PASCO SF-8563 Molecular Motion Demonstrator - Manual (Page 2)

012-03407B
2
Limited Warranty
PASCO scientific warrants this product to be free from
defects in materials and workmanship for a period of
one year from the date of shipment to the customer.
PASCO will repair or replace, at its option, any part of
the product which is deemed to be defective in mate-
rial or workmanship. This warranty does not cover
damage to the product caused by abuse or improper
use. Determination of whether a product failure is the
result of a manufacturing defect or improper use by the
customer shall be made solely by PASCO scientific.
Responsibility for the return of equipment for warranty
repair belongs to the customer. Equipment must be
properly packed to prevent damage and shipped
postage or freight prepaid. (Damage caused by
improper packing of the equipment for return shipment
will not be covered by the warranty.) Shipping costs
for returning the equipment, after repair, will be paid
by PASCO scientific.
bottom of the glass-walled container.
➁
Connect the function generator to the wave driver.
Start with minimum amplitude and low frequency
(a few Hertz) vibrations. Vary the amplitude and/or
frequency of the vibrations and observe the effects
on the ball bearings. As the energy transfer to the
ball bearings increases, the motion of the bearings
increases. Your students can get a sense for how a
solid substance, when heated, goes through phase
transformations, first to a liquid state, then to a gas-
eous state. They can also note how the bearing den-
sity varies with altitude, much as the density of at-
mosphere varies with altitude.
➂
Now slide the pressure plate into the slot in the top
of the container as shown.
Vary the amplitude and/or
frequency of the vibrations.
Your students can see how
the pressure exerted by the
bearings increases with in-
creasing kinetic energy.
They can also see how in-
creasing the kinetic energy
of the bearings (heating up in
a gas) can cause work to be
performed on the pressure plate, as heating a gas
can cause a piston to rise in a heat engine.
You can use an overhead projector to help your stu-
dents see the demonstration more easily. Just tilt
the Molecular Motion Demonstrator over the pro-
jector as shown in the illustration.
Overhead Projector
➃