What should be the characteristics of an electric-fuse wire?
1) High melting point, high specific resistance
2) Low melting point, low specific resistance
3) High melting point, low specific resistance
4) Low melting point, high specific resistance

Unit of specific resistance

A platinum resistance thermometer has resistances of 170.0 when placed in a 0°C ice bath and 244.8 when immersed in a crucible containing a melting substance. What is the melting point of this substance? (Hint: First determine the resistance of the platinum resistance thermometer at room temperature, 20°C.)

Please show the work! Thanks!!


A platinum resistance thermometer has resistances of 220.0 whenplaced in a 0°C ice bath and 262.8 when immersed in a cruciblecontaining a melting substance. What is the melting point of thissubstance? (Hint: First determine the resistance of the platinumresistance thermometer at room temperature, 20°C.)