Two long, parallel wires, each having a mass per unit length of 37.5 g/m, are supported in a horizontal plane by strings ℓ = 6.15 cm long. when both wires carry the same current i, the wires repel each other so that the angle between the supporting strings is θ = 16.2°.
speed = (frequency) x (wavelength)
speed = (19 per second) x (7 mm)
speed = (19 x 7) (per second · mm)
speed = 133 mm/sec
or you might want to write speed = 0.133 m/s .
the total energy at any point along the arc of swing of a moving pendulum is always the same number. what changes is how it's divided up between potential and kinetic energy.