 # If a train pulls away from the station with an average acceleration of 0.35 m/s^2 how long will it take to reach its top speed of 18 m/s?   ### Another question on Physics Physics, 22.06.2019 15:30
To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin.answer in one word.part bfind e(r), the magnitude of the electric field at distance r from the point charge q.express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q.express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r Physics, 22.06.2019 15:30
The radius of an atom is closest in size to a Physics, 22.06.2019 18:00
Cart a has mass m and is released from rest at a height 2h on a ramp making an angle 2theta with the horizontal. the carts roll toward each other, have a head on collision on the horizontal portion of the ramp and stick together. the masses of the carts whells are neglible as are any friction or drag forces. a) indicate whether the carts remain at rest, move tot he left, or move to the right after the collision and explain. b) consider the time interval from when the two carts are released until just after they collide. for the system consiting of the two carts and earth, indicate whether the total mechanical energy increases, decreases, or remains the same. and why. c) for the system consiting of only the two carts, indicate whether the total mechanical energy increases, decreases, or remains the same. why? Physics, 22.06.2019 18:30
A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?
If a train pulls away from the station with an average acceleration of 0.35 m/s^2 how long will it t...
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