic concepts of celestial mechanics
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  • Research the formula for arc length in circles
  • Learn about angular measurements and conversions between degrees and radians
  • Explore the concept of celestial distances and their measurements
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zman459
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the moon subtends an angle of 9.06 x 10^-3 radians amd os 3.84 x 10^8 meters from the earth. What is the approximate diameter of the moon.

so i think it has something to do with formula R=S/theta but I'm not sure how to compare the moon and the Earth information to find the diameter of the moon please help!
 
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zman459 said:
the moon subtends an angle of 9.06 x 10^-3 radians amd os 3.84 x 10^8 meters from the earth. What is the approximate diameter of the moon.

so i think it has something to do with formula R=S/theta but I'm not sure how to compare the moon and the Earth information to find the diameter of the moon please help!
Think of a circle around the Earth with radius = distance to the moon. The moon takes up only a small part of that circumference. Find the circumference of that circle. The distance the moon occupies on that circumference is the diameter of the moon. How is that distance related to the angle the moon subtends?

AM
 

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