An electric heater is used to heat oil in a beaker. The power of the heater is 150 W150\text{ W}150 W. The mass of the oil in the beaker is 800 g800\text{ g}800 g. It takes 8.0 minutes8.0\text{ minutes}8.0 minutes to increase the temperature of the oil from 25∘C25^\circ\text{C}25∘C to 55∘C55^\circ\text{C}55∘C. Calculate the thermal energy transferred from the oil to the beaker and the surroundings. (Specific heat capacity of oil = 2100 J kg−1 K−12100\text{ J kg}^{-1}\text{ K}^{-1}2100 J kg−1 K−1)
56 exam-style questions on OCR A A Level Physics Thermal physics, covering Temperature, Solid, liquid and gas, Thermal properties of materials, and Ideal gases. Each one has a worked solution and a mark scheme showing where the marks go.