Answer: b) TRUE and d) TRUE
Explanation: a) FALSE the electric field lines are used to represent the charges postives and negatives.
b) TRUE it is the definition of electric field lines , they are tangent to the electric field vector.
c) FALSE the electric field lines only for conductor are perpendicular to the surface in other any situation there is a tangencial electric field components.
d) TRUE since it is a way to describe and imagine the effect of vectorial fields.
e) FALSE
Average speed = (total distance) / (total time to cover the distance)
= (15 km + 33 km) / (1 hr + 2 hrs)
= (48 km) / (3 hrs)
= (48/3) km/hr
= 16 km/hr .
Position <em>' C '</em> is the middle of the swing. That's where the weight is the lowest.
It's also the place where the weight is moving the fastest, so that means it's the place where the kinetic energy is greatest.
2 wheels force is put on the back gear to push a larger gear on front . when pedalling on flat force should be applied on middle to smaller size. However when bike reached a terminal force it rider will move to smaller gear and go faster. If bike is going down hill the force of gravity will mean rider can manage the smallest gear as in fastest speed as Force = Mass × Velocity and the impact of gravity means less force is required as the weight of the bike and rider However the opposite it through for uphill as the rider is going against gravity ..weight and gravity will mean the rider will need to go to the larger gear the slower speed.
There are other factors as in wind and slip stream and type of pedals to maximise the force.
Answer: A
Explanation:i took this one
