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What is a force?
A push or pull on an object that can cause acceleration, change in direction, or change in shape.
What is net force?
The vector sum of all forces acting on an object.
Define pressure.
Force exerted per unit area: $P = F/A$.
What is impulse?
Change in momentum; equal to the force multiplied by the time interval: $J = F\Delta t = \Delta p$.
Define work in physics.
The transfer of energy through a force.
What is heat?
The transfer of energy due to temperature differences.
What is the effect of compressing a gas with a piston?
Increases the internal energy of the gas.
What causes thermodiffusive forces?
Temperature gradients in fluids.
What happens to the internal energy of an ideal gas if the temperature is constant?
The internal energy remains the same.
What are the differences between conservative and non-conservative forces?
Conservative: No work is done when an object returns to its starting point (e.g., gravity). Non-Conservative: Work is done even when an object returns to its starting point (e.g., friction).