A vector. This is because the quantity given has a magnitude (20mph) and a direction (North). It is also an example of a velocity.
A velocity vector includes both speed and direction.
First part of the question is 400 miles per hour
Speed or velocity.
About 55 miles per hour.
20 miles per hour north is an example of
30 miles per hour north
We're not completely sure what you mean by "per hour per second". Going just by what we see in the question, it's an acceleration, not a velocity. "Six miles per hour north" would be a velocity.
A vector. This is because the quantity given has a magnitude (20mph) and a direction (North). It is also an example of a velocity.
A velocity vector includes both speed and direction.
(55 miles per hour) is a scalar. (55 miles per hour heading north) is a vector.
Speed.
The velocity of the winds blowing at 89 miles per hour during a storm on the North Carolina coast is 89 miles per hour.
10 miles per hour 100 feet per second $25 per hour etc...
First part of the question is 400 miles per hour
To convert feet per hour to miles per hour, you can use the following conversion factor: 1 mile = 5280 feet. Divide the feet per hour value by 5280 to get the equivalent value in miles per hour. For example, if something is moving at 5280 feet per hour, it is moving at 1 mile per hour.
Speed or velocity.