A crane exerts 56,000 Newtons of force over a distance of 4.5 meters. How much power was generated if it took 4.2 seconds to accomplish this?

Calculate the ratio of the speed of propagation of a myelinated neuron to a non-myelinated neuron. The myelinated neuron radius is 6 um and has capacitance per unit area 7 x 10-5 Fm-2 The non-myelinated neuron radius is 1 um and has capacitance per unit area 4 x 10-2 Fm-2

1F IF 6V 6 V 10 (A) (B) Figure 1:

"110V - 220W" is read on an engine. Calculate the resistance that must be connected in series with this motor in order to use it with a potential difference of 200V.

Circuit Problem: Express each labelled voltage and current (e.g., vx, ix) in terms of the resistances and source currents and voltages (e.g., R0).

With the switch open, the potential difference across the capacitor shown is 10.0 V. After the switch is closed, how long will it take for the potential difference across the capacitor to decrease to 5.0 V?