Physics, 20.10.2020 03:01 barbie1salome

1. A liquid of mass 250g is heated with an electric heater. Its temperature rises from 30°C to 80°C, the specific heat capacity of the liquid is 2000J/kg°C and the power rating of the heater is 500W. For how long was the heater used? 2. A solid metal of mass 2kg is heated using a heater of power 2kW for 5 minutes. Its final temperature becomes 400°C. Find the initial temperature of the metal. Specific heat capacity of the metal=1J/g°C.

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1. A liquid of mass 250g is heated with an electric heater. Its temperature rises from 30°C to 80°C,...