The viscous force depends on the coefficient of viscosity, radius of sphere & terminal velocity, Find the expression for the viscous force. Given that the value of dimensonless constant is 6π

Alightning strike consists of charge moving from a cloud to the ground . in one particular case, the electrons in a lightning strike are confined to travel within a radius of 1.5 m and to move at a speed of 5.0 x 10 m/s. if the density of electrons in the strike is 10'15 electrons/m what current is carried by the lightning ?

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

What property of an object determines its inertia?