Show that at the bottom of a vertical mine shaft dug to
depthd, the measured value of ag will be
ag = ags(1 - d/r),
ags being the surface value. assume thatearth is a
uniform sphere of radius r.

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Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.