Final answer:
The relative density of the object is 0.4.
Step-by-step explanation:
The relative density of an object can be determined by comparing its weight in air to its weight when immersed in water. The relative density is the ratio of the weight in air to the loss of weight in water. In this case, the object weighs 2.6 N in air and 2.2 N when completely immersed in water. Therefore, the relative density can be calculated as:
Relative density = (weight in air - weight in water) / weight in water = (2.6 N - 2.2 N) / 2.2 N = 0.4
So the relative density of the object is 0.4.