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Buoyancy, heat, and electrons
PSC 1121
27
Physics
04/14/2009

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Cards

Term

kq1q2

r2

Definition
coulomb force between two charges
Term

kq

r2

Definition
electric field of a single charge
Term
Heat gain/ heat loss formula
Definition
mcΔT
Term
Generic pressure formula
Definition
force/area
Term
Equation of state for an ideal gas
Definition
PV/T= nR; PV=nRT
Term
Definition of Density
Definition
mass/volume
Term
Measuredin Pascals, i.e. Newtons/m2
Definition
Force/area
Term
Thermal expansion
Definition
α L ΔT
Term

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What is the direction fo the electric field lines in between the two plates?

Definition
leftward
Term

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A proton in between the two plates will tend to accelerate in which direction?

Definition
leftward
Term
Two charged objects are very, very far from any other charges. if the charge on one of them is changed in sign, the electric force between them
Definition
reverses in direction.
Term
The shape of an electric field changes, perhaps, but one thing is for sure:
Definition
where field lines are closely packed, the field is relatively strong.
Term
If the signs of the charges on two charged objects are both reversed, the electric force between them
Definition
does not change.
Term
The electric charge on an electron ______ that on a proton.
Definition
has the same size but the opposite sign as
Term
The electric field around an isolated positive charge
Definition
points outward.
Term
Weight force means
Definition
weight/gravity
Term
Upward force is
Definition
gravity - weight force
Term
Heat is the
Definition
thermal energy that is transferred from one object to another.
Term
How many joules are equivalent to 21 calories?
Definition
88
Term
A calorie is defined to be the amount of heat required to raise the temperature of
Definition
1 gram of water by 1° C.
Term
In conduction, thermal energy is transported by
Definition
the collisions of particles.
Term
In convection, thermal energy is transported by
Definition
the movement of a fluid.
Term
 
In radiation, thermal energy is transported by
Definition
electromagnetic fields.
Term
The constant is
Definition
cal/g°C
Term
 
A positively charged object repels
Definition
positively charged objects.
Term
The electric force on a negative charge located near an isolated positive charge
Definition
points toward the isolated charge.
Term
Two parallel plates have equal but opposite charges. The electric force on a negative charge placed near the center of the plates is
Definition
perpendicular to the plates and points toward the positive one.