Photograph of resistance versus temperatureApparatus:
lamp with resistor, light with capacitor, liquid nitrogen bath

Description:
Lamp with coil: plug in to wall socket. Remove the coil from its holders and immerse in nitrogen bath. The lamp will glow brighter now than before.
Light with capacitor: plug in to wall socket. Immerse capacitor in nitrogen bath. The light should be dim compared to before immersion of the capacitor in the nitrogen.