An example of a statement that shows how a heat pump works is:
A heat pump compresses gas to warm air and decompresses gas to cool air.
Hope this helped!
A vector has a size and a direction. The size is called the magnitude of the vector.
Momentum = Mass × Velocity
= 61 × 8
= 488 kg m/s east
= 500 kg m/s east
Momentum is a vector quantity which means it has a direction as well as a numerical value (fancy word for this is magnitude). This means the final answer should also be in the direction "east".
Furthermore due to the significant figures in the question, the final answer should also be given to 1 sig fig (500) but if you don't want to then I imagine 488 is acceptable. (It's like this because we don't know how accurate we can be with the final answer from the numbers in the question.)
