Assume that a 19 cm length of wire is carrying a current perpendicular to a 4.1 T magnetic field and experiences a force of 7.6mN. what is the current in the wire?

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

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.

Awhite-blue star is hotter than a red star. select the best answer from the choices provided true or false