The complete question is how much heat energy is delivered by the iron in 30 seconds.
Heat is given by IVt, Where I is the current in Amperes, V is the voltage, and t is the time in seconds,
Therefore;
Heat energy = 120 × 10 ×30
= 36000 joules or 36 kJ
Heat energy is measured in joules.
A 4x100 relay is where 4 people run 100 meters and a 4x400 relay is where 4 people run 400 meters
The answer is A, because it’s the first one
