The spreading out of waves after they pass through a narrow opening is?

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?