Answer:
efficiency of a machine is less than 100% because some part is energy is utilized to overcome some opposing forces like friction which is wasted as heat ,sound energy etc
Explanation:
Answer: 1.2 m/s
Explanation:
Velocity
is defined as the variation of position of an object or body in time. So, if we know the distance the seed traveled and the time, we can calculate its velocity:

Where:
is the distance the maple seed traveled
is the time
Then:

This is the seed's velocity
Answer:
The answer is A
Explanation:
Someone shouting to you from across a room