You wanted to design a doorbell system that was able to differentiate between the front door and the back door with a different sound, but the entire system was housed in the same unit. How would your design have to change in order to make that possible? Describe your new unit OR draw a detailed picture including labels for your new doorbell.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]