Earth makes one rotation (2 rad) every 86,400 seconds. The radius of the Earth is 6.371 x 106 meters. Calculate Earth’s angular velocity. What is the expected linear velocity of a person standing at sea level? What keeps us from flying off the surface of the Earth?

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates