A writing desk stands on a base of external dimensions 80cm multiplied by 70cm and internal dimensions 70cm multiplied by 50cm. The total weight of the desk and base is 400N. Calculate the average pressure the desk exerts on a horizontal floor (i) in Ncm^-2 (ii) in Pa

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.