Aceasta prezentare PPT face referire la următoarele:
- legea atracţiei universale
- câmpul gravitaţional
- intensitatea câmpului gravitaţional
- acceleraţia gravitaţională
- prima viteză cosmică
Aceasta prezentare PPT face referire la următoarele:
- legea atracţiei universale
- câmpul gravitaţional
- intensitatea câmpului gravitaţional
- acceleraţia gravitaţională
- prima viteză cosmică
Petrol si carbuni de 9n slife uri e inspDaria561699
e inspirat din manual dar are cele emai bune informatii din lume , SA IMI STERGETI NUMELE asa si sa tii dati va rog frumois cel mai tare review din istorie ok?? haahahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
11. Chimizarea petrolului se poate face prin: - procedee fizice: distilarea sub presiune si distilarea sub vid; - procedee chimice: cracare catalitica, la ≈440C; cracare la temperatura ridicata (≈800C); reformare catalitica. Cu exceptia fractiei >C20, toate celelalte fractii petroliere sunt transformate in benzine de calitate superioara. Toate fractiile petroliere sunt transformate in compusi care sunt la randul lor materii prime pentru diferite ramuri industriale .
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