Answer:
A magnet
Explanation:
is an object that can attract some metals like iron
Answer:
Explanation:
Given
mass of each car
acceleration of train
Force required to pull this system
For first car
for second car
this form a pattern of the form
for (a)30 th and 31 st car tension
For 49 th and 50 th car
Answer:
Explanation:
The magnetic field can be find using the equation
You can cancel a element of v'
Solve to magnetic field
The charge and mass of the proton are:
,
Replacing numeric