How is an elliptical galaxy different from a spiral galaxy?
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Answer:
You are asked to design a cylindrical steel rod 50.0 cm long, with a circular cross section, that will conduct 170.0 J/s from a furnace at 350.0 ∘C to a container of boiling water under 1 atmosphere.
Explanation:
Given Values:
L = 50 cm = 0.5 m
H = 170 j/s
To find the diameter of the rod, we have to find the area of the rod using the following formula.
Here Tc = 100.0° C
k = 50.2
H = k × A ×
Solving for A
A =
A =
A = = 6.77 ×
m²
Now Area of cylinder is :
A = d²
solving for d:
d =
d = 9.28 cm
The steel would expand by 4. 8 * 10^-3 cm
<h3>How to determine the linear expansion</h3>The change in length ΔL is proportional to length L. It is dependent on the temperature, substance, and length.
Using the formula:
ΔL= α LΔT
where ΔL is the change in length L = 10cm
ΔT is the change in temperature = 60° - 20° = 40° C
α is the coefficient of linear expansion = 1.2 x 10^-5 °C
Substitute into the formula
ΔL =
ΔL = cm
Therefore, the steel would expand by 4. 8 * 10^-3 cm
Learn more about linear expansion here:
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