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stealth61 [152]
2 years ago
9

Maria is comparing data from an investigation about the melting point of ice. Based on her research, she knows ice

Physics
2 answers:
erica [24]2 years ago
8 0

Answer:

The answer Is set 4.

Explanation

eduard2 years ago
5 0

Answer:

set 2

Explanation:

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Diamond is the hardest naturally occurring substance found on Earth. 
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An iron railroad rail is 800 ft long when the temperature is 31°C. What is its length (in ft) when the temperature is −17°C?
natta225 [31]

Answer:

799.54 ft

Explanation:

Linear thermal expansion is:

ΔL = α L₀ ΔT

where ΔL is the change in length,

α is the linear thermal expansion coefficient,

L₀ is the original length,

and ΔT is the change in temperature.

Given:

α = 1.2×10⁻⁵ / °C

L₀ = 800 ft

ΔT = -17°C − 31°C = -48°C

Find: ΔL

ΔL = (1.2×10⁻⁵ / °C) (800 ft) (-48°C)

ΔL = -0.4608

Rounded to two significant figures, the change in length is -0.46 ft.

Therefore, the final length is approximately 800 ft − 0.46 ft = 799.54 ft.

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3 years ago
About how much of the United States' electricity is produced by nuclear reactors?​
Firdavs [7]

Answer:

19% total electrical output

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2 years ago
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A straight railroad track is being built to connect two cities. the measured distance of the track between the two cities is 160
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Let point A be 0.0 miles (first city)
Let point B be 160.5 miles (first city to second city)
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Take C – A = C [28.5 - 0.0 = 28.5] (This checks the distance between city 1 and Mail stop) 

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