4. As I had indicated in class, I want everyone to check their FPL electric bill to get comfortable with the units and the magnitude of carbon emissions. I looked

at al energy consumption over the past twelve months was 28 kWh/d (ranging from 16.3kWh/d in December 2019 to 43.3 kWh/d in September 2020). There are twopeople in my household. Using this data: a) Why is there a monthly variation in electricity usage? Is this reasonable? (b) Calculate the per capita annual electricity consumption in kWh/person-year (c) Imagine that the electricity consumed is derived from a 32% efficient coal-fired power plant using coal with an energy content of 24 kJ/g and an average carbon content of 62%. Calculate the annual carbon emissions (d) Now imagine that you drive a car 10,000 miles a year with a fuel efficiency of 30 miles per gallon (mpg). Gasoline contains 5.22 Ibs of carbon per gallon, all of which ends up as CO2 when burned, and it has an energy density of 124,000 Btu/gal. Determine the annual carbon emissions (metric tons Clear) from driving this car (e) Now imagine that you switch from an internal combustion engine car to an electric car like the Tesla Model S, and average power consumption of 20kW at a speed of 65 miles per hour (mph). Report the Wh/mile at 65 mph and the kWh/year if you assume the Tesla is driven for the same 10,000miles a year. (e) Now imagine that you switch from an internal combustion engine car to an electric car like the Tesla Model S, and average power consumption of 20kW at a speed of 65 miles per hour (mph). Report the Wh/mile at 65 mph and the kWh/year if you assume the Tesla is driven for the same 10,000miles a year. (f) Assuming that the electricity for your Tesla Model S comes from the same coal-fired power plant that provides your home electricity, calculate the annual carbon emissions (metric tons C/year) from driving the Tesla. Does it seem a cleaner option than the old 30 mpg car? What would you advise?