Thermodynamics

Thermodynamics States About Energy Conversion Thermodynamics is the branch of science that embodies the principles of energy transformation in macroscopic systems. The general restrictions which experience has shown to apply to all such transformations are known as the laws of thermodynamics. These laws are primitive; they cannot be derived from anything more basic. The first law of thermodynamics states that energy is conserved; that, although it can be altered in form and transferred from one place to another, the total quantity remains constant. Thus, the first law of thermodynamics depends on the concept of energy; but, conversely, energy is an essential thermodynamic function because it allows the first law to be formulated. This coupling is characteristic of the primitive concepts of thermodynamics. The words system and surroundings are similarly coupled. A system is taken to be any object, any quantity of matter, any region, and so on, selected for study and set apart (men

Wheel Rotation

I have two wheels with rotate and connected each others like on the picture below. Wheel number 1 have radius R1 and wheel number two have radius R2. R1 is bigger than R2 have comparison size R1 = 2 R2. If this wheel rotate together what is the comparison speed of these wheels?

two gear are connected
Two Gear Connected

One time rotation of wheel number one have distance range 2 π R1 or same as the circumference of circle formula and one time rotation of wheel number two will have distance range 2 π R2. Because R1 = 2 x R2 so one time wheel number one rotate at the same time wheel number two will rotate twice, and both of wheel will move with the same distance.

Both of wheel have their own axe, this system is different if both of gear have the same axe like on the engine moving system that always connected with this system and make the speed of engine can faster. Look on the picture below:

Wheel number 2 is connected in the same axe with wheel number 3, wheel number 3 have similar radius with wheel number 1, but after all these wheels are rotated, wheel number 3 will have speed twice than wheel number 1, because wheel number 2 also rotate twice than wheel number 1 and wheel number 3 always have similar position with wheel number 2. This system is applied to the engine and they can be moved the connection from R2 to R3 and the speed of engine will change as the condition of the gear on the engine system.