Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Hail Speed
Name: Taylor
Status: student
Age: 15
Location: N/A
Country: N/A
Date: 2000-2001


Question:
I was curious as to the speed of hail. Can you tell me the average speed of hail when it is about the size of a golf ball?


Replies:
Taylor,

This took some calculating, which I won't bore you with. I calculated the terminal fall velocity of an ice sphere the size of a golf ball (1.68 inch diameter); it is 1626.5 cm per second (234.7 miles per hour). This is assuming that the hail is a perfect sphere, which it rarely is. Normally hail is gouged out on the top and enlarged on the bottom. More rime collects on the bottom than the top as the hail falls.

David Cook
meteorologist at Argonne Nat. Lab.


Click here to return to the Weather Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory