Federal crash standards require that a passenger in a typical accident should not experience accelerations of 60 g for longer than 36.0 milliseconds. At what speed did the authors of this standard assume a typical accident would take place? Could you also write down the formula used to find this answer?

Calculate the heat capacity per object when the total energy is 4 quanta. (think of this in terms of increasing from 3.5 quanta of energy in the system to 4.5 quanta of energy in the system, if that were possible.) c4 = __ j/k/object

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)

Which system of units is used by only a small number of countries in the world, including the u.s.