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# 7 熱物理

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## 7 熱物理

Why are black robes worn in extreme ly hot climates?

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### •

The Celsius and Fahrenheit temper ature scales

TF = (9/5)TC+32°

• Kelvin Scale

TC = T – 273.15°

T3 = 273.16K triple point

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Bimetallic strip

### •

Optical pyrometer

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) )(

16 . 273 (

) (

3 3

3 3 3

0

p K p

p T p

T

Cp T

gh p

p

Cp T

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-240

C– 2700

C

-240

C– 2700

C

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### 熱（ heat ）的定義和單位

• J = Joule （焦耳）

• Cal = calorie （卡洛里）

• Btu = British Thermal Unit

Heat is the energy that is transferred between a system and its environment because of a temperature difference that exists between them

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2 7

1 6

2 11

0 0 0

t

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### 例三 Delivering diesel oil from Las Vegas to Payson

• 9785 gal, temperature difference 41°

F

•  = 9.510-4/C ° - diesel fuel

•  = 11 10-6/C ° - steel tank

4

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### 例四 水的 ”熱漲冷縮”

Number of laser modes depends on how the cavity modes intersect the optical gain curve.. In this case we are looking at modes within

The first row shows the eyespot with white inner ring, black middle ring, and yellow outer ring in Bicyclus anynana.. The second row provides the eyespot with black inner ring

1 Generalized Extreme Value Distribution Let Y be a random variable having a generalized extreme- value (GEV) distribution with shape parameter ξ, loca- tion parameter µ and

heat wave, extreme rainfall pattern, change in frequency and severity of wild-fire, drought and flooding, rising sea-level, change in ecosystems, disrupting crop yields and

● Using canonical formalism, we showed how to construct free energy (or partition function) in higher spin theory and verified the black holes and conical surpluses are S-dual.

• Atomic, molecular, and optical systems provide powerful platforms to explore topological physics. • Ultracold gases are good for exploring many-particle and

(A) To explain why it takes longer for old people to sleep (B) To explain why people have difficulties in sleeping (C) To explain why people have variations in sleep duration (D)