The assembly is centered on the top of a cart of mass m = 15.9 kg which rolls freely on the horizontal surface. if the system is released from rest, determine the magnitude of the initial acceleration a of the cart and the magnitude of the angular acceleration α of the hoop and semicylinder.

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)

What is a transverse wave? how do the particles in the medium move in relation to the energy of the wave? does this wave require a medium?

Two models of the same compound are shown. in what way is model b better than model a? model b shows the types of elements in the compound, but model a does not. model b shows the three-dimensional shape of the molecule, but model a does not. model b shows how the atoms in the molecule are connected, but model a does not. model b shows the number of atoms of each element in the molecule, but model a does not