How much thermal energy does a 1 kg steel block with a specific heat capacity of 450 J/kg°C lose when it cools from 400°C to 60°C?
E=mc0E = 1 x 450 x (400-60)E = 1 x450 x 340E = 153,000J
MH
Related Physics GCSE answers
All answers ▸A transformer has an input voltage of 4V, an output voltage of 8V and 50 turns on its primary coil. Assuming 100% efficiency, find the number of turns on the secondary coil.
A charged particle in a cyclotron moves in a circle with radius 5mm. If the field in the cyclotron is 0.06 T and the velocity of the particle is 2.4x10^7, what is the charge-mass ratio of the particle?
A car travelling at 14 m/s has to make an emergency stop so applies the brakes and it takes 1.5s to become stationary. What distance has the van travelled in that time?
explain the relationship between resistance and voltage in a filament lamp