To solve this problem it is necessary to apply the concepts related to thermal linear expansion. Mathematically this concept can be expressed under the Equation:

$\Delta L = L_0 \alpha \Delta T$

Where,

$L_0 =$ Initial Length

$\alpha =$ Thermal Expanssion constant

$\Delta T =$ Change in Lenght

Our values are given as

$L_0 = 2.99m$

$\alpha = 5.50*10^{-7} ( \∘C )^{-1}$

$\Delta T = T_2-T_1 = 213-20$

Replacing at our equation we have,

$\Delta L = L_0 \alpha \Delta T$

$\Delta L = (2.99) (5.5 x 10^{-7}) (213 - 20)$

$\Delta L = 0.317*10^{-3}m\approx 0.317mm$

Therefore the expantion of the bar is 0.317mm

7 0

4 years ago

How does the thickness of a planets atmosphere affect a planets average temperature

scZoUnD [109]

Answer:

Hey

The thickness of a planet's atmosphere determines the tempature. the reason why is because gas traps or reflects light. Gass molecules generally reflect light which means that photons bounce of gass molecules. But the space between these molecules allows most of the light to travel through and hit the planet.

4 0

3 years ago

Am example of a mechanical wave is?

Bogdan [553]

An example of a mechanical wave is a sound wave

3 0

4 years ago