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Pregunta 1
Pregunta
What direction does heat flow spontaneously (happening apparently)?
Respuesta
-
cold → hot
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hot → cold
Pregunta 2
Pregunta
What is temperature compared to thermal energy (difference)?
Respuesta
-
Temperature: overall or random amount of energy/heat (°F, °C, °K) , Thermal Energy: directly measured (Joules)
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Temperature: directly measured (°F, °C, °K) , Thermal Energy: overall or random amount of energy/heat (Joules)
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Temperature: directly measured (Joules) , Thermal Energy: overall or random amount of energy/heat (°F, °C, °K)
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Temperature: overall or random amount of energy/heat (Joules) , Thermal Energy: directly measured (°F, °C, °K)
Pregunta 3
Pregunta
Is work 100% efficient?
Respuesta
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Yes; it is ALWAYS lost
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Yes; it is NEVER lost
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No; friction gets ALL of the energy lost
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No; friction gets SOME of the energy lost
Pregunta 4
Pregunta
What is conduction?
Respuesta
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Energy transferred by 2 things TOUCHING
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Energy transferred through the movement of liquid or through CURRENTS
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Energy transferred from an energy source and DOESN'T have to travel through MATTER
Pregunta 5
Pregunta
What is radiation?
Respuesta
-
Energy transferred by 2 things TOUCHING
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Energy transferred through the movement of liquid or through CURRENTS
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Energy transferred from an energy source and DOESN'T have to travel through MATTER
Pregunta 6
Pregunta
What is convection?
Respuesta
-
Energy transferred from an energy source and DOESN'T have to travel through MATTER
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Energy transferred through the movement of liquid or through CURRENTS
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Energy transferred by 2 things TOUCHING
Pregunta 7
Pregunta
What is thermodynamics?
Respuesta
-
The study of heat and thermal energy
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The study of conversions between heat and other forms of energy
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The study of particle movement
Pregunta 8
Pregunta
What is the 1st law of thermodynamics?
Respuesta
-
We can never reach absolute zero
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Energy con never be created or destroyed and therefore must be conserved
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Energy flows from hot → cold (to go from cold → hot, you must do work)
Pregunta 9
Pregunta
What is the 2nd law of thermodynamics?
Respuesta
-
Energy flows from hot → cold (to go from cold → hot, you must do work)
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Energy con never be created or destroyed and therefore must be conserved
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We can never reach absolute zero
Pregunta 10
Pregunta
What is the 3rd law of thermodynamics?
Respuesta
-
Energy flows from hot → cold (to go from cold → hot, you must do work)
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We can never reach absolute zero
-
Energy con never be created or destroyed and therefore must be conserved
Pregunta 11
Pregunta
What does thermal energy depend on? (more than one answer)
Respuesta
-
temperature
-
volume
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density
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phase
-
mass
Pregunta 12
Pregunta
Most substances _____ when they freeze and _____ when heated. However, water _____ when it freezes _____ when it is heated.
Respuesta
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contrast; expand; expand; contrast
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contrast; expand; contrast; expand
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contrast; contrast; expand; expand
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expand; expand; contrast; contrast
Pregunta 13
Pregunta
What is specific heat?
Respuesta
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When 2 different objects reaching the same temperature
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Amount of heat needed to raise 1 gm of material 1°C
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Amount of energy an object can sustain
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Change in temperature
Pregunta 14
Pregunta
What is water's specific heat?
Respuesta
-
3.98 J/g°C ≈ 4 J/g°C
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4 J/g°C (exactly)
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2.98 J/g°C ≈ 3 J/g°C
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1.98 J/g°C ≈ 2 J/g°C
Pregunta 15
Pregunta
Is water's specific heat high or low compared to other materials?
Respuesta
-
high; temperature raises less when energy is added
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low; temperature raises less when energy is added
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high; temperature raises more when energy is added
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low; temperature raises more when energy is added
Pregunta 16
Pregunta
What is thermal equilibrium?
Respuesta
-
When 2 different objects reaching the same temperature
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Amount of heat needed to raise 1 gm of material 1°C
-
Change in temperature
-
Amount of energy an object can sustain
Pregunta 17
Pregunta
What do engines or motors do?
Respuesta
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They are machines designed to make electricity by making a turbine turn
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They are machines designed to make electricity by burning fuel
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They are machines designed to convert mechanical energy into other forms of energy
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They are machines designed to convert energy into mechanical energy
Pregunta 18
Pregunta
What is internal combustion?
Respuesta
-
Fuel sprayed into a cylinder which is then ignited and drives the piston (happening all together and inside motor)
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Fuel that is ignited outside of the motor along with combustion
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Burning happening inside a engine
Pregunta 19
Pregunta
What is external combustion?
Respuesta
-
Fuel that is ignited outside of the motor along with combustion
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Burning happening outside an engine
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Fuel sprayed into a cylinder which is then ignited and drives the piston (happening all together and inside motor)
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