The value of gravitational acceleration decreases as we go above the earths surface

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.