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tresset_1 [31]
3 years ago
11

Please help, very confused!

Physics
2 answers:
PtichkaEL [24]3 years ago
4 0
D. the last choice because the info above tells u so
e-lub [12.9K]3 years ago
3 0

Answer: D The number of wavelengths per unit time will not change as a light wave moves from a solid into a liquid.

As told in the question frequency remains unaltered when crossing a medium boundary. Frequency is the number of wavelengths per unit time. So, frequency will not change when light wave moves from solid into a liquid.

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The Eiffel Tower is a steel structure whose height increases by 19.4 cm when the temperature changes from -9 to 41 oC. What is t
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Answer:

Initial height L = 323.3m

Explanation:

Given:

Change in Length ∆L = 19.4cm 0.194m

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Using the formula for linear expansion:

∆L = Lk∆T

L = ∆L/k∆T ....1

Substituting the given values into equation 1

L = 0.194/(12 × 10^-6 × 50)

Initial height L = 323.3m

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Answer:

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