Particles q1, q2, and q3 are in a straight line. Particles q1= -28.1 uc, q2= +25.5 uc, and q3= -47.9 uc. Particles q1 and q2 are separated by 0.300 m. Particles q2 and q3 are separated by 0.300 m. What is the net force on q3?

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2