Груз массой 60кг подняли с помощью неподвижного блока.Какой КПД блока,если приложенная сила равнялась 750Н?

1. Does the environment belong principally to the human race?

2. Do your consumption habits destroy the habitats of other species?

3. Do you think that developers should be permitted to build big hotels and tourist complexes in the most beautiful places in your country?

4. Should the private motorist be made to pay more heavily through higher road tax, petrol prices, parking fees and motorway tolls?

5. Should cars be banned from city, town and village centres?

6. Are you for or against nuclear power?

7. Does your country need stricter laws to punish noisy neighbours or discos which play loud music late at night?

8. Are your country's seas, rivers and / or lakes clean to swim in?

9. What government and private campaigns are there in your country to protect and improve the environment? Are these campaigns motivated by concern for the lives and habitats of species other than our own?

Ответьте на вопросы. Можно кратко:)

1)роль эндокринной системы?

2)состояние соматической системы?

3)состояние вегетативной системы

4)состояние эндокринной системы

Решить систему:

ху=-12

(х-2)*(у-4)=-8