Two children on opposite sides of a 13 kg door (i = 1/3 ml 2 ) apply a force to the door. the first child pushes with force f at an angle of 80° relative to the door at a position r 1 from the door’s hinges. the second child pushes with a force of 15 n perpendicular to the door at a position 0.3 m from the door’s hinges. the width of the door is 0.4 m. what is the door’s angular acceleration?

Work = force × a. work b. energy c. distance d. momentum

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction