An electric Iron rated at 2600 W contains a steel plate, heated to a working temperature of 215°C. Room temp=18°C. Deduce whether the plate could reach its working temperature in less than 1 minute. Mass (steel plate)=890g & C (steel)=450J/kg/K

We are given the power of the iron, 2600W and we know that Power = Energy/Time. We are also given the specific heat capacity of steel (C) which gives us a clue that we should use Q = mcT(delta) (meaning, Energy = massspecific heat capacitychange in temp).Therefore, to see what the heat energy transferred is, we do Q = 0.89kg * 450 * (215-18) = 78898.5 JThen, to see the time taken for this heat energy to be transferred, we do T = E/P = 78898.5 / 2600 = 30.3sTherefore, the plate reaches its working temperature in 30.3s, which is less than 1 minute.

Answered by Oni B. Physics tutor

3150 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

What is the difference between current and voltage?


What is the difference between voltage and current?


What is constant acceleration?


If Newton's 3rd law is true (all actions have an equal and opposite reaction), then how can any object move?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences