A spiral spring with a metal extends by 10.5 cm in air. When the metal is fully submerged in water, the spring extends by 6.8 cm. Calculate the relative density of the metal. (Assume Hooke's law is obeyed)
Verified Correct Answer: .
Physical Principles & Numerical Solution
R.d = \(\frac{\text{weight of object in air}}{\text{upthrust in water}}\)
= \(\frac{10.5}{10.5 - 6.8} = \frac{10.5}{3.7} = 2.84\)
Source: Myschool Past Questions Archive (Record #53242)