The right half will be a new bar magnet of 2cm with north pole on the right side and south pole on teh left.
Answer:
Explanation:
Given
mass of rock 
Elevation of Rock 
Distance traveled by rock with time

where, u=initial velocity
t=time
a=acceleration
here initial velocity is zero
when rock is 5 m from ground then it has traveled a distance of 5 m from top because total height is 10 m



velocity at this time



B nitrogen stays in order so it can't change movement
Answer:
áp dụng công thức v = s/t
s là dộ dài qduong
v là vận tốc
t là thời gian
xuyên suốt 2 câu hỏi đều dùng công thức này
Explanation:
The added weight of the sand puts more downward pressure on the wheels contacting the rails, which would cause the trains speed to decrease.