Explain why charging by friction works better for insulators, while charging by induction works better for conductors

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

Which best represents the law of conservation of mass ?

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat