The radial pressure gradient force per unit mass at the ground beneath an intens
ID: 283461 • Letter: T
Question
The radial pressure gradient force per unit mass at the ground beneath an intense cylindrical wall cloud is 1.3 m/s2, i.e., the pressure increases away from the center of the wall cloud.
(a). How long (in minutes) will it take an air parcel, starting from rest a distance of 2 km away from the wall cloud along the storm’s inflow tail, to reach the center of the wall cloud? Assume that the parcel moves only horizontally.
(b). How fast will the parcel be traveling when it reaches the center of the wall cloud?
Explanation / Answer
Answer:a
According to the given condition, the pressure increases away from the center therefore the air parcel will reach faster than normal condition because pressure moves from high to low. Hence, by solving with the following equation;
Time= distance covered by air parcel/ speed of air parcel
Answer:b
The speed would be faster than the normal as discussed above and can be computed by the same formula as above.
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