Fisica

CÁLCULOS
ALUMINIO |
X | L0(cm) | T0(◦C) | TF(◦C) | L- <L> | To- <To> | Tf- <Tf> |
1 | 62.0 | 27 | 93.5 | 0.04 | 0.25 | 0 |
2 | 61.9| 27 | 93.0 | 0.06 | 0.25 | 0.5 |
3 | 61.95 | 26 | 94.0 | 0.01 | 0.75 | 0.5 |
4 | 62.0 | 27 | 93.5 | 0.04 | 0.25 | 0 |
<X> | 61.96 | 26.75 |93.5 | 0.0375 | 0.375 | 0.025 |

ΔL(aluminio)= 0.039 cm
N(Lo) = 16 x dLEE2= 0.09 ≅0.1≅1 LET(Lo) = 0 + 0.01
N(To) = 16 x dLEE2= 0.09 ≅0.1≅1 LET(To) = 0 +1
N(Tf) = 16 x dLEE2= 0.0004 ≅0 LET(Tf) = 0 + 1
ALUMINIO |
X | L0(cm) | T0(◦C) | TF(◦C) |
1 | 61.95 | 27 | 93.5 |

α = ΔLLo ΔT =2.33x10-5 °C-1

Δα= ∂α∂ΔL ΔL+ ∂α∂LoΔLo+ ∂α∂TΔT
Δα= 1LoΔ TΔL+ -Δ LΔ TLo2ΔLo+ Δ LLo(Δ T)2ΔT = 5.377x10-7℃-1

α = (2.33x10-5 ± 5.377x10-7 ) ℃-1
ΔL= (0.039 ±0.001) cm

COBRE |
X | L0(cm) | T0(◦C) | TF(◦C) | L- <L> | To- <To> | Tf- <Tf> |
1 | 61.0 | 25 | 94.0 | 0.09 | 0.25 | 0.1 |
2 |60.95 | 24 | 93.0 | 0.04 | 0.75 | 1.1 |
3 | 60.9 | 25 | 95.0 | 0.01 | 0.25 | 0.9 |
4 | 60.8 | 25 | 94.5 | 0.11 | 0.25 | 0.4 |
<X> | 60.91 | 24.75 |94.1 | 0.0625 | 0.375 | 0.625 |

ΔL(cobre)= 0.081 cm
N(Lo) = 16 x dLEE2= 0.25 ≅1 LET(Lo) = 0 + 0.01
N(To) = 16 x dLEE2= 0.09 ≅0.1≅1 LET(To) = 0 + 1N(Tf) = 16 x dLEE2= 0.25 ≅1 LET(Tf) = 0 + 1
COBRE |
X | L0(cm) | T0(◦C) | TF(◦C) |
1 | 60.9 | 25 | 94 |

α = ΔLLo ΔT = 1.93x10-5 ℃-1

Δα=∂α∂ΔL ΔL+ ∂α∂LoΔLo+ ∂α∂TΔT
Δα= 1LoΔ TΔL+ -Δ LΔ TLo2ΔLo+ Δ LLo(Δ T)2ΔT = 1.114x10-6 ℃-1

α = (1.93x10-5 ± 1.114x10-6 ) ℃-1
ΔL= (0.081 ± 0.001) cm