What is the approximate hydrogen/hydronium ion concentration in a cup of tea? (1 point) What is the approximate hydroxide ion concentration in a cup of tea? (1 point)
Which is higher? (2 points)

What is the approximate hydrogen/hydronium ion concentration in bleach? (1 point)
What is the approximate hydroxide ion concentration in bleach? (1 point)
Which is higher? (2 points)

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?