Power!

9 May 2019 (half-day)

Power is defined as the rate at which work is done, or at the rate at which energy is transferred.

Power = W/t

P stands for power (in watts)

W stands for the amount of work done (in Joules)

t stands for the amount of time (in seconds)

The standard unit for measuring power is the Watt. From the equation above we can see that power is W/t. The unit for work is the joule (J), so a Watt is the same as a joule/second or J/s. 

The second thing briefly talked about was efficiency.

Efficiency is a measure of how much work or energy is conserved in a process.

In many processes, work or energy is lost, for example as waste heat or vibration. The efficiency is the energy output, divided by the energy input, and expressed as a percentage.

After Unit Reflection : In this post, I demonstrated an understanding of power. I defined it, stated the formula and what it means, showed a sample calculation and stated the unit