What do you mean by your question?
The change in direction of a wavepassing from one medium to another caused by its change in speed
The skier has potential because potential energy is enery that is stored or an object that is or does not move
Answer:
The average speed is 3.5 mi/h
Explanation:
Average speed is given by
If the total distance covered is mi,
Then mi was covered while hiking and
mi was covered while running.
Now, we will find the time taken while hiking and the time taken while running
- For the time taken while hiking
Speed = 2.9 mi/h
Distance = mi
From,
Time = h
Time taken while hiking is 0.2299 h
- For the time taken while running
Speed = 5.6 mi/h
Distance = mi
Time = h
Now, for the average speed
Total distance = mi + mi = mi
Total time = + = h
∴
Average speed = 3.4552 mi/h
Average speed ≅ 3.5 mi/h
Answer:
For the first situation, we first need to find the mass of the second train car.
In order to do that, we apply the conservation of the amount of movement:
and we have as a result:
m2 = 289.6875
For the second situation, also we will apply the conservation of the amount of movement:
and we have as a result:
V = 2.64 (it is moving to the right)