A power line carries a DC current of 1-23 A in a direction φ = 35° east of magnetic north through an open field. in a location where the Earth's magnetic field is horizontal and its strength is B = 0.57 G -Δ 17% Part (a) Calculate the magnitude of the magnetic force per unit length, F/l, in newtons per meter, exerted on the wire due to the Earth's magnetic ficld Δ 17% Part (b) In what direction does the force on the wire act? -Δ 17% Part (c) You decide to re-orient the wire to minimize the magnetic force acting on the wire. In what direction(s) could the current flow? -Δ 17% Part (e) which of the directions that correctly answer part (d) is the magnetic force on the wire up? -쇼 17% Part (f) If the wire is oriented so that the current flows in the direction you chose for part (e), what would the mass per unit length of the 17 % Part (d) In what direction(s) could you orient the current flow to maximize the magnetic force acting on the wire? wire, fu, in grams per meter, need to be for the magnetic force to balance the weight of the wire?

Two horizontal plates with infinite length and width are separated by a distance h in the z direction. the bottom plate is moving at a velocity u. the incompressible fluid trapped between the plates is moving in the positive x-direction with the bottom plate. align gravity with positive z. assume that the flow is fully-developed and laminar. if the systems operates at steady state and the pressure gradient in x-direction can be ignored, do the following: 1. sketch your system 2. identify the coordinate system to be used. 3. show your coordinates and origin point on the sketch. list all your assumptions. 5. apply the continuity equation to your system. nts of navier stokes equations of choice to your system 7. solve the resulting differential equation to obtain the velocity profile within the system make sure to list your boundary conditions. check units of velocity 8. describe the velocity profile you obtain using engineering terminology. sketch that on the same sketch you provided in (1). 9. obtain the equation that describes the volumetric flow rate in the system. check the units.

Atorque acting on an object tends to produce a. equilibrium b. rotation c. linear motion d. velocity e. a center of gravity

Are formed where bumps from two surfaces come into contact ?