3.87kg lead billet is to be melted for a casting operation. Lead has a melting point of 328°C a specific heat capacity of 128 j/(kg.k) and a latent heat of fusion of 23,200 j/kg. a- calculate the amount of heat required to heat the lead from the starting temperature 22.4°C to its melting point of 328°C. b- calculate the amount of heat needed to melt the lead brick once it reaches 328°C

11. You are asked to design a cylindrical steel rod 0.50 m long, with a circular cross section, that will conduct 150.0 Jls from a furnace at 400 °C to a container of boiling water. What must the rod's cross sectional area be? Note the thermal conductivity of steel is 50.2 W/m K. * A. 0.00498 cm^2 O B. 0.498 cm*2 O c. 37.4 cm^2 O D. 49.8 cm^2 O E. 4980 cm^2

2. Gain or loss of energy? write G or Lin the blank A. I When water freezes. В. During sublimation. C. When water boils. D. g When ice melts. E. During condensation. F. When water turns to steam. 3. is it a Solid, Liquid, or Gas? write S, Lor G in the blank A. Water at 50° C. B. Water at 120°C. C. Water at 10° C. Water at -5°C. E. Water at 100°C. F. * Water at 285 K. (bonus) D. Match each term to the correct description. You will only use each term once. 4. Insulator A. A region of space that contains no matter. e 5. Conductor B. Allows convection, but is a very good insulator. 6. Vacuum C. Any material that easily allows heat to move through it. a D. Allows convection; can be a good conductor of heat. 7. Solid E. Materlal that resists the movement of heat through it. 8. Liquid

A 0.03 kg lead bullet traveling 121 m/s strikes an armor plate and comes to stop. If all of the bullet’senergy is converted to heat that it alone absorbs, what is its temperature change?  Specific Heat Capacity  of the lead is   g = 9.8 m/s2  Calculate to one decimal.