{"id":2499,"date":"2016-09-18T22:51:00","date_gmt":"2016-09-18T22:51:00","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=2499"},"modified":"2024-08-22T17:18:58","modified_gmt":"2024-08-22T17:18:58","slug":"exercicios-de-vestibulares-com-resolucoes-comentadas-sobre-notacao-cientifica-ordem-de-grandeza-e-algarismos-significativos","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/introducao\/notacao-cientifica-ordem-de-grandeza-e-algarismos-significativos\/exercicios-de-vestibulares-com-resolucoes-comentadas-sobre-notacao-cientifica-ordem-de-grandeza-e-algarismos-significativos\/","title":{"rendered":"Nota\u00e7\u00e3o Cient\u00edfica, Ordem de Grandeza e Algarismos Significativos"},"content":{"rendered":"

Exerc\u00edcios de vestibulares com resolu\u00e7\u00f5es comentadas sobre <\/b><\/span><\/span><\/span><\/p>\n

Nota\u00e7\u00e3o Cient\u00edfica, Ordem de Grandeza e Algarismos Significativos<\/b><\/span><\/span><\/span><\/p>\n

01-(Unioeste-PR)<\/b><\/span><\/span><\/span> <\/b>Com base na <\/b><\/span><\/span><\/span>teoria dos algarismos significativos, <\/b><\/span><\/span><\/span>com a <\/b><\/span><\/span><\/span>utiliza\u00e7\u00e3o da r\u00e9gua<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

centimetrada<\/b><\/span><\/span><\/span> (figura), <\/b><\/span><\/span><\/span>\u00e9 correto afirmar <\/b><\/span><\/span><\/span>que o <\/b><\/span><\/span><\/span>comprimento da barra acima da r\u00e9gua<\/b><\/span><\/span><\/span> \u00e9:<\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>7,30 cm. <\/b><\/span><\/span><\/span>b) <\/b><\/span><\/span><\/span>7,35 cm. <\/b><\/span><\/span><\/span>c) <\/b><\/span><\/span><\/span>7,3 cm <\/b><\/span><\/span><\/span>d) <\/b><\/span><\/span><\/span>73,0 mm. <\/b><\/span><\/span><\/span>e) <\/b><\/span><\/span><\/span>7, 40 cm.<\/b><\/span><\/span><\/span><\/p>\n

02-(Cefet-PE)<\/b><\/span><\/span><\/span> A <\/b><\/span><\/span><\/span>medi\u00e7\u00e3o do comprimento de um l\u00e1pis <\/b><\/span><\/span><\/span>foi realizada por um aluno <\/b><\/span><\/span><\/span>usando uma r\u00e9gua graduada em mm. <\/b><\/span><\/span><\/span>Das <\/b><\/span><\/span><\/span>alternativas apresentadas, <\/b><\/span><\/span><\/span>aquela que <\/b><\/span><\/span><\/span>expressa corretamente <\/b><\/span><\/span><\/span>a medida obtida \u00e9:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

03-(PUC-SP)<\/b><\/span><\/span><\/span> <\/b>O n\u00famero de algarismo significativos de 0,00000000008065 cm \u00e9:<\/b><\/span><\/span><\/span><\/p>\n

a)\u00a0\u00a0<\/b><\/span><\/span><\/span>3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span>b) <\/b><\/span><\/span><\/span>4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span>c) <\/b><\/span><\/span><\/span>11\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span>d) <\/b><\/span><\/span><\/span>14\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span>e) <\/b><\/span><\/span><\/span>15\u00a0\u00a0<\/b><\/span><\/span><\/span><\/p>\n

04- (UNIFESP-SP)<\/b><\/span><\/span><\/span> <\/b>Na <\/b><\/span><\/span><\/span>medida de temperatura <\/b><\/span><\/span><\/span>de uma <\/b><\/span><\/span><\/span>pessoa<\/b><\/span><\/span><\/span> por meio de um <\/b><\/span><\/span><\/span>term\u00f4metro cl\u00ednico, <\/b><\/span><\/span><\/span>observou-se que o <\/b><\/span><\/span><\/span>n\u00edvel de merc\u00fario estacionou na regi\u00e3o entre 38 \u00baC e 39 \u00baC <\/b><\/span><\/span><\/span>da escala, como est\u00e1 <\/b><\/span><\/span><\/span>ilustrado na figura.<\/b><\/span><\/span><\/span><\/p>\n

Ap\u00f3s a <\/b><\/span><\/span><\/span>leitura da temperatura, <\/b><\/span><\/span><\/span>o m\u00e9dico <\/b><\/span><\/span><\/span>necessita<\/b><\/span><\/span><\/span> do <\/b><\/span><\/span><\/span>valor transformado <\/b><\/span><\/span><\/span>para uma <\/b><\/span><\/span><\/span>nova escala, <\/b><\/span><\/span><\/span>definida por <\/b><\/span><\/span><\/span>t<\/b><\/span><\/span><\/span>x<\/b><\/span><\/span><\/sub><\/span>\u00a0= 2t<\/b><\/span><\/span><\/span>c<\/b><\/span><\/span><\/sub><\/span>\/3 <\/b><\/span><\/span><\/span>e em <\/b><\/span><\/span><\/span>unidades \u00baX, <\/b><\/span><\/span><\/span>onde <\/b><\/span><\/span><\/span>t<\/b><\/span><\/span><\/span>c<\/b><\/span><\/span><\/sub><\/span>\u00a0\u00e9 a temperatura na escala Celsius. <\/b><\/span><\/span><\/span>\"\"<\/p>\n

Lembrando de seus <\/b><\/span><\/span><\/span>conhecimentos sobre algarismos significativos, <\/b><\/span><\/span><\/span>ele <\/b><\/span><\/span><\/span>conclui <\/b><\/span><\/span><\/span>que o <\/b><\/span><\/span><\/span>valor mais apropriado para a temperatura t<\/b><\/span><\/span><\/span>x<\/b><\/span><\/span><\/sub><\/span>\u00a0<\/b><\/span><\/span><\/span>\u00e9:<\/b><\/span><\/span><\/span><\/p>\n

a)\u00a0<\/b><\/span><\/span><\/span>25,7 \u00baX. <\/b><\/span><\/span><\/span>b) <\/b><\/span><\/span><\/span>25,7667 \u00baX.\u00a0 <\/b><\/span><\/span><\/span>c) <\/b><\/span><\/span><\/span>25,766 \u00baX. d) 25,77 \u00baX. e) 26 \u00baX.<\/b><\/span><\/span><\/span><\/p>\n

05-(FUVEST-SP)<\/b><\/span><\/span><\/span> <\/b>Qual \u00e9 a <\/b><\/span><\/span><\/span>ordem de grandeza do n\u00famero de voltas dadas pela roda de um autom\u00f3vel ao percorrer uma estrada de 200km?<\/b><\/span><\/span><\/span>\"\"<\/p>\n

a) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

b) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

c) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

d) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>7<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

e) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>9<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

06-(CEFET-MG)<\/b><\/span><\/span><\/span> <\/b>Nos <\/b><\/span><\/span><\/span>trabalhos cient\u00edficos, <\/b><\/span><\/span><\/span>n\u00fameros <\/b><\/span><\/span><\/span>muito grandes ou pr\u00f3ximos de zero, s\u00e3o escritos <\/b><\/span><\/span><\/span>em <\/b><\/span><\/span><\/span>nota\u00e7\u00e3o cient\u00edfica, <\/b><\/span><\/span><\/span>que consiste em um <\/b><\/span><\/span><\/span>n\u00famero x, tal que 1 < x < 10 multiplicado por uma pot\u00eancia de base 10. <\/b><\/span><\/span><\/span><\/p>\n

Assim sendo, <\/b><\/span><\/span><\/span>0,00000045 deve ser escrito da seguinte forma:<\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>0,45.10<\/b><\/span><\/span><\/span>-7<\/b><\/span><\/span><\/sup><\/span> <\/b>b) <\/b><\/span><\/span><\/span>4,5.10<\/b><\/span><\/span><\/span>-7<\/b><\/span><\/span><\/sup><\/span> <\/b> c) <\/b><\/span><\/span><\/span>45.10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span> <\/b> d) <\/b><\/span><\/span><\/span>4,5.10<\/b><\/span><\/span><\/span>-8<\/b><\/span><\/span><\/sup><\/span> <\/b>e) <\/b><\/span><\/span><\/span>4,5.10<\/b><\/span><\/span><\/span>-5<\/b><\/span><\/span><\/sup><\/span><\/p>\n

07-(UFRGS)<\/b><\/span><\/span><\/span> <\/b>Considere que o <\/b><\/span><\/span><\/span>corpo de uma determina pessoa cont\u00e9m 5,5 litros de sangue e 5 milh\u00f5es <\/b><\/span><\/span><\/span><\/p>\n

de gl\u00f3bulos vermelhos por mil\u00edmetro c\u00fabico de sangue.
\n<\/b><\/span><\/span><\/span>Com base <\/b><\/span><\/span><\/span>nesses dados, <\/b><\/span><\/span><\/span>\u00e9 <\/b><\/span><\/span><\/span>correto afirmar que o n\u00famero de gl\u00f3bulos vermelhos no corpo dessa pessoa \u00e9:
\nA) <\/b><\/span><\/span><\/span>2,75.10<\/b><\/span><\/span><\/span>19<\/b><\/span><\/span><\/sup><\/span>
\n<\/b><\/span><\/span><\/span>B) <\/b><\/span><\/span><\/span>5,5.10<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/sup><\/span>
\n<\/b><\/span><\/span><\/span>C) <\/b><\/span><\/span><\/span>5.10<\/b><\/span><\/span><\/span>11<\/b><\/span><\/span><\/sup><\/span>
\n<\/b><\/span><\/span><\/span>D) <\/b><\/span><\/span><\/span>5,5.10<\/b><\/span><\/span><\/span>12<\/b><\/span><\/span><\/sup><\/span>
\n<\/b><\/span><\/span><\/span>E) <\/b><\/span><\/span><\/span>2,75.10<\/b><\/span><\/span><\/span>13<\/b><\/span><\/span><\/sup><\/span> <\/b>\"\"<\/p>\n


\n<\/span><\/span><\/span>08-(UFRGS)<\/b><\/span><\/span><\/span> <\/b>Durante os <\/b><\/span><\/span><\/span>jogos Pan-Americanos de Santo Domingo,<\/b><\/span><\/span><\/span> os brasileiros <\/b><\/span><\/span><\/span>perderam o ouro<\/b><\/span><\/span><\/span><\/p>\n

para os cubanos por <\/b><\/span><\/span><\/span>37 cent\u00e9simos de segundo nas provas de remo. Dentre as alternativas, o valor mais pr\u00f3ximo<\/b><\/span><\/span><\/span> desse tempo, <\/b><\/span><\/span><\/span>medido em horas,<\/b><\/span><\/span><\/span> \u00e9:
\n<\/b><\/span><\/span><\/span>a) <\/b><\/span><\/span><\/span>1,03.10<\/b><\/span><\/span><\/span>-4<\/b><\/span><\/span><\/sup><\/span>
\n<\/b><\/span><\/span><\/span>b) <\/b><\/span><\/span><\/span>1,3 .10<\/b><\/span><\/span><\/span>-4<\/b><\/span><\/span><\/sup><\/span>
\n<\/b><\/span><\/span><\/span>c) <\/b><\/span><\/span><\/span>1,03.10<\/b><\/span><\/span><\/span>-3<\/b><\/span><\/span><\/sup><\/span>
\n<\/b><\/span><\/span><\/span>d) <\/b><\/span><\/span><\/span>1,3 .10<\/b><\/span><\/span><\/span>-3<\/b><\/span><\/span><\/sup><\/span>
\n<\/b><\/span><\/span><\/span>e) <\/b><\/span><\/span><\/span>1,03.10<\/b><\/span><\/span><\/span>-2<\/b><\/span><\/span><\/sup><\/span>\u00a0<\/b><\/span><\/span><\/span>\"\"<\/p>\n

09-(UFRGS)<\/b><\/span><\/span><\/span> <\/b>Dadas as <\/b><\/span><\/span><\/span>informa\u00e7\u00f5es: <\/b><\/span><\/span><\/span><\/p>\n

I.<\/b><\/span><\/span><\/span> <\/b>Velocidade da luz no v\u00e1cuo: <\/b><\/span><\/span><\/span>300000000 m\/s <\/b><\/span><\/span><\/span><\/p>\n

II.<\/b><\/span><\/span><\/span> <\/b>Dist\u00e2ncia da Terra ao Sol: <\/b><\/span><\/span><\/span>149000000 km<\/b><\/span><\/span><\/span><\/p>\n

III.<\/b><\/span><\/span><\/span> <\/b>Raio do \u00e1tomo de hidrog\u00eanio: <\/b><\/span><\/span><\/span>0,000000005 cm <\/b><\/span><\/span><\/span><\/p>\n

IV.<\/b><\/span><\/span><\/span> <\/b>Idade das rochas mais antigas: <\/b><\/span><\/span><\/span>100000000000000000 s <\/b><\/span><\/span><\/span><\/p>\n

Escreva <\/b><\/span><\/span><\/span>cada um desses n\u00famerossob forma <\/b><\/span><\/span><\/span>de <\/b><\/span><\/span><\/span>nota\u00e7\u00e3o cient\u00edfica. <\/b><\/span><\/span><\/span><\/p>\n

10-(<\/span><\/span>UFRGS)<\/b><\/span><\/span><\/span> <\/b>Em <\/b><\/span><\/span><\/span>texto<\/b><\/span><\/span><\/span> publicado na Folha de S. Paulo, o f\u00edsico <\/b><\/span><\/span><\/span>Marcelo Gleiser <\/b><\/span><\/span><\/span>escreveu que <\/b><\/span><\/span><\/span>\u201c\u00e1tomos t\u00eam di\u00e2metros de aproximadamente um d\u00e9cimo de bilion\u00e9simo de metro\u201d. <\/b><\/span><\/span><\/span>Escrito em <\/b><\/span><\/span><\/span>pot\u00eancia<\/b><\/span><\/span><\/span> de <\/b><\/span><\/span><\/span>10, um d\u00e9cimo de bilion\u00e9simo <\/b><\/span><\/span><\/span>\u00e9 <\/b><\/span><\/span><\/span>\"\"<\/p>\n

(A) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>-8 <\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

(B) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>-9 <\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

(C) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>-10 <\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

(D) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>-11 <\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

(E) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>-12<\/b><\/span><\/span><\/sup><\/span><\/p>\n

11-(UFRRJ)<\/b><\/span><\/span><\/span> <\/b>Uma <\/b><\/span><\/span><\/span>determinada marca de autom\u00f3vel <\/b><\/span><\/span><\/span>possui um <\/b><\/span><\/span><\/span>tanque de gasolina<\/b><\/span><\/span><\/span> com <\/b><\/span><\/span><\/span>volume igual <\/b><\/span><\/span><\/span>a <\/b><\/span><\/span><\/span>54 litros.<\/b><\/span><\/span><\/span>\"\"<\/p>\n

O manual de apresenta\u00e7\u00e3o do veiculo informa que ele <\/b><\/span><\/span><\/span>pode percorrer 12 km com 1 litro. <\/b><\/span><\/span><\/span>Supondo que a informa\u00e7\u00f5es do fabricante sejam verdadeiras, a <\/b><\/span><\/span><\/span>ordem de grandeza da distancia, medida em metros, que o autom\u00f3vel pode percorrer, ap\u00f3s ter o tanque completamente cheio, sem precisar reabastecer,<\/b><\/span><\/span><\/span> \u00e9 de:<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>
\n<\/b><\/span><\/span><\/span>a) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>0<\/b><\/span><\/span><\/sup><\/span> <\/b>b) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b>c) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b>d) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sup><\/span> <\/b>e) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>6<\/b><\/span><\/span><\/sup><\/span>\u00a0<\/b><\/span><\/span><\/span>
\n<\/b><\/span><\/span><\/span><\/p>\n

12-(UFCE-CE)<\/b><\/span><\/span><\/span> <\/b>A <\/b><\/span><\/span><\/span>escala de volume dos organismos vivos varia, <\/b><\/span><\/span><\/span>entre uma <\/b><\/span><\/span><\/span>bact\u00e9ria e uma baleia,<\/b><\/span><\/span><\/span> de\u00a0<\/b><\/span><\/span><\/span>21<\/b><\/span><\/span><\/span>\"\"<\/p>\n

ordens\u00a0de grandeza. <\/b><\/span><\/span><\/span>Se o <\/b><\/span><\/span><\/span>volume de uma baleia \u00e9\u00a010<\/b><\/span><\/span><\/span>2 <\/b><\/span><\/span><\/sup><\/span>m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>,<\/b><\/span><\/span><\/span> o <\/b><\/span><\/span><\/span>volume <\/b><\/span><\/span><\/span>de uma <\/b><\/span><\/span><\/span>bact\u00e9ria <\/b><\/span><\/span><\/span>\u00e9:
\n<\/b><\/span><\/span><\/span>a) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>11<\/b><\/span><\/span><\/sup><\/span> m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0<\/b><\/span><\/span><\/span><\/p>\n

b)\u00a0<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>-19<\/b><\/span><\/span><\/sup><\/span> m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

c) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>1\/21<\/b><\/span><\/span><\/sup><\/span> m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

d)\u00a0<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>19<\/b><\/span><\/span><\/sup><\/span> m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

e)\u00a010<\/b><\/span><\/span><\/span>-11<\/b><\/span><\/span><\/sup><\/span> m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

13-\u00a0(UFPE-PE)<\/b><\/span><\/span> <\/b>Em um <\/b><\/span><\/span><\/span>hotel<\/b><\/span><\/span><\/span><\/a> com\u00a0200 apartamentos <\/b><\/span><\/span><\/span>o <\/b><\/span><\/span><\/span>consumo m\u00e9dio de \u00e1gua por apartamento \u00e9 de <\/b><\/span><\/span><\/span><\/p>\n

100 litros por dia. <\/b><\/span><\/span><\/span>Qual a <\/b><\/span><\/span><\/span>ordem de grandeza <\/b><\/span><\/span><\/span>do <\/b><\/span><\/span><\/span>volume<\/b><\/span><\/span><\/span> que <\/b><\/span><\/span><\/span>deve ter o reservat\u00f3rio do hotel<\/b><\/span><\/span><\/span>, em <\/b><\/span><\/span><\/span>metros c\u00fabicos,<\/b><\/span><\/span><\/span> para <\/b><\/span><\/span><\/span>abastecer todos os apartamentos durante um dia?<\/b><\/span><\/span><\/span>
\n<\/b><\/span><\/span><\/span>a)\u00a0<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sup><\/span>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span>\"\"<\/p>\n

b)\u00a0<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>\u00a0\u00a0\u00a0\u00a0 <\/b><\/span><\/span><\/span><\/p>\n

c)\u00a0<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span><\/p>\n

d)\u00a0<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>4<\/b><\/span><\/span><\/sup><\/span>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0<\/b><\/span><\/span><\/span><\/p>\n

e)\u00a0<\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sup><\/span><\/p>\n

14-(UFF-RJ)<\/b><\/span><\/span><\/span> <\/b>A <\/b><\/span><\/span><\/span>luz proveniente do Sol demora, <\/b><\/span><\/span><\/span>aproximadamente, <\/b><\/span><\/span><\/span>8 minutos para chegar \u00e0 Terra.<\/b><\/span><\/span><\/span>\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>ordem de grandeza da distancia <\/b><\/span><\/span><\/span>entre <\/b><\/span><\/span><\/span>estes dois astros celestes, em km, <\/b><\/span><\/span><\/span>\u00e9:<\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>3 <\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

b) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>6<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

c) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>8 <\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

d) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>10 <\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

e) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>23<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

15-(CEFET-SP)<\/b><\/span><\/span><\/span> <\/b>Uma <\/b><\/span><\/span><\/span>pessoa percebeu que, durante 10 anos,<\/b><\/span><\/span><\/span> para <\/b><\/span><\/span><\/span>acender<\/b><\/span><\/span><\/span> o seu <\/b><\/span><\/span><\/span>aquecedor,<\/b><\/span><\/span><\/span> consumiu<\/b><\/span><\/span><\/span><\/p>\n

uma caixa de palitos de f\u00f3sforo a cada m\u00eas. Cada caixa <\/b><\/span><\/span><\/span>apresenta, em m\u00e9dia, <\/b><\/span><\/span><\/span>40 palitos. <\/b><\/span><\/span><\/span>\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>ordem de grandeza do n\u00famero de palitos consumidos ao final dos 10 anos<\/b><\/span><\/span><\/span> \u00e9:<\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>10 <\/b><\/span><\/span><\/span><\/p>\n

b) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

c) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

d) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>4 <\/b><\/span><\/span><\/sup><\/span><\/p>\n

e) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sup><\/span><\/p>\n

16-(UFRRJ)<\/b><\/span><\/span><\/span> <\/b>Uma <\/b><\/span><\/span><\/span>determinada marca de autom\u00f3vel <\/b><\/span><\/span><\/span>possui um <\/b><\/span><\/span><\/span>tanque de gasolina<\/b><\/span><\/span><\/span> com <\/b><\/span><\/span><\/span>volume igual <\/b><\/span><\/span><\/span>a <\/b><\/span><\/span><\/span>54 litros.<\/b><\/span><\/span><\/span>\"\"<\/p>\n

O manual de apresenta\u00e7\u00e3o do veiculo informa que ele <\/b><\/span><\/span><\/span>pode percorrer 12 km com 1 litro. <\/b><\/span><\/span><\/span>Supondo que a informa\u00e7\u00f5es do fabricante sejam verdadeiras, a <\/b><\/span><\/span><\/span>ordem de grandeza da distancia, medida em metros, que o autom\u00f3vel pode percorrer, ap\u00f3s ter o tanque completamente cheio, sem precisar reabastecer,<\/b><\/span><\/span><\/span> \u00e9 de:<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>
\n<\/b><\/span><\/span><\/span>a) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>0<\/b><\/span><\/span><\/sup><\/span> <\/b>b) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b>c) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b>d) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sup><\/span> <\/b>e) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>6<\/b><\/span><\/span><\/sup><\/span>\u00a0<\/b><\/span><\/span><\/span>
\n<\/b><\/span><\/span><\/span><\/p>\n


\n<\/b><\/span><\/span><\/span>17-(UFRRJ)<\/b><\/span><\/span><\/span> <\/b>Leia atentamente <\/b><\/span><\/span><\/span>o quadrinho a seguir. Com <\/b><\/span><\/span><\/span>base no relat\u00f3rio do gari, <\/b><\/span><\/span><\/span>calcule a <\/b><\/span><\/span><\/span>ordem<\/b><\/span><\/span><\/span><\/p>\n

de grandeza do somat\u00f3rio do n\u00famero de folhas de \u00e1rvores e de pontas de cigarros que ele recolheu.<\/b><\/span><\/span><\/span>\"\"<\/p>\n

a) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span><\/p>\n

b) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>4<\/b><\/span><\/span><\/sup><\/span><\/p>\n

c) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sup><\/span><\/p>\n

d) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>7<\/b><\/span><\/span><\/sup><\/span><\/p>\n

e) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>8<\/b><\/span><\/span><\/sup><\/span><\/p>\n

18-(UFPE-PE)<\/b><\/span><\/span><\/span> <\/b>O <\/b><\/span><\/span><\/span>fluxo total de sangue na grande circula\u00e7\u00e3o<\/b><\/span><\/span><\/span>, tamb\u00e9m chamado de <\/b><\/span><\/span><\/span>d\u00e9bito card\u00edaco, <\/b><\/span><\/span><\/span>faz com que o <\/b><\/span><\/span><\/span>cora\u00e7\u00e3o <\/b><\/span><\/span><\/span>de um <\/b><\/span><\/span><\/span>homem adulto <\/b><\/span><\/span><\/span>seja respons\u00e1vel pelo <\/b><\/span><\/span><\/span>bombeamento, em m\u00e9dia, de 20 litros por minuto. <\/b><\/span><\/span><\/span>\"\"<\/p>\n

Qual a <\/b><\/span><\/span><\/span>ordem de grandeza do volume de sangue<\/b><\/span><\/span><\/span>, em <\/b><\/span><\/span><\/span>litros,<\/b><\/span><\/span><\/span> <\/b>bombeados pelo cora\u00e7\u00e3o em um dia?<\/b><\/span><\/span><\/span><\/p>\n

a) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

b) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

c) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>4<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

d) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

e) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>6<\/b><\/span><\/span><\/sup><\/span><\/p>\n

19-(<\/span><\/span>UFJF- MG)<\/b><\/span><\/span><\/span> Supondo-se <\/b><\/span><\/span><\/span>que um <\/b><\/span><\/span><\/span>gr\u00e3o de feij\u00e3o <\/b><\/span><\/span><\/span>ocupe o <\/b><\/span><\/span><\/span>espa\u00e7o equivalente <\/b><\/span><\/span><\/span>a um <\/b><\/span><\/span><\/span>paralelep\u00edpedo <\/b><\/span><\/span><\/span> <\/b><\/p>\n

de <\/b><\/span><\/span><\/span>arestas 0,5cm, 0,5cm e 1,0cm, <\/b><\/span><\/span><\/span>qual das <\/b><\/span><\/span><\/span>alternativas abaixo <\/b><\/span><\/span><\/span>melhor estima \u00e0 <\/b><\/span><\/span><\/span>ordem de grandeza do n\u00famero de feij\u00f5es contido no volume de um litro?<\/b><\/span><\/span><\/span>\"\"<\/p>\n

a) <\/b><\/span><\/span><\/span>10 <\/b><\/span><\/span><\/span><\/p>\n

b) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

c) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

d) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>4<\/b><\/span><\/span><\/sup><\/span> <\/b><\/p>\n

e) <\/b><\/span><\/span><\/span>10<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sup><\/span><\/p>\n

20-(<\/span><\/span><\/span>ENEM-MEC)<\/b><\/span><\/span><\/span> <\/b>A <\/b><\/span><\/span><\/span>cor de uma estrela<\/b><\/span><\/span><\/span> tem rela\u00e7\u00e3o com a <\/b><\/span><\/span><\/span>temperatura em sua superf\u00edcie. <\/b><\/span><\/span><\/span><\/p>\n

Estrelas n\u00e3o muito quentes <\/b><\/span><\/span><\/span>(cerca\u00a0de 3 000 K) <\/b><\/span><\/span><\/span>nos parecem avermelhadas. <\/b><\/span><\/span><\/span>J\u00e1 as <\/b><\/span><\/span><\/span>estrelas amarelas<\/b><\/span><\/span><\/span>, como o Sol, <\/b><\/span><\/span><\/span>possuem temperatura em torno\u00a0dos 6 000 K; <\/b><\/span><\/span><\/span>as <\/b><\/span><\/span><\/span>mais quentes s\u00e3o brancas ou azuis porque sua temperatura fica acima dos 10 000 K.<\/b><\/span><\/span><\/span><\/p>\n

A <\/b><\/span><\/span><\/span>tabela apresenta uma classifica\u00e7\u00e3o espectral <\/b><\/span><\/span><\/span>e outros dados <\/b><\/span><\/span><\/span>para as estrelas dessas classes.<\/b><\/span><\/span><\/span><\/p>\n

\"\"\"\"<\/p>\n

Se <\/b><\/span><\/span><\/span>tomarmos uma estrela que tenha temperatura 5 vezes maior que a temperatura do Sol, <\/b><\/span><\/span><\/span>qual ser\u00e1 a <\/b><\/span><\/span><\/span>ordem\u00a0de grandeza de sua luminosidade?<\/b><\/span><\/span><\/span><\/p>\n

A- <\/b><\/span><\/span><\/span>20 000 vezes a luminosidade do Sol.<\/b><\/span><\/span><\/span><\/p>\n

B- <\/b><\/span><\/span><\/span>28 000 vezes a luminosidade do Sol.<\/b><\/span><\/span><\/span><\/p>\n

C- <\/b><\/span><\/span><\/span>28 850 vezes a luminosidade do Sol.<\/b><\/span><\/span><\/span><\/p>\n

D- <\/b><\/span><\/span><\/span>30 000 vezes a luminosidade do Sol.<\/b><\/span><\/span><\/span><\/p>\n

E- <\/b><\/span><\/span><\/span>50 000 vezes a luminosidade <\/b><\/span><\/span><\/span>do Sol.<\/b><\/span><\/span><\/span><\/p>\n

 <\/p>\n

Confira a resolu\u00e7\u00e3o comentada dos exerc\u00edcios<\/span><\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"

Exerc\u00edcios de vestibulares com resolu\u00e7\u00f5es comentadas sobre Nota\u00e7\u00e3o Cient\u00edfica, Ordem de Grandeza e Algarismos Significativos 01-(Unioeste-PR) Com base na teoria dos algarismos significativos, com a utiliza\u00e7\u00e3o da r\u00e9gua centimetrada (figura), \u00e9 correto afirmar que o comprimento da barra acima da r\u00e9gua \u00e9: a) 7,30 cm. b) 7,35 cm. c) 7,3 cm d) 73,0 mm. e) 7, 40 cm. 02-(Cefet-PE) A<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2497,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-2499","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/2499","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/comments?post=2499"}],"version-history":[{"count":3,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/2499\/revisions"}],"predecessor-version":[{"id":10780,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/2499\/revisions\/10780"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/2497"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=2499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}