When a steadily flowing gas flows from a larger diameter pipe to a smaller diameter pipe the pressure does not decrease, it increases, do to the smaller volume.
Answer:
Explanation:
Speed is a scalar quantity and it doesn't depend on direction
Speed is the total distance traveled divided by the total time taken
Speed = Total Distance / Total time taken
Given that,
A plane can traveled 3952 km in 3 hours normally.
So, it's normal speed is
Speed = total distance / total time
Speed = 3952 / 3
Speed = 1317.33 km/hr
Now, in cloudy skies it will traveled 184 km less than it's usually distance in the same time range.
Then, we want to find the speed in cloudy skies
Since we know that speed is total distance divide by total time,
We need to know the total distance in cloudy skies
Total distance = Normal distance travelled — delay due to cloudy skies
Total distance. = 3952 - 184
Total distance = 3768 km
Total time = 3 hours
Then,
Speed = total distance / total time
Speed = 3768 / 3
Speed = 1256 km/hr
The speed of the plane in cloudy skies is 1256 km/hr. The speed reduces because it traveled less distance for the same time.
if we are walking on a perfectly smooth ground which has no friction our force would simply cancel out the force reverted by the ground and we would fall.
We need it to help push out feet off the ground
Hope those helps :)