Types of Machines - JSS2 Basic science Past Questions and Answers - page 1
They gain kinetic energy
They disappear into nothingness
Because their particles slow down
Because their particles gain kinetic energy
What causes pressure in a gas, as per the kinetic theory?
Particles sticking together
Particles vibrating in place
Particles colliding with the container walls
Particles turning into vapor
When the vapor pressure is lower than atmospheric pressure
When the vapor pressure equals the atmospheric pressure
When the vapor pressure is higher than atmospheric pressure
When the liquid freezes
By particles freezing together
By particles gaining kinetic energy
By particles slowing down
By particles disappearing into vapor
Low-energy particles
Random particles
Particles with insufficient energy
High-energy particles
Only at high temperatures
Only at low temperatures
At any temperature
Only during boiling
How does the kinetic theory explain the cooling effect of evaporation?
By raising the temperature
By lowering the temperature
By increasing pressure
By expanding the liquid
It decreases
It increases
It disappears
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