Final answer:
Rhodium becomes superconducting at a temperature of -273.1497°C when rounded to four decimal places.
Step-by-step explanation:
The temperature at which rhodium becomes superconducting is below 0.0003 Kelvin (K). To convert this temperature to degrees Celsius (°C), we use the formula °C = K - 273.15. Substituting 0.0003 K into the formula, we get:
°C = 0.0003 K - 273.15 = -273.1497°C
Therefore, rhodium becomes superconducting at a temperature of -273.1497°C, rounded to four decimal places.