Answer:
The correct option is "moving electric charges or currents".
Explanation:
Magnetic field is used to define as a field that surrounds a current carrying conductor or moving electric charge by virtue of which it exerts a force on another current carrying conductor or a moving charge itself.
The magnetic field generated by a moving charge is given by
where
q = is the magnitude of charge
v = is the velocity vector of the moving charge
r = is the position vector of the point at which the field is calculated
|r| = is the magnitude of position vector.
Similar the magnetic field generated by a current carrying conductor is given by
where
I is the current
The integration is carried out along the whole length of conductor.
Also since magnetic mono poles do not exist or their existence is not confirmed until now so it is not an appropriate option.
The answer to this question is option 2
Answer:
three balls have the same speed
Explanation:
In a parabolic motion we have that
but the time just before the balls hit the ground is
Hence we have
ball A
ball B
ball C
Hence, all three balls have the same speed just before hit the groug
vA=vB=vC
I hope this is useful for you
regards
This molecule is formed between a not very electronegative metal and a very electronegative nonmetal which means it should be an ionic compound which would mean that it would have the name of potassium oxide.
look up the naming rules for ionic compounds. I would explain it here but I don't know how to explain naming the anion part of the molecule other than it ends in ide since it is a monoatomic anion which is why oxide is in the name instead of oxygen.
I hope this helps. Let me know if anything is unclear or needs more explanation.
Answer:
Power, P = 112500 watts
Explanation:
It is given that,
Mass of the car, m = 1500 kg
Initial velocity of the car, u = 0
Final velocity of the car, v = 30 m/s
Time taken, t = 6 s
The minimum average power delivered by the engine is given by :
P = W/t
Where
W = work done
t = time taken
Work done = change in kinetic energy
So,
P = 112500 watts
So, the minimum average power delivered by the engine is 112500 watts. Hence, this is the required solution.