Physics at University Of Saint La Salle | Flashcards & Summaries

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Lernmaterialien für Physics an der University of Saint La Salle

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TESTE DEIN WISSEN
Surface Tension 
Lösung anzeigen
TESTE DEIN WISSEN
  • Force created by water molecules attracting one another
  • Cold water has higher ST because hot water has more dynamic molecules that pull on each other less
Lösung ausblenden
TESTE DEIN WISSEN
Efficiency 
Lösung anzeigen
TESTE DEIN WISSEN
A machine can never be 100% efficient, some energy is given out as heat
  • Efficiency = W(output)/W(input)
Lösung ausblenden
TESTE DEIN WISSEN
Kinetic Energy
Lösung anzeigen
TESTE DEIN WISSEN
KE is equal to the work done to bring an object to a certain speed
  • KE = 1/2 MV^2
Lösung ausblenden
TESTE DEIN WISSEN
Temperature 
Lösung anzeigen
TESTE DEIN WISSEN
Measure of the AVERAGE KE in a substance
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TESTE DEIN WISSEN
Heat (Joule)
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TESTE DEIN WISSEN
  • Energy transfer from a warmer to a colder object 
  • Transfer does not only depend on heat gradient but also on volume
> Greater Volume = More inclined for heat transfer 
> Greater Volume = More molecules = Less heat gained


Lösung ausblenden
TESTE DEIN WISSEN
Thermometers 
Lösung anzeigen
TESTE DEIN WISSEN
  • Detection of Expansion or Contraction
  • Hotter Objects = Higher KE in atoms = Expand

Lösung ausblenden
TESTE DEIN WISSEN
Calorie
Lösung anzeigen
TESTE DEIN WISSEN
Amount of heat needed to increase the temperature of 1 g of water by 1’C
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TESTE DEIN WISSEN
Specific Heat Capacity 
Lösung anzeigen
TESTE DEIN WISSEN
Amount of heat needed to increase the temperature of a unit mass by 1’C
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TESTE DEIN WISSEN
Unique Property of Water
Lösung anzeigen
TESTE DEIN WISSEN
Between 0’ - 4’ C:
  • 0 - 3’C - water is filled with ice crystals 
  • 4’C - melts those crystals and decreases volume 
  • > 4’C - increases volume (normal expansion)
Lösung ausblenden
TESTE DEIN WISSEN
Conductivity
Lösung anzeigen
TESTE DEIN WISSEN
  • When a substance has loose outer electrons
  • Silver is the best conductor > Copper > Aluminum > Iron
Lösung ausblenden
TESTE DEIN WISSEN
Condensation 
Lösung anzeigen
TESTE DEIN WISSEN
  • Warm air causes H20 molecules to move fast and collide while cold air causes them to stick
  • Thus, warm air can hold water vapor more (humid) while cold air condenses and forms droplets of water
Lösung ausblenden
TESTE DEIN WISSEN
Boiling
Lösung anzeigen
TESTE DEIN WISSEN
  • Causes water at the bottom to evaporate, forming bubbles
  • It is a cooling process that maintain water at 100’C  instead of a continuous increase
  • By reduction of pressure, boiling can also take place (in a vacuum) in order to reduce temperature even until freezing
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  • 280 Studierende
  • 0 Lernmaterialien
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Q:
Surface Tension 
A:
  • Force created by water molecules attracting one another
  • Cold water has higher ST because hot water has more dynamic molecules that pull on each other less
Q:
Efficiency 
A:
A machine can never be 100% efficient, some energy is given out as heat
  • Efficiency = W(output)/W(input)
Q:
Kinetic Energy
A:
KE is equal to the work done to bring an object to a certain speed
  • KE = 1/2 MV^2
Q:
Temperature 
A:
Measure of the AVERAGE KE in a substance
Q:
Heat (Joule)
A:
  • Energy transfer from a warmer to a colder object 
  • Transfer does not only depend on heat gradient but also on volume
> Greater Volume = More inclined for heat transfer 
> Greater Volume = More molecules = Less heat gained


Mehr Karteikarten anzeigen
Q:
Thermometers 
A:
  • Detection of Expansion or Contraction
  • Hotter Objects = Higher KE in atoms = Expand

Q:
Calorie
A:
Amount of heat needed to increase the temperature of 1 g of water by 1’C
Q:
Specific Heat Capacity 
A:
Amount of heat needed to increase the temperature of a unit mass by 1’C
Q:
Unique Property of Water
A:
Between 0’ - 4’ C:
  • 0 - 3’C - water is filled with ice crystals 
  • 4’C - melts those crystals and decreases volume 
  • > 4’C - increases volume (normal expansion)
Q:
Conductivity
A:
  • When a substance has loose outer electrons
  • Silver is the best conductor > Copper > Aluminum > Iron
Q:
Condensation 
A:
  • Warm air causes H20 molecules to move fast and collide while cold air causes them to stick
  • Thus, warm air can hold water vapor more (humid) while cold air condenses and forms droplets of water
Q:
Boiling
A:
  • Causes water at the bottom to evaporate, forming bubbles
  • It is a cooling process that maintain water at 100’C  instead of a continuous increase
  • By reduction of pressure, boiling can also take place (in a vacuum) in order to reduce temperature even until freezing
Physics

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