The standard cell potential (E°cell) for the reaction below is +0.63 V. The cell potential for this reaction is V when the concentration of Zn2+ = 1.0 M and the concentration of Pb2+ = 2.0 x 10-4 M.

Pb2+(aq) + Zn(s) ---> Zn2+(aq) + Pb(s)

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .