Biofísica UBA XXI Examen formativo - Indice

Biofísica UBA XXI 

Examen formativo

1. Jun 2020

1.1. Mecánica

1.1.1. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-4.html

1.1.2. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-14.html

1.1.3. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-15.html

1.1.4. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-18.html

1.1.5. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-20.html

1.1.6. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-26.html

1.1.7. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-27.html

1.1.8. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-29.html

1.1.9. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-47.html

1.1.10. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-52.html

1.1.11. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-57.html

1.1.12. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-59.html

1.1.13. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-65.html

1.1.14. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-66.html

1.1.15. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-67.html

1.1.16. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-72.html

1.2. Fluidos

1.2.1. http://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-1.html

1.2.2. http://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-2.html

1.2.3. http://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-3.html

1.2.4. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-6.html

1.2.5. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-7.html

1.2.6. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-9.html

1.2.7. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-12.html

1.2.8. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-13.html

1.2.9. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-16.html

1.2.10. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-17.html

1.2.11. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-21.html

1.2.12. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-22.html

1.2.13. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-23.html

1.2.14. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-24.html

1.2.15. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-31.html

1.2.16. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-34.html

1.2.17. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-36.html

1.2.18. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-37.html

1.2.19. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-39.html

1.2.20. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-40.html

1.2.21. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-41.html

1.2.22. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-42.html

1.2.23. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-48.html

1.2.24. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-49.html

1.2.25. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-50.html

1.2.26. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-51.html

1.2.27. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-54.html

1.2.28. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-56.html

1.2.29. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-58.html

1.2.30. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-61.html

1.2.31. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-62.html

1.2.32. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-63.html

1.2.33. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-64.html

1.3. Termodinámica

1.3.1. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-5.html

1.3.2. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-8.html

1.3.3. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-10.html

1.3.4. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-11.html

1.3.5. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-19.html

1.3.6. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-25.html

1.3.7. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-28.html

1.3.8. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-30.html

1.3.9. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-32.html

1.3.10. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-33.html

1.3.11. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-35.html

1.3.12. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-38.html

1.3.13. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-43.html

1.3.14. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-44.html

1.3.15. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-45.html

1.3.16. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-46.html

1.3.17. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-53.html

1.3.18. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-55.html

1.3.19. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-60.html

1.3.20. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-68.html

1.3.21. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-69.html

1.3.22. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-70.html

1.3.23. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-71.html

1.3.24. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jun-20-73.html

2. Julio 2020

2.1. Físicoquímica (fenómenos de transporte)

2.1.1. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-1.html

2.1.2. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-3.html

2.1.3. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-5.html

2.1.4. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-7.html

2.1.5. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-9.html

2.1.6. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-12.html

2.1.7. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-14.html

2.1.8. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-16.html

2.1.9. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-17.html

2.1.10. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-20.html

2.1.11. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-24.html

2.1.12. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-26.html

2.1.13. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-28.html

2.1.14. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-29.html

2.1.15. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-32.html

2.1.16. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-33.html

2.1.17. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-34.html

2.1.18. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-40.html

2.1.19. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-41.html

2.1.20. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-45.html

2.1.21. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-46.html

2.1.22. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-47.html

2.1.23. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-48.html

2.1.24. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-55.html

2.1.25. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-57.html

2.1.26. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-60.html

2.1.27. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-61.html

2.1.28. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-63.html

2.1.29. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-65.html

2.1.30. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-68.html

2.1.31. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-71.html

2.1.32. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-74.html

2.1.33. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-75.html

2.1.34. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-76.html

2.1.35. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-81.html

2.1.36. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-82.html

2.1.37. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-83.html

2.1.38. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-86.html

2.1.39. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-87.html

2.1.40. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-89.html

2.2. Electricidad

2.2.1. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-8.html

2.2.2. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-15.html

2.2.3. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-18.html

2.2.4. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-21.html

2.2.5. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-23.html

2.2.6. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-30.html

2.2.7. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-31.html

2.2.8. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-35.html

2.2.9. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-38.html

2.2.10. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-43.html

2.2.11. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-49.html

2.2.12. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-52.html

2.2.13. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-53.html

2.2.14. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-64.html

2.2.15 https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-66.html

2.2.16. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-70.html

2.2.17. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-77.html

2.2.18. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-80.html

2.2.19. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-88.html

2.3. Ondas (luz y sonido)

2.3.1. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-2-ondas.html

2.3.2. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-4-ondas.html

2.3.3. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-6-ondas.html

2.3.4. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-10-ondas.html

2.3.5. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-11-ondas.html

2.3.6. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-13-ondas.html

2.3.7. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-19-ondas.html

2.3.8. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-22-ondas.html

2.3.9. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-25-ondas.html

2.3.10. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-27-ondas.html

2.3.11. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-36-ondas.html

2.3.12. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-37-ondas.html

2.3.13. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-39-ondas.html

2.3.14. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-42-ondas.html

2.3.15. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-44-ondas.html

2.3.16. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-50-ondas.html

2.3.17. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-51-ondas.html

2.3.18. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-54-ondas.html

2.3.19. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-56-ondas.html

2.3.20. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-58-ondas.html

2.3.21. https://noemifisica.blogspot.com/2020/07/biofisica-uba-xxi-examen-jul-20-59-ondas.html

2.3.22. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-62-ondas.html

2.3.23. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-67-ondas.html

2.3.24. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-69-ondas.html

2.3.25. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-72-ondas.html

2.3.26. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-73-ondas.html

2.3.27. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-78-ondas.html

2.3.28. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-79-ondas.html

2.3.29. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-84-ondas.html

2.3.30. https://noemifisica.blogspot.com/2020/08/biofisica-uba-xxi-examen-jul-20-85-ondas.html

3. Octubre 2020

3.1. Mecánica

3.1.1. https://noemifisica.blogspot.com/2020/10/biofisica-uba-xxi-examen-sep-20-2.html

3.1.2. http://noemifisica.blogspot.com/2020/10/biofisica-uba-xxi-examen-sep-20-6.html 

3.2. Fluidos

3.2.1. https://noemifisica.blogspot.com/2020/10/biofisica-uba-xxi-examen-sep-20-3.html

3.2.2. https://noemifisica.blogspot.com/2020/10/biofisica-uba-xxi-examen-sep-20-4.html

3.3. Termodinámica

3.3.1. https://noemifisica.blogspot.com/2020/10/biofisica-uba-xxi-examen-sep-20-1.html

3.3.2. https://noemifisica.blogspot.com/2020/10/biofisica-uba-xxi-examen-sep-20-5.html

Indice 

https://noemifisica.blogspot.com/2022/05/biofisica-uba-xxi-indice.html

Biofísica UBA XXI Examen jun 20 3. Fluidos

3. En una cámara frigorífica de 3000 mm de alto, 5 m de largo, y 0,35 hm de ancho se midió la humedad relativa en 3 días diferentes del año, denominados A, B y C. En el día A la temperatura ambiente fué de 20°C;  en el día B fue de 270K y en el día C fue de 12°C. Seleccione la opción correcta considerando q se ordenan de menor a mayor los días según su humedad relativa   seleccione la opción correcta considerando que se ordenan de menor a mayor los días según su humedad relativa

 a) B< C < A

█ b) A < C < B

 c) B < A < C

 d) A< B < C

 e) C < B < A

Humedad relativa = Masa de vapor / Masa de vapor saturado

Masa de vapor de la cámara = constante

Masa de vapor saturado = aumenta con la temperatura

Temperatura aumenta ----------- Masa de vapor saturado aumenta ----------  humedad relativa disminuye

TA = 20 ºC

TB = 270 K – 273 = - 3 ºC

TC = 12 ºC

TB < TC < TA ------------------ A < C < B

Biofísica UBA XXI Examen jun 20 2. Fluidos

2. Según la Ley de Poiseullie aplicada al lecho circulatorio si un animal cursa un cuadro de hipotermia ( disminución de la temperatura corporal) , indique la opción que considere correcta :

R = 8 π η L/ S² ( Ley de Poiseullie)

donde

R = resistencia periférica total

η = coeficiente de viscosidad

L = longitud

S = sección

 a) la resistencia periférica total disminuye porque aumenta la viscosidad de la sangre

Falso

η aumenta  ------------- R aumenta

 b) la resistencia periférica total aumenta porque disminuye la viscosidad de la sangre

Falso

η disminuye  ------------- R disminuye

 c) la resistencia periférica total disminuye porque aumenta la viscosidad de la sangre

Falso

η aumenta  ------------- R aumenta

█ d) la resistencia periférica total aumenta porque aumenta la viscosidad de la sangre.

Verdadero

T disminuye (hipotermia) ---------- η aumenta  ------------- R aumenta

 e) la resistencia periférica total no se modifica

Falso

η aumenta  ------------- R aumenta ------------ R se modifica

Biofísica UBA XXI Examen jun 20 1. Fluidos

1. Calcule la diferencia d presión entre los 2 extremos de un sorbete de 15 cm de largo y 0,8 cm de diámetro , que se usa para tomar agua a una velocidad de 5cm/s. Dato: η = 1Cp.

 a. 0,37 barias

█ b. 37,5 barias

 c. 9,3 barias

 d. 0,037 barias

 e. 0,093 barias

ΔP = R Q

Donde

ΔP = variación de presión

R = resistencia hidrodinámica =  8 π η L/ S² ( Ley de Poiseullie)

η = coeficiente de viscosidad = 1 cp = 0,01 bar.s

L = longitud del tubo = 15 cm

S = sección del tubo = π r²

r = radio = diámetro/2 = 0,8 cm / 2 = 0,4 cm

Q = caudal = v S

v = velocidad = 5 cm/s

S = sección del tubo = π r²

Reemplazando

ΔP = 8 π η L/ S² v S = 8 π η L v / (π r²)  = 8 * 0,01 bar .s 15 cm 5 cm/s / (0,4 cm)² = 37,5 barias