IN BURGULAR ALARM ,THE LIGHT DEPENDENT RESISTANCE (LDR)ACTS AS A

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

In a system, when potential energy decreases, then entropy also decreases. true false

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same