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A locomotive accelerates a 25-car train along a level track. Every car has a mass of 7.7 ✕ 104 kg and is subject to a friction force f = 250v where the speed v is in meters per second and the force f is
asked
Feb 17, 2020
Physics
college
1
answer
2
votes
137k
views
Why would the church permit cellini's creation of such an erotic piece as the saltcellar?
asked
May 7, 2019
History
high-school
1
answer
4
votes
93.6k
views
Define density and mass
asked
Feb 1, 2019
Chemistry
middle-school
1
answer
5
votes
180k
views
(4s^2 + 2st + t) + (-3s^2 + 5st - 4t) what is the sum of the polynomial?
asked
Jul 10, 2018
Mathematics
middle-school
1
answer
3
votes
171k
views
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