How did Naya simulate the force exerted on the head?

Which of the following are guidelines to follow for obtaining accurate observations

In what direction does an applied force move an object

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