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Random questions from PSA 1,2 YKt
Question | Answer |
---|---|
Define linear flow | flow of a fluid where the layers of flow are parallel, streamlined and no eddie currents are present. |
Give a symbol eqution for power | P=VxI |
explain why resistance increases in a wire as the temperature increases | as the temperature increases the metal atoms in the wire vibrate at a higher frequency and amplitude impedeing the flow of electrons. |
symbol equation for resistance in parallel | 1/R=1/R1 + 1/R2 + 1/R3 + 1/Rn |
what are the units for viscosity | [kgm-1s-1] |
what is 1 nano second in seconds | 1x10-9 seconds |
what is ohms law | V=IR |
why? | why not |