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

Lösung ausblenden
TESTE DEIN WISSEN
Calorie
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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
Lösung ausblenden
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
Lösung ausblenden
• 3236 Karteikarten
• 280 Studierende
• 0 Lernmaterialien

## Beispielhafte Karteikarten für deinen Physics Kurs an der University of Saint La Salle - von Kommilitonen auf StudySmarter erstellt!

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

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

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