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Morgarella [4.7K]
3 years ago
9

Which of the following is the best definition of energy?

Physics
1 answer:
Montano1993 [528]3 years ago
8 0
Energy is the capacity to do some type of work
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Calculate the change in length of a 90.5 mm aluminum bar that has increased in temperature by from -14.4 oC to 154.6 oC
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Answer:

 ΔL = 3.82 10⁻⁴ m

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This is a thermal expansion exercise

          ΔL = α L₀ ΔT

          ΔT = T_f - T₀

where ΔL is the change in length and ΔT is the change in temperature

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let's calculate

          ΔL = 25.10⁻⁶ 0.0905 (154.6 - (14.4))

          ΔL = 3.8236 10⁻⁴ m

     

using the criterion of three significant figures

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