Which of the following statements is true:

Same as previous question, 6kWh/m2/day but now for 26615 TWh per year.

What would the radius (km) of a circle of PV panels be a a solar farm required to generate 200TWh per year, assuming 6 kWh/m²/day and cell conversion efficiency of 20%?  Give your answer in km (remember to include the units in your answer).

In Northern Australia, Solar irradiance varies with longitude.  Why is this?

How many joules are in an Mtoe, BTU and GWh?

If the global total is 6.2 x 10²⁰J per year, and the global population is 8.2 billion, how much power does each person use?  Express the answer as kJ per s = kW.  Use one decimal place.

How much primary energy does the world's human population use in a year?  You can use the Energy Institute's database to get the total for 2023 (https://www.energyinst.org/statistical-review).  Note that more than one answer may be correct.

If we assume an adult consumes 10000kJ per day, how much is this in W? 

(Write your answer with one decimal place, and include the units)

How much energy is contained in the food a typical human eats in a day (kJ)?

How well do you understand solar energy already?