# Shared Flashcard Set

## Details

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

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
 -      + -      + -      + -      + -      + -      + What is the direction fo the electric field lines in between the two plates?
Definition
 leftward
Term
 -      + -      + -      + -      + -      + -      + 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.
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