# Shared Flashcard Set

## Details

Physics Test 1:4
Physics Test 4 of 4 First Class
17
Physics
Not Applicable
08/02/2011

Term
 Convection
Definition
 Heat transfer due to the actual motion of the fluid itself.
Term
 Newton's law of cooling
Definition
 The rate of cooling of an object-whether by conduction, convection, orradiation-is approximately proportional to the temperature difference ~ Tbetween the object and its surroundings.
Term
 Conceptual formula for Torque
Definition
 Torque = lever arm X force
Term
 Formula for centripetal force
Definition
 F = mv2/r
Term
 Law of conservation of angular momentum
Definition
 Iw = IwWhere I = rotational inertiaandw = rotational velocityAngular momentum also = mvr
Term
 How is rotational speed expressed? What Units are used?
Definition
 wRPMs are used
Term
 Distinguish between angular and linear momentum
Definition
 Angular momentum = rotational inertia X rotational velocityAngular momentum also = mvrLinear momentum = mass X velocity
Term
 Formula for rotational KE
Definition
 KE = 1/2Iw2 + 1/2mv2
Term
 Line of action?
Definition
 The line of action of a force F expresses the geometry of how F is applied. It is the line through the point at which F is applied
Term
 What is the lever arm?
Definition
 The perpendicular distance between the line of action of a force and a pivot
Term
 connection between linear and rotational motion
Definition
 ∆ x∆ t = vlinear = r • w
Term
 What are the units for specific heat?
Definition
 Joules/kg•K
Term
 What is the equation for heat?
Definition
 Q = m x C x ∆Tm = massC = specific heat T = temperature
Term
 What is the physicists version of PV = nRT?
Definition
 PV = NKTN = amount of a substanceK = Boltman's constantT = temperature in Kelvins
Term
 What is the formula for average translational kinetic energy?
Definition
 K.E. = 3/2kTk = Boltman's constantT = temperature in Kelvins
Term
 Define Translational KE
Definition
 motion that carries the molecule from one place to another
Term
 Define Internal Energy
Definition
 In addition to the translational kinetic energy of jostling molecules in a substance, there is energy in other forms. There is rotational kinetic energy of molecules and kinetic energy due to internal movements of atoms within molecules. There is also potential energy due to the forces between molecules. So a substance does not contain heat-it contains internal energy.
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