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miv72 [106K]
3 years ago
12

For calcutating kinetic energy what units do the mass and speed have to be ( k.e=1/2*m*v^2 )

Physics
1 answer:
kiruha [24]3 years ago
7 0

Answer:

mass is in kg and velocity is in m/s for the answer to be in Joules

Explanation:

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Answer:

<u>0.04 °C⁻¹</u>

Explanation:

First, we need to calculate linear expansivity, then after finding that value, we can move on to finding the area expansivity.

<u />

=============================================================

Finding Linear Expansivity :

⇒ α = Final length - Original length / (Original length × ΔT)

⇒ α = 9 - 4 / (4 × 70 - 20)

⇒ α = 5 / 5 × 50

⇒ α = <u>0.02</u>

============================================================

Finding Area Expansivity :

⇒ Area Expansivity = 2 × Linear Expansivity

⇒ β = 2 × α

⇒ β = 2 × 0.02

⇒ β = <u>0.04 °C⁻¹</u>

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