exam review
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| What is velocity? | The speed of something in a given direction.
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| What is Newtons 1st law? | An object in rest will stay in rest, and an object in motion will stay in motion until acted upon.
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| What is Newtons 2nd law? | The acceleration of an object depends upon two variables, the net force and the mass.
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| What is Newtons 3rd law? | For every action there is and equal and opposite reaction.
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| What is an elastic reaction and what does it do? | A type of collision where the total kinetic energy of the system is conserved. It's between 2 physical objects in which the total kinetic energy of the 2 bodies remain the same.
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| What is thermal energy? | Energy contained within a system that is responsible for its temperature.
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| How do you calculate voltage? | Voltage is equal to current, multiplied by resistance.
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| What is voltage? | An electromotive force or potential difference expressed in volts.
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| What is a current? | A flow of charged particles, such as electrons or ions.
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| What is resistance? | Resistance is a measure of the opposition to the flow of current in an electrical circuit.
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| What things affect the rate of heat transfer? | Temperature difference between the objects, The material and thickness of the objects, and the surface area.
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| How do you tell if a circuit is open or closed? | A circuit is open if there's a break in the path for current to flow, meaning no current is flowing. A circuit is closed if it's a complete path, allowing current to flow.
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| What is the difference between a transverse and longitudinal wave? | The direction of the particle motion relative to the wave's direction of travel.
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| What are the units that we measure frequency in? | Hertz.
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| What's an electromagnetic wave? | Electromagnetic radiation is a self-propagating wave of the electromagnetic field that carries momentum and radiant energy through space.
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| What is a hypothesis? | A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
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| Whats velocity's equation? | Distance divided by Time.
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| What does acceleration mean? | Increase in the rate or speed of something.
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| What are the units for work? | Joules
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| How do you calculate work? | Force times distance
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