Energy can be transferred from one form to another, but I’m not sure how to visualize what it looks like when this happens. For example, what would the kinetic energy of a moving car look like if all the energy (perfectly converted) was heat, sound, or light?
In: 0
Rather than consider energy, consider power.
Energy can be built up and stored. It’s not really fair to compare as some things happen gradually and some happen instantaneously.
Power is instantaneous energy rate. Energy divided by time.
100W is using 100J per second.
So I’m on mobile and don’t have exact numbers to hand. Here’s some basic ones off the top of my head:
Cycling hard on a bike would be at least 500W for most people. A car’s engine would easily be 100kW (100,000W).
An led ligttbulb might be 5W, an old filament one maybe 100W (the old ones are really inefficient and actually produce loads of heat instead of pure light)
A laser strong enough to damage your eyes could be 1mW (0.001W).
An electric room heater would be 500-1000W.
An electric shower that instantly heats cold water would generally be around 8kW.
A kitchen blender can be anything from 200-1000W.
A kettle would be 1-2kW.
Latest Answers