A lamp has a luminous intensity of 1200 candelas and acts as a point source. The lamp is situated 2.5m above the office floor, which is 6m wide.Calculate the illuminance in lux, on the floor surface directly below the lamp.
a) Calculate the total rate of heat lossfor the building described below: •The building is 15m long by 8m wide by 3.5m high. •In the walls are two windows, one 1.2m x 0.6m, the other 1.8m x 1.8m and there is one door 1.75m x 0.8m. •The construction has the following U-values in W/m²K: windows […]