A block of wood does not allow any light to be transmitted through it. The block of wood can best be described as A.
opaque.
B.
transparent.
C.
invisible.
D.
translucent.

Ase your answer to this question on the information below. hydrocarbons and fissionable nuclei are among the sources used for the production of energy in the united states. a chemical reaction produces much less energy than a nuclear reaction per mole of reactant. the balanced chemical equation below represents the reaction of one molecule of a hydrocarbon with two molecules of oxygen. chemical equation: ch4 + 2o2 → co2 + 2h2o + 1.48 × 10−18 jthe nuclear equation below represents one of the many possible reactions for one fissionable nucleus. in this equation, x represents a missing product. nuclear equation: write an isotopic notation for the missing product represented by x in the nuclear equation.

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Compare and contrast the bohr model and the electron cloud models of the atom.