1.We brought into contact 1- cubic-inch blocks of aluminum and lead, with the aluminum block at 100 ºC and the lead block at 0 ºC. What is the temperature of each block at thermal equilibrium, that...

We brought into contact 1-cubic-inch blocks of aluminum and lead, with the aluminum block at 100 ºC and the lead

block at 0 ºC. What is the temperature of each block at thermal equilibrium, that is, when the

temperatures of the blocks are no longer changing?


1.We brought into contact 1- cubic-inch blocks of aluminum and lead, with the aluminum block at 100 ºC and the lead block at 0 ºC. What is the temperature of each block at thermal equilibrium, that is, when the temperatures of the blocks are no longer changing? 2. Use the analysis of the power of flowing water (the Ho Ho Kus Brook) presented in the document 1, together with the equality Volume Flow = Flow Velocity x Cross Sectional Area of the flow to show that the power density of flowing water is given by a relation just like that for the power density of flowing air in document 2 namely, for flowing water Power Density = ½ mass density of water x v3 For the same flow velocity, what is the ratio of the power density of flowing air to the power density of flowing water? 3. Hydroelectric power is most commonly provided by building a dam and controlling the flow of water through a turbine connected to a generator, as depicted in document 3. In this case it is the change in potential energy of the water, ∆V=mg∆x, that is converted into electrical energy by letting the potential energy of the water be converted into kinetic energy as the water flows down to the turbine. The height of the water above the turbine, ∆x, is referred to as the hydraulic head. If a dam had a hydraulic head of 100 m, what volume flow would be needed to give an electrical power generation of 10 GW? You can assume 95% conversion of the potential energy of water to electrical energy when using a dam/turbine/electrical generator combination.