Aplumber is hired to plumb a house that has been renovated. in doing so the length of the pipe from the water heater to the bathroom is quadrupled. in order to maintain the same conductance to the bathroom that the original pipes (of radius r) had, what radius of pipe should the plumber use compared to the original pipes? ½ r ¼ r 2r 4r

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.