The topic is: How Coronavirus affected tourism?

Please, state the sites and references also.

5- A Cr-Ni steel wire is 2.5 cm in diameter and 30 m length has an applied voltage of 10 V while its surface is maintained at 90 C. Assuming that the resistivity is 70x10-7 ohm-cm and the thermal conductivity is 17.3 W/mK. Calculate the wire centerline temperature. Given that the one dimensional steady state conduction equation for cylindrical co-ordinates in radial direction is given as at kr + q" p Ct r dr ar Select appropriate control measures. Use PRA model and calculate the residual risks.