Q1. A parallel-plate capacitor is formed from two 2.0 {rm cm} times 2.0 {rm cm} electrodes spaced 5.0 {rm mm} apart. The electric field strength inside capacitor is 1.0 times10^ {6} ;{rm{N/C}}.
What is the charge (in {rm nC}) on positive electrode?
What is the charge (in {rm nC}) on negative electrode?
Q2. A piece of balsa wood with density 0.50g/cm^3 is released under water. What is the initial acceleration?? Repeat for a piece of maple with density 0.760 g/cm^3? Repeat for a ping-pong ball with the average density of 0.127 g/cm^3.