Holding viscosity fixed shows relaxation time as viscosity divided by modulus. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Twenty-four divided by four gives six seconds
Hold viscosity at 24 Pa*s. Modulus 4 pascals gives relaxation time 6 seconds.
24/4=6
Eight pascals cuts the time to three seconds
With viscosity unchanged, modulus 8 pascals gives time 3 seconds. A larger modulus shortens this toy relaxation ledger.
24/8=3
Twelve pascals gives the two-second base time
At modulus 12 pascals, the checked time is 2 seconds. This closes the same viscosity-over-modulus relation used earlier.