Question

a)A piece of iron block moves across a rough horizontal surface before coming to rest. The mass of the block is 3.3 kg, and its initial speed is 3.2 m/s. How much does the block's temperature increase, if it absorbs 74% of its initial kinetic energy as internal energy? The specific heat of iron is 452 J/(kg · °C).
°C

b)Some stove tops are smooth ceramic for easy cleaning. If the ceramic is 0.590 cm thick and heat conduction occurs through an area of 1.31 ✕ 10⁻² m² at a rate of 2271 J/s, what is the temperature difference across it (in °C)? Ceramic has the same thermal conductivity as glass and brick.

  °C

Answer 1