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marta [7]
2 years ago
10

How much electrical energy is used by a 400 W toaster that is operating for 5

Physics
1 answer:
andrew11 [14]2 years ago
8 0

Answer:

The answer is C. 120,000 J.

Explanation:

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The height of the Washington Monument is measured to be 170 m on a day when its temperature is 35.0°C. What will the change in i
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Answer:

The deformation is 0.088289 m

The final height of the monument is 170-0.088289 = 169.911702 m

Explanation:

Thermal coefficient of marble varies between (5.5 - 14.1) ×10⁻⁶/K = α

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(5.5+14.1)/2 = 9.8×10⁻⁶ /K

Change in temperature = 35-(-18) = 53 K = ΔT

Original length = 170 m = L

Linear thermal expansion

\frac{\Delta L}{L} = \alpha\Delta T\\\Rightarrow \Delta L=\frac{\alpha\Delta T}{L}\\\Rightarrow \Delta L=9.8\times 10^{-6}\times 53\times 170

The deformation is 0.088289 m

The final height of the monument is 170-0.088289 = 169.911702 m (subtraction because of cooling)

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Explanation:

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