An extraterrestrial "eratosthenes" performs the equivalent experiment, that eratosthenes did on earth, on her/his home world. she/he measures the angle of the shadow in her/his alien hometown (alexandria) to be 10 degrees and the distance to the alien well (syene) to be 500 km. what is the radius that the alien eratosthenes estimates for her/his planet?
a. 2865 km
b. 9065 km
c. 18024 km
d. 1500 km
e. 31415 km

a. 2865 km

Explanation:

Eratosthenes observed that the sun's rays formed a vertical angle of 7º 12 ’. Which confirmed that the Earth was not flat, assuming that it had a spherical shape, using the distance between Alexandria and Siena and the measure of the angle of inclination of the solar rays in Alexandria, calculated the circumference of the Earth.

The calculation was made with a simple rule of three:

angle of inclination of the solar rays——————- distance

               360º                                   ————- Planet circumference

And since we know that:

gans

explanation:

vestigial organs (like your appendix) are organs that no longer serve a purpose.

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete