In a mass spectrometer, the electric field between the plates of the velocity selector is 2 x 105 V/m, and the magnetic field is 2.0 T. You are trying to find the mass of a new singly charged positive ion. You discover that a stream these ions, after passing through the velocity selector, moves in a circular path with radius 30.0 cm in the magnetic field. (a) What is the speed of these ions just after passing through the velocity selector

How much work would a child do while puling a 12-kg wagon a distance of 3m with a 22 n force directed 30 degrees with respect to the horizontal? (a) 82j (b) 52j (c) 109j (d) 95j

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.