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PLEASE HELP 14 POINT QUESTION
asked
Mar 20, 2020
Mathematics
middle-school
2
answers
2
votes
191k
views
The three forces acting on a hot-air balloon that is moving vertically are its weight, the force due to air resistance and the upthrust force. The hot-air balloon descends vertically at constant speed.
asked
Jan 22, 2019
Physics
middle-school
1
answer
2
votes
51.3k
views
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