Heat flows through a wooden board 30mm thick at 0.0086 W/cm^2 , when one of its sides is 20°c warmer than the other . Determine the thermal conductivity of the wood .

There are no negative consequences to using nuclear energy.  false. how is the   the hydrogen bomb relies on the process of nuclear fission. true.

A  reaction  in which  energy  is  released  to the surroundings is called an exothermic  reaction. in this type of  reaction  the enthalpy, or stored  chemical energy, is lower for the products than the reactants. when ammonium nitrate is dissolved in water,  energyis  absorbed  and the water cools.