• Matéria: ENEM
  • Autor: 2010memm
  • Perguntado 4 anos atrás

Explique o experimento de Eratóstenes


lucasgabrielmends: Oi
kaua9742838: Em 205 aC, Eratóstenes mediu com sucesso a circunferência da Terra, medindo o comprimento da sombra projetada por uma vara. Ele fez a medição em Alexandria e cronometrou a coincidência quando o Sol estava diretamente acima de Syene.
soaresbreno033: Oi
bydwxvdccedd: muito obrigado Kaua me ajudou muito vou marcar sua resposta como a melhor !!!!
leticiapiresfernande: Vcs são TEAM Victor ou TEAM netotoso?
ericabeatrizdasilva1: Team NETOTOSOOOO
leticiapiresfernande: Isso aeee
iracimirandadeassism: ?netotoso?Victor?
claramelquiades50: Team netotoso ಠ◡ಠ
davi9811819: ಠ◡ಠ

Respostas

respondido por: isabellyrossetisilva
539

Em 205 aC, Eratóstenes mediu com sucesso a circunferência da Terra, medindo o comprimento da sombra projetada por uma vara. Ele fez a medição em Alexandria e cronometrou a coincidência quando o Sol estava diretamente acima de Syene.


iracimirandadeassism: Obrigada
iracimirandadeassism: PS: escreve a resposta numa folha e cola no PET
iracimirandadeassism: Foi o que eu fiz
Kyroestudante: Cringe.
claramelquiades50: Obrigada ಠ‿ಠ
GABRIELLYDEOLIVEIRAS: qm q denunciou esta pessoa, pq mano, ela n disse nada dmais.
isabellyrossetisilva: Pois é, acontece...
cristianoricardorodr: cūsao
isabellaalinesousa26: alguém resume pra mim
harunogames6000: obg
respondido por: vchinchilla22
87

Eratóstenes foi o primeiro a medir a circunferência da Terra com boa precisão e comprovar que ela é redonda. Para isso, ele desenvolveu um sistema baseado na semelhança dos triângulos.

Primeiro, ele mediu a distância entre duas cidades egípcias, em linha reta, que estão no mesmo meridiano: Siena e Alexandria, a qual valia aproximadamente 800 km.

No dia do solstício de verão (21 de junho), ao meio-dia, ele mediu, em Alexandria, com o auxílio de uma vara colocada no solo, o ângulo de inclinação do Sol, que deu 7,2° que são aproximadamente 1/50 de uma circunferência (360°).

Logo, ele fez uma regra de três para calcular o comprimento da circunferência da Terra determinando que 800 km x 50 = 40.000 km, de modo que deve ser este o valor da circunferência da Terra.

Saiba mais em: https://brainly.com.br/tarefa/42553415

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