Take 85 points PLEASE Help Me A galvanic cell consists of an SHE (as the left-hand electrode) with standard potential equals to -0.76 volt. It has a rod of zinc dipping into a solution of zinc ions at 298 K gave measured emf of -0.789volt and s is 0.059.
What is the activity of the zinc ions? use these equation E=E°+s log[ion]​

Ten students stand in a circle and are told to make a transverse wave. what best describes the motion of the students? each student bumps the shoulder of his or her neighbor. at the exact time, all students take a step to the right. the students skip clockwise, going in a circular motion. one at a time, each student lifts his or her hands up and then down.

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

How do we measure or think of speed in the united states?