Aphysicist is constructing a solenoid. she has a roll of insulated copper wire and a power supply. she winds a single layer of the wire on a tube with a diameter of dsolenoid = 10.0 cm. the resulting solenoid is ℓ = 60.0 cm long, and the wire has a diameter of dwire = 0.100 cm. assume the insulation is very thin, and adjacent turns of the wire are in contact. what power (in w) must be delivered to the solenoid if it is to produce a field of 6.40 mt at its center? (the resistivity of copper is 1.70 ✕ 10−8 ω · m.)

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)