This isn’t anything related to physics dude
Answer:
34 m/s
Explanation:
The law of conservation of linear momentum dictates that the sum of initial and final momentum should be equal. Momentum is a product of mass and velocity.
Since the canon recoils, its recoil velocity is opposite hence
MV=nu where M and n are mass of cannon and cannoball respectively, v and u are the velocities of cannon and cannon balls respectively.
Substituting 200 kg for M and 1.7 m/s for v then 10 kg for n
200*1.7=10u
U=200*1.7/10=34 m/s
Answer:
The strength of the magnetic field is 0.0842 mT
Explanation:
Given:
Velocity of rod

Length of rod
m
Induced emf across the rod
V
According to the faraday's law
We have a special case for moving rod in magnetic field.
Induced emf in moving rod is given by,

Where
strength of magnetic field


T
mT
Therefore, the strength of the magnetic field is 0.0842 mT
T=Vf-Vi/s
25m/s -15m/s/ 125m
10m/s /125m
=0.08s
I hope it’s correct !
Answer:
C and D
Explanation:
Charge on right = +0.001 C
Charge on left = 1000 C
Charge held in between = -1C
Ratio between right and left charge:

Which shows charge on left exerts 1,000,000 times more force then charge on right
Charge on left is 1000 times greater in magnitude than charge held between and charge held between is 1000 times greater in magnitude than charge on right. So the magnitude of the force on the charge you are holding would be the same if it were +1 C instead of −1 C.