The kinetic energy of a proton and that of an a-particle are 4 eV and 1 eV,
respectively. The ratio of the de-Broglie wavelengths associated with
them, will be
(a) 2:1
(b) 1:1
(c) 1:2
(d) 4:1

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

Lightning is an example of what phenomenon? a release of a large amount of energyan absorption of a large amount of energya natural electric circuita natural electric current