1) the strength of an electromagnet can be increased bya. replacing the iron core with a steel coreb. using coils of fewer turns on the electromagnetc. passing a larger current through the electromagnetd. using thinner wire for the coils2) the magnetic field lines in the middle of a current-carrying solenoid area. spiralsb. circlesc. parallel to the axis of the solenoidd. perpendicular to the axis of the solenoid3) two parallel conductors have current flowing through them. in the first instant, the current is flowing in the opposite direction to each other. what are the forces acting on the wires in each case? a. attraction and repulsion respectivelyb. repulsion and attraction respectivelyc. attraction for both casesd. repulsion for both cases

Using coils of fewer turns on the electromagnet

Since you have not included the experiment situation and the data, of course, i can not give you specific details about it. but i can you with this question.1) i will assume that the motion is projectile (parabolic) motion.2) yes, the horizontal distance depends on the horizontal velocity as, naming vx the horizontal velocity and t the time, it is: x = vx × t3) now, observe that the flight time depends on the vertical velocity as, naming voy the initial vertical velocity, t the time and y the vertical distance before reaching the ground: y = yo + voy×t - gt² / 2.the higher the initial vertical velocity (voy) the longer the object will be flying and so t will be higher in the equation for the horizontal distance.that explains the relationship between the horizontal distance and the horizontal velocity.