Final answer:
The specific gravity of a stone weighing 650 N in air and 275 N in water is calculated by dividing the weight in air by the loss of weight in water, which gives us a specific gravity of 1.73.
Step-by-step explanation:
To compute the specific gravity of a stone, which weighs 650 N in air and 275 N in water, we use the formula for specific gravity, which is the ratio of the weight of the object in air to the loss of weight in water. The loss of weight in water is the difference between the weight in air and the weight in water, which is 650 N - 275 N = 375 N. Specific gravity is dimensionless, so it does not have units. The specific gravity (SG) can be calculated as follows:
SG = Weight in air / (Weight in air - Weight in water)
SG = 650 N / 375 N
SG = 1.73