A glider of mass 0.250 kg is placed on a frictionless, horizontal air track. One end of a horizontal spring is attached to the glider, and the other end is attached to the end of the track. When released, the glider oscillates in SHM with frequency 4.40 Hz. A. Find the period of the motion.
B. Find the angular frequency of the motion.
C. Find the force constant k of the spring
D. Find the magnitude of the force that the spring exerts on the glider when the spring is stretched by 0.0200 m.

This is kenetic energy.

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

Ibelieve you go to settings

The shape  of the trajectory of a projectile is a parabola or a curve