Two of dalton's theories were disproven:
1. all atoms of a given element are the same.
2.atoms can't be divided into smaller pieces.
q: who disproved theory 1?
a: ?
q: who disproved theory 2?
a: j. j. thompson ?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay

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