A hair dryer uses 2000J in 5 seconds when on full power. The power used is?
we are told that E = 2000J and t = 5s we need to find P
recall which formula used energy, time and power
P = E/t
sub in values
P = 2000/5
= 400 W (DONT FORGET UNITS)
TF
Related Physics GCSE answers
All answers ▸What actually is current? Why does it differ from potential difference?
Simon's car has run out of fuel. He must push his car 5 metres to the petrol pump, using a force of 200N. How much work does Simon do?
calaculate the resistance if two 3 ohm resitsors are placed in series and another 3 ohm was attached in parallel
In a doppler shift why does a moving source show no increase in speed of the mechanical waves emitted?