Class Notes 9/17

Fundamental Forces in Nature:          Strength Relative to the Strong Force:

-Strong (nuclear)                                          1.0

-Electromagnetic                                         10^-2

-Weak                                                            10^-13

-Gravitational                                               10^-38

*watched powers of ten video*

Force:the thing that compels an object to change its state of motion.

-from rest to motion

-from one speed to another

F=ma

[kg] [m/s^2] 

Energy and Power

E= F d

[kg] [m^2/s^2] Joules [J]

P= E/t

[Joules/sec] Watts

Energy:

Mechanical

Sound

Gravitational

Nuclear

Electromagnetic

Kinetic Energy <----> Potential Energy

Conservation of Energy

c (speed of light)

c=wavelength multiplied by frequency

*Greenhouse Gases

Gas: ability to fill any container

Greenhouse gas: absorbs infrared radiation

ex; H2o, CO2, CH4

Greenhouse Eeffect

-sunlight (visible spectrum) enters and warms

-greenhouse gases absorb infrared radiation and keep heat in the atmosphere