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Hello!
The steel cranes lifting thousands of feet high during skyscraper construction is an example of the evolution of building techniques.
I hope it helps!
Answer:
7.05*10^16(when wavelength =4.25*10^-9m)
Explanation:
c=wavelength *frequency (f)
i.e. f=c/wavelength =3*10^8/4.25*10^-9=7.05*10^16
Answer:
Balanced chemical equation:
C₃H₈ + 5O₂ → 4H₂O + 3CO₂
Explanation:
Chemical equation:
C₃H₈ + O₂ → H₂O + CO₂
Balanced chemical equation:
C₃H₈ + 5O₂ → 4H₂O + 3CO₂
1st step:
Left side Right side
C = 3 C = 1
H = 8 H = 2
O = 2 O = 3
2nd step:
C₃H₈ + O₂ → H₂O + 3CO₂
Left side Right side
C = 3 C = 1×3 = 3
H = 8 H = 2
O = 2 O = 6+1 = 7
3rd step:
C₃H₈ + O₂ → 4H₂O + 3CO₂
Left side Right side
C = 3 C = 1×3 = 3
H = 8 H = 2×4 = 8
O = 2 O = 6+4 = 10
4th step:
C₃H₈ + 5O₂ → 4H₂O + 3CO₂
Left side Right side
C = 3 C = 1×3 = 3
H = 8 H = 2×4 = 8
O = 2×5= 10 O = 6+4 = 10