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soldi70 [24.7K]
3 years ago
9

Explain relationship between thermal conductivity and thermal behaviour of glass , plastic and wood.

Physics
2 answers:
stellarik [79]3 years ago
5 0

Thermal conductivity is a material property describing the ability to conduct heat. Thermal conductivity can be defined as

"the quantity of heat transmitted through a unit thickness of a material - in a direction normal to a surface of unit area - due to a unit temperature gradient under steady state condi<span>tions"</span>glass has the highest thermal conductivity compare to plastic and wood because it can transfer heat faster.This is followed by plastic and wood. Wood has the lowest thermal conductivity but is good to be a heat insulator. wood transfer heat at slower rate.... :)
Inessa [10]3 years ago
3 0
Glass has highest thermal conductivity between the three because it can transfer heat faster

Plastic is the second highest in term of thermal conductivity between the three

From the three, Wood has the lowest thermal conductivity, which is why it often used for kitchen utensils, because it can absorb heat

hope this helps

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Suppose you wanted to be able to see astronauts on the moon. what is the smallest diameter of the objective lens required to res
joja [24]

r = distance of moon from earth = 3.84 x 10⁸ m

R = size of the object on moon = 0.67 m

D = diameter of the lens = ?

\lambda = wavelength of light = 550 x 10⁻⁹ m

Using the equation for Rayleigh criterion

R/r = 1.22 \lambda/D

inserting the values

0.67/(3.84 x 10⁸) = 1.22 (550 x 10⁻⁹) /D

D = 384.6 m

4 0
3 years ago
An object is dropped from a platform100 ft high. Ignoring wind resistance, what will its speed be when it reaches the ground?
sweet-ann [11.9K]

Answer:

80 ft/s

Explanation:

Given:

Δy = 100 ft

v₀ = 0 ft/s

a = 32.2 ft/s²

Find: v

v² = v₀² + 2aΔx

v² = (0 ft/s)² + 2 (32.2 ft/s²) (100 ft)

v = 80.2 ft/s

Rounded, the speed when it reaches the ground is 80 ft/s.

4 0
3 years ago
Compared to red light, blue light has higher frequency and
irakobra [83]

higher frequency/shorter wavelength

OR

carries more energy than red light.

5 0
3 years ago
Which of these would have the greatest pressure?
PIT_PIT [208]
The third one because it is a small one and it had high and high temp so it has the most modecules.

Hope this helps
8 0
3 years ago
an elastic material of length 3m is to be stretched to produce an extension three times it's original length. Calculate the forc
Anastaziya [24]

Answer:

F = 8840.7 N

Explanation:

The parameters given are:

Length L = 3 metres

Extension e = 3 × 3 = 9m

Force constant K = 982.3 Newton per metre​

From Hook's law,

Provided the elastic limit is not extended, the extension is directly proportional to the force applied.

That is,

F = Ke

Substitute all the parameters into the formula

F = 982.3 × 9

F = 8840.7 N

7 0
3 years ago
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