If you drop a tennis ball from a height of 2.1 m and it will bounce back after hitting the floor. a) Estimate the mass of the ball and the height to which it bounces back after hitting the floor. [1 mark] b) What was the total impulse on the ball when it hit the floor

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?