Предмет: Физика, автор: islamdin90

Что больше и во сколько раз для двух электронов: сила их электростатического или гравитационного взаимодействия? При какой массе электронов эти силы смогли бы уравновесить друг друга? 

Ответы

Автор ответа: Аноним
0
гравитационного взаимодействия F1 = G m^2 /r^2
электростатического взаимодействия F2 = k q^2/r^2
F2/F1 = k q^2/r^2 / G m^2 /r^2  =  k q^2  /G m^2  = k/G * (q/m)^2  =
          =  8.9 *10^9  / 6.67*10^-11 * ( 1.6*10^-19 /9.1*10^-31  )^2  =
            =  4.12 * 10^42  раза  БОЛЬШЕ сила электр. взаимодействия F2 
Похожие вопросы
Предмет: Английский язык, автор: nazarova2004alena
СРОЧНО даю 40 баллов
2. Доберіть потрібну форму дієслова.
1. I ….. never ….. late for school.
a) had***been; b) have***been; c) was***been; d) shall have***been.
2. By next winter they ….. four houses in this field.
a) have built; b) will build; c) will have built; d) build.
3. Hey! Somebody ….. my coffee! My cup was full.
a) drink; b) had drunk; c) drank; d) has drunk.
4. By this time next year I ….. 250 $.
a) shall have; b) have saved; c) shall have saved; d) saved.
5. She went to the post-office after she ….. the letter.
a) writes; b) has written; c) wrote; d) had written.
6. She ….. to Italy five years ago.
a) has gone; b) went; c) had gone; d) goes.
7. It ….. to rain before she took a taxi.
a) had begun; b) has begin; c) began; d) begins.
8. ….. you ever ….. any serious illness ?
a)had***had; b) had***have; c) have***had; d) has***had.
9. He went to the cinema after he ….. his dinner.
a) had had; b) has had; c) had; d) will have.
10. The train ….. before we reach the station.
a) will leave; b) will have left; c) have left; d) leaves.
11. When I ….. my seat-belt, the plane took off.
a) had fastened; b) have fastened; c) fastened; d) fasten.
12. The lecture ….. just …..
a) has***begin; b) will have***begin; c) has***begun;
d) had***begun.
13. We ….. our work by 6 yesterday.
a) had finished; b) finished; c) have finished; d) finish.
14. By the end of the term Tom ….. all twelve volumes.
a) shall have read; b) will read; c) will have read; d) has read.
Предмет: Математика, автор: aslanovdeniz36