This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
Here are the solutions to your questions: 9 (a) (i) Explain linear expansivity. Linear expansivity is the fractional increase in length per unit rise in temperature of a substance. It is a material property that describes how much a material expands or contracts in length for each degree Celsius or Kelvin change in temperature. 9 (a) (ii) A brass rod and an iron rod differ in length by 24 cm at 20^ C. What should be the original length of the iron rod for the difference in length to remain the same when both rods are heated to 90^ C? Linear expansivity of brass = $1.9 × 1