Question

CAN SOMEONE PLEASE SOLVE C,D,E ALL OF THEM STEP BY STEP ( CLEAR HANDWRITING)

Data: mass-specific heat capacity of silver: cs 234 J kg-1K-1 mass-specific heat capacity of gold: c 126 J kg1K1 mass-specific heat capacity of platinum: cp 136 J kg K1 mass-specific heat capacity of ice: c 2100 J kg-1K-1 mass-specific heat capacity of water: cy4190 J kg 1K- latent heat of fusion of water: If 3.35 × 105 J kg-1 (a) Water of mass 0.1 kg at initial temperature 273 K undergoes heat transfer Q. After this process, all of the water has become ice at 250 K. Find Q (b) A solid sphere of platinum of radius R 0.01 m has heat capacity 12.25 J K-1. Use these facts to find the density of platinum (c) An object of total mass m is made of 3 substances: 50% by mass is gold. 30% silver, the rest is platinum. Its heat capacity is 250 J K-1. Find w. (d) 2 kg of silver at initial temperature Ts is placed in thermal contact with 0.1 kg of ice at initial temperature Ti-273 K. When thermal equilibrium is reached, 75% of the ice has melted. Find T. (e) A car of mass 1000 kg is travelling up a 5° gradient at initial speed 10 m s-1, with the engine off. The brakes are applied at this time and the car travels distance s along the road before stopping. Friction in the brake:s causes an increase in internal energy of 3 × 104 J. No energy transfer to or from the car occurs. Find distance s.

Answer 1