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17 Cards in this Set
- Front
- Back
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What is voltage?
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a measure of the energy given to each group of electrons
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What is current?
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a measure of how fast each group of electrons is moving
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What is a resistor?
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slows the current and usually produces heat and sometimes light in the process
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What is Ohm's Law?
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V=IR (voltage=current x resistance)
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What are some advantages and disadvantages of series circuits?
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Advantages: fewer wires, not too much current
Disadvantages: the more bulbs there are, the dimmer they are. If one breaks, the rest go off. |
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What are some advantages and disadvantages of parallel circuits?
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Advantages: brighter, if 1 breaks the rest stay on
Disadvantages: the more bulbs added in parallel, the more electricity- may overheat and cause fire. Battery runs out faster. |
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What is Newton's 2nd law?
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F=ma
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What is Newton's 1st law?
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An object will stay at rest or continue moving at a constant velocity unless acted on by an unbalanced force.
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What is Newton's 3rd law?
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For every action, there is an equal and opposite reaction.
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Tinea Facialis - features (2)
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1. Sharply demarcated
2. Serpiginous -Yayılan- borders |
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what is acceleration?
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a measure of the rate at which an object changes its velocity. An object accelerates when acted on by an unbalanced force.
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In a speed/time graph, how do you work out acceleration?
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acceleration= rise/run
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What is the difference between distance and displacement?
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Distance is a scalar quality- it is a measure of how far an object has travelled, not always in a straight line. No direction. Displacement is a vector quality, it is a measure of how far an object ends up from where it started, in a straight line, with direction.
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What is the difference between speed and velocity?
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Speed is distance per unit time, or the rate that distance is covered. Velocity is speed in a straight line, with a direction. Speed is scalar, velocity is vector.
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How does speed relate to time and distance?
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sp=d/t
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how does velocity relate to time and displacement?
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v=s/t
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How do you convert m/s to km/h? km/h to m/s?
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m/s to km/h= x3.6
km/h to m/s= divide by 3.6 |
