The position of a particle moving along a coordinate line is s equals StartRoot 76 plus 6 t EndRoot, with s in meters and t in seconds. Find the rate of change of the particle's position at t equals 4 sec. The rate of change of the particle's position at t equals 4 sec is 104 4 m divided by sec.

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)