1. The energy of combustion of anthracite is 32 MJ/kg. If this energy is converted to electrical power at a conversion efficiency of 38%, how much anthracite is required per year to provide a steady 1...

1. The energy of combustion of anthracite is 32 MJ/kg. If this energy is converted to electrical power at a conversion efficiency of 38%, how much anthracite is required per year to provide a steady 1 GW of electrical power?

2. Indium is a strategic material. It plays a key role in solar PV technology as a transparent conductor. Use Google to explore alternative materials for transparent conductors, checking that they are not among the strategic elements plotted in Figure 12.8.