# Shared Flashcard Set

## Details

Chapter 16: Relativity: Momentum, Mass, Energy, and Gravity
Chapter 16: Relativity: Momentum, Mass, Energy, and Gravity Questions
24
Physics
12/30/2011

Term
 The speed of light is the _______ __________ for all matter
Definition
 speed limit
Term
 Two spaceships both traveling close to C toward each other. Is the relative speed over C?
Definition
 No. Space-time for each spaceship differs in such a way that the relative speed is still less than the speed of light.
Term
 There are/are not any circumstances where the relative speeds of any material surpass the speed of light?
Definition
 are not
Term
 For a moving object. Which changes space or time?
Definition
 Both
Term
 Moving objects contract when viewed by an outside observer. Which way does it contract?
Definition
 Direction of motion
Term
 Changes due to alterations of space-time are always seen in the frame-of-reference of the “________ ________”
Definition
 other guy
Term
 The contraction of speeding objects is the contraction of ________ itself.
Definition
 space
Term
 What is Newton’s equation for momentum?
Definition
 p = mv
Term
 Given Einstein’s Relativity Equation for Momentum: p = mv/(1-(v2/c2))1/2 , when V is slow, what is p?
Definition
 p = mv, the same as Newton's
Term
 Given Einstein’s Relativity Equation for Momentum: p = mv/(1-(v2/c2))1/2 , when V is high, what is p?
Definition
 p gets much larger than just mv
Term
 Given Einstein’s Relativity Equation for Momentum: p = mv/(1-(v2/c2))1/2 , what is m?
Definition
 rest mass
Term
 Define: rest mass
Definition
 A true constant, a property of the object at all speeds
Term
 The more momentum a high speed particle has, the harder it is to _____________ it.
Definition
 deflect
Term
 ___________ is a way of expressing a resistance to change
Definition
 Momentum
Term
 Einstein’s Relativity Equation for Energy is: E = mc2/(1-(v2/c2))1/2, when V is 0, what is the Energy of an object at rest Eo?
Definition
 Eo = mc2
Term
 What is the real name for: Eo = mc2?
Definition
 Rest mass formula
Term
 Kinetic Energy is the difference between Total Energy and Rest Energy. So, E = mc2/(1-(v2/c2))1/2 - What is Eo?
Definition
 mc2
Term
 Even at rest, an object has _________ which is locked in its mass.
Definition
 energy
Term
 As the speed of an object approaches the speed of light, both its ____________ and __________ approach infinity, so there is no way the speed of light can be reached.
Definition
 momentumenergy
Term
 Can light be brought to rest?
Definition
 No. Light has no rest mass. Light always travels at the same speed, c.
Term
 Define: correspondence principle.
Definition
 New and old theories must overlap and agree in areas where old theories have been tested.
Term
 Using the Relativistic Rest Mass formula: Eo = mc2, are mass and energy equivalent?
Definition
 Yes. Anything with mass also has energy
Term
 During any reaction, the total __________ remains the same
Definition
 energy
Term
 If mass and energy are equivalent. What happens if mass loss happens?
Definition
 Energy is released
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