While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch. Andrea's force is due north with a magnitude of 150.0 N and Jennifer's force is 27° east of north with a magnitude of 190.0 N.
(a) Find the net force (in N) in component form.
(b) Find the magnitude (in N) and direction (in degrees counterclockwise from the east axis) of the net force.
(c) If Andrea and Jennifer's housemates, David and Stephanie, disagree with the move and want to prevent its relocation, with what combined force Fos (in N) should they push so that the couch does not move? (Express your answer in vector form.)

How have the competing explanations' experiments on atoms affected the development of the atomic model?

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.

Why should the wavelength scale of spectroscope be calibrated