Cambridge Secondary (7-9). Stage 9. Science. Learner's Book - Unit 3: Forces and energy - Question 93

Think like a scientist: Temperature change from heat dissipation. Work in groups of two or three. Use a 2 V or 6 V lamp, holder, cells, wires, connectors, a 50 cm³ (or smaller) beaker, water, thermometer and timer. This experiment must be done in the school laboratory with teacher supervision. Only the glass part of the lamp is in the water. Never put a lamp in water at home. Set up as shown, use a small volume of water, record its temperature, switch on the lamp and record temperature every minute until it stops changing.



Carry out the investigation safely.