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- Multiple ChoicePlease save your changes before editing any questions.
When thermal energy is increased in a solid, what change in state is happening?
Melting
Evaporation
Freezing
Condensation
- Multiple ChoicePlease save your changes before editing any questions.
What happens to the movement of the particles in a substance when the thermal energy is increased?
Speed Up
Slow Down
- Multiple ChoicePlease save your changes before editing any questions.
Which two of these are included in the term 'fluids'?
solids
liquids
gases
metals
- Multiple ChoicePlease save your changes before editing any questions.
Which of these is not a change of state?
freezing
melting
cooling
evaporating
condensing
- Multiple ChoicePlease save your changes before editing any questions.
Which of these best describes the atoms in a solid such as gold?
they move all over the place quickly
they move all over the place slowly
they vibrate about a fixed position
they do not move at all
- Multiple ChoicePlease save your changes before editing any questions.
Which of these describes the random bombardment of air molecules?
Brown motion
Brownian motion
Bromine motion
Bronian motion
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Which of these best describes evaporation?
the escape of more-energetic molecules from the surface of a liquid
the escape of more-energetic molecules from the surface of a gas
the escape of less-energetic molecules from the surface of a liquid
the escape of less-energetic molecules from the surface of a gas
- Multiple ChoicePlease save your changes before editing any questions.
Which of these conditions is the best for drying clothes?
hot, dry, still
cold, dry, windy
hot, wet, still
cold, wet, windy
hot, dry, windy
- Multiple ChoicePlease save your changes before editing any questions.
Which of these is the correct equation for specific heat capacity?
E= mcT
E= mc/T
E= m/cT
E= m/c/T
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A mass of 5kg takes 2000J of energy to change its temperature from 40ºC to 50ºC. What is the specific heat capacity?
10 J/kgºC
20 J/kgºC
30 J/kgºC
40 J/kgºC
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During a change of state the temperature of a substance...
Stays the same
Increases
Decreases
- Multiple ChoicePlease save your changes before editing any questions.If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________one reaches a temperature of zerothey both have an equal temperatureone runs out of energy
- Multiple ChoicePlease save your changes before editing any questions.Temperature is a measure of the...total energy in a substancetotal kinetic energy in a substanceaverage potential energy in a substanceaverage kinetic energy of molecules in a substance
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Which quantity gives the thermal capacity of a beaker?
the thermal energy required to raise the temperature of the beaker by 1°C
the total volume of hot liquid that the beaker can hold
the total mass of hot liquid that the beaker can hold
the thermal energy required to change the state of the beaker at constant temperature
- Multiple ChoicePlease save your changes before editing any questions.The Law of Conservation of Energy states:Energy can created or destroyed but not transformedEnergy cannot be created or destroyed, it can only transformedEnergy can't be created, destroyed or transformed
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Brownian motion is defined as...
The random movement of small particles due to collisions with larger particles
The random movement of particles in a solid due to collisions with smaller surrounding particles
The random movement of particles around us
The random movement of particles in a fluid due to collisions with smaller surrounding particles
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When a substance is heated what happens to the particles
They change state
They evaporate
They gain kinetic energy and move more
They melt
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Evaporation...
Happens to every molecule in a boiling liquid
Only happens to the particles at the surface
Will increase with a smaller surface area
Is the same as boiling
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How does changing the temperature affect gas pressure?
Lower temperature means higher pressure
Higher temperature means higher pressure
Higher temperature means lower pressure
Temperature has no effect
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When gas is heated it becomes...
More dense
Heavier
Less dense
Lighter