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shtirl [24]
3 years ago
15

I need help with these questions thank u

Physics
1 answer:
strojnjashka [21]3 years ago
8 0

Answer:

need the points my bad bro

Explanation:

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How large an expansion gap should be left between steel railroad rails if they may reach a maximum temperature 30.0°C greater th
irina [24]

Answer:

<em>1.2 cm</em>

Explanation:

<u>Thermal Expansion</u>

It's the tendency that materials have to change its size and/or shape under changes of temperature. It can be in one (linear), two (surface) or three (volume) dimensions.

The formula to compute the expansion of a material under a change of temperature from T_o to T_f is given by.

\Delta L=L_o.\alpha .(T_f-T_o)

Where Lo is the initial length and \alpha is the linear temperature expansion coefficient, which value is specific for each material. The data provided in the problem is as follows:

L_o=30\ m,\ T_f-T_o=30^oC,\ \alpha=13\times 10^{-6}\ ^oC^{-1}

Computing the expansion we have

\Delta L=30\times 13\times 10^{-6}(30)=0.0117=1.17\ cm

The expansion gap should be approximately 1.2 cm

6 0
3 years ago
How are Earth and Venus similar? How is Venus different from Earth? (Provide two similarities and two differences.)
Alika [10]
Venus shares a similar size, surface composition, and has an atmosphere with a complex weather system. Venus is different from Earth because it spins the opposite direction of Earth and it’s rotation is very slow.
8 0
3 years ago
Describe why it was possible for a paperclip to ‘float’ on water
vesna_86 [32]

Answer:

because it weighs more than water

8 0
4 years ago
On August 10, 1972, a large meteorite skipped across the atmosphere above the western United States and western Canada, much lik
sweet [91]

Answer:

A. 3.38 x 10^14 J.

B. 0.08 megaton of TNT.

C. 6 bombs.

Below is an attachment containing the solution to the question.

6 0
3 years ago
Chloe read an essay that claims the body and mind, which are made up of different substances, interact both harmoniously and com
ludmilkaskok [199]

Answer:

René Descartes

Explanation:

https://quizlet.com/172472862/psychologys-early-history-flash-cards/

3 0
3 years ago
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