How could fluid friction be decressed

An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 6.0 v for 0.65 ms. the resistance of the heart muscle between the pacemaker’s electrodes is 550 ω. find (a) the current that flows during a pulse, (b) the energy delivered in one pulse, and (c) the average power supplied by the pacemaker.

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Which model displays the change in a gas when the temperature of the gaseous system decreases?