What causes the pressure in a gas?

 

Temperature and Volume for a Gas

| mittechtv_5166.mov |mittechtv_5166.wmv |

 

This happens when you don't
properly vent a storage tank

"This happens when you don't properly vent a sealed storage tank before emptying it.
Hot gas/air in the sealed container is left to cool. The air pressure difference inside is so great that the structure is compromised. "

 

 

B) Kinetic Energy - the energy an object possesses due to its' motion

 

 

 

 

Newton mistakenly believed that the
kinetic energy of a moving body was
directly related to its velocity.

 

 

 

 

KE,V have a ....

 

Direct Square Relationship

 

 

 

Wpclipart

 

 

Equation

KE = (˝)mv2

 

 

 

 

 

Relationships

 

KE/m

 

 

 

Direct

 

 

 

KE = (˝)mv2

 

 

KE/v?

 

 

 

 

Direct Square

 

 

 

 

 

 

 

 

 

 

 

Ex 1) A 60.0-kg runner has 1920 joules of kinetic energy.

At what speed is she running?

 

 

Ex) A 60.0-kg runner has 1920 joules of kinetic energy.

 

At what speed is she running?

 

 

 

KE = (˝)mv2

m = 60.0 kg
KE = 1920 J

V = ?



1920 J=(1/2)60.0kgV2

 

1920 J = 30 V2

 

64.0 = V2

 

V = 8.00 m/s

 

 

Summary  W, K E, PE

 

 


K.E. - equivalent to work needed to get
an object to a certain
 speed
or to stop it.


 


P.E. - Equivalent to work needed to get an object to where it is or into its present condition.( spring)

 

 

W = Fd = ΔPE

 

 

If W = 40 J

 

Then ...

 ΔPE = 40 J

 

 

 

 

 

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