A piece of metal of mass 400g of specific heat capacity 500j/kg/k is placed in an oven and allowed to attain a steady temperature. It is quickly transfered into a calorimeter containing 1000g of water at 30°c. The thermal capacity of the calorimeter and stirrer is 105j/k. If the final temperature of the mixture is 35°c. Find the temperature of the oven. ( specific heat capacity of water is 4200j/kg/k). ​

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.