Two charged particles are attached to an x axis: Particle 1 of charge -2.00 *10^7 C is at position x=6.00 cm and particle 2 of charge +2.00*10^7 C is at position x=21.0 cm. Midway between the particles, what is their net electric field in unit-vector notation?

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

Amira pulls a 3 pound wagon 4 feet. how much work has she done?