The best way to evaluate the zero voltage of an A/D converter is to; a) Place a standard 100 ohm resistor between the two inputs b) Short the inputs c) Make sure the inputs are open d) Place a standard voltage source across the inputs

Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?