What is the unit for gravitational field strength?
N/kg.
1 of 10
Which direction does the force always act in simple harmonic motion?
Towards the point of zero displacement.
2 of 10
What affect does doubling the displacement have in simple harmonic motion?
The force is doubled.
3 of 10
What assumption must be made when using pulses of light to calculate distances?
Speed of light towards and away from surface is the same/ flight time for light is the same in both directions/ light in atmosphere almost same as that in free space.
4 of 10
What does the quantity E (epsilon) in the Boltzmann factor represent?
Activation energy that allows a particle to do something.
5 of 10
What is the quantity kT in the Boltzmann factor?
The average thermal energy per molecule.
6 of 10
What is the correct unit for specific thermal capacity?
J/kgK
7 of 10
Why does a gas particle take a few minutes to travel through about a metre of air?
Gas particles change direction because they collide with other particles.
8 of 10
Explain how gas particles in the Earth's atmosphere are able to exert a downwards force on the ground.
Particles bounce off the ground so the momentum of the particles/ground changes. The force exerted on the ground is the rate of change of momentum.
9 of 10
Explain why the atmospheric pressure at a given height h increases when the temperature is raised.
The gas particles have more kinetic energy so move around more so there is an increased rate of collisions.
10 of 10
Other cards in this set
Card 2
Front
Which direction does the force always act in simple harmonic motion?
Back
Towards the point of zero displacement.
Card 3
Front
What affect does doubling the displacement have in simple harmonic motion?
Back
Card 4
Front
What assumption must be made when using pulses of light to calculate distances?
Back
Card 5
Front
What does the quantity E (epsilon) in the Boltzmann factor represent?
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