Which option accurately describes an unbalanced force

each cement block supports a 2 - n force, that's when a foundation is built in a staggered pattern, i can support 2000 n

three rows of cement blocks for a foundation for a house, and the house rests in this foundation

a 2-n force presses don on the cement block at the same time as a 1.5 -n force presses
up on the cement block

the force of a house pressing down on its foundation of cement blocks is 3000n

you!

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