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SashulF [63]
3 years ago
5

The coefficient of linear expansion of steel is 12 × 10-6 K-1 . What is the change in length of a 25-m steel bridge span when it

undergoes a temperature change of 40 K from winter to Summer?
Physics
1 answer:
Westkost [7]3 years ago
4 0

Answer:

0.012-m

Explanation:

∆L = α × Lo × (T-To)

α is the coefficient of linear expansion = 12 × 10-6 K-1

Lo = Initial length = 25-m

∆L = Change in length

(T-To) = 40 K

∆L = 12 × 10-6 × 25 × 40

∆L = 0.012-m

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A force of 35 N acts on a ball for 0.2 s. If the ball is initially at rest:
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Answer:

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Part a)

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