3. A calorimeter of mass 0.2 leg contains mass o. sk A current of 20A flows through a heater immersed in the
Kerosene for 5 minutes and the temperature changes by
24 °C what is the Voltage across the heater [take
Specific heat capacity of calorimeter as 39014K and
Kerosene's as 2100 J kg - k-]​

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.