1. 1) Summary of climate change model and green house gases; 2) Introduction to kinematics.

2. Predictions of climate models
Simple model without atmosphere
Ts4 = (1-A) S / 4σ, >Ts = 255 K.
An improved model with atmosphere
TA4 = (1-A)S/4σ,
Ts4 = (1-A) S / 4σ + TA4 = 2 TA4 =2 (1-A) S / 4σ

3. Q1
Current earth surface temperature is about 30C. If the distance from the earth to the sun is doubled, the surface temperature of the earth is about
0C;
-10 C;
- 60C;
4) -120C.

4. Q2 (optional question) If the surface temperature of the Sun
increases by 10%, then the earth temperature (surface) will
1) increase by 46%;
2) increase by 33%;
3) increase by 21%;
4) Increase by 10%.

5. A closer look at the infrared region.

6. Major Constitute of Earth Atmosphere
Name Concentration by vol. Concentration by ppm
Nitrogen
Oxygen
Water vapor – ,000
Carbon dioxide
Ozone,
Example: Green house gases

7. Kinematics kinematics describes the motion of an object.
Translational kinematics is about the position changes with time.
We describe motion:
use motion diagrams
use graphs

8. A B C D
Q1. Which motion diagram shows an object slowing down.
Q2. Which motion diagram shows an object speeding up.
Q3. Which motion diagram shows a stationary object
Q4. Which motion diagram shows an object moving with a constant speed.

9. Position y as a function of time t.
Graphs
Position y as a function of time t.
Constant velocity y
No motion t

10. Kinematics Position Displacement x= x2 - x1
Speed = distance traveled / time elapsed
Velocity = displacement / time elapsed
v = (x2 - x1)/(t2 - t1) = x/t
Instantaneous velocity
v = lim x/t t

11. Acceleration Average Acceleration a = v/t Instantaneous Acceleration
a = lim v/t t