on a smooth plane mirror, if the angle of incidence is 30°, then the angle of reflection is 30° 60°. 90° 15°…

on a smooth plane mirror, if the angle of incidence is 30°, then the angle of reflection is 30° 60°. 90° 15° incandescent lighting is much more energy - efficient than fluorescent lighting. true false what type of chemical reaction begins with a single reactant and produces several products? decomposition single replacement synthesis double replacement

on a smooth plane mirror, if the angle of incidence is 30°, then the angle of reflection is 30° 60°. 90° 15° incandescent lighting is much more energy - efficient than fluorescent lighting. true false what type of chemical reaction begins with a single reactant and produces several products? decomposition single replacement synthesis double replacement

Answer

Explanation:

Step1: Recall the law of reflection

According to the law of reflection, the angle of incidence is equal to the angle of reflection. Given the angle of incidence is (30^{\circ}), so the angle of reflection is also (30^{\circ}).

Step2: Analyze the energy - efficiency of incandescent and fluorescent lighting

Incandescent lighting produces light by heating a filament, and a large amount of energy is wasted as heat. Fluorescent lighting uses less energy to produce the same amount of light. So, incandescent lighting is not more energy - efficient than fluorescent lighting.

Step3: Recall the definition of chemical reactions

A decomposition reaction is a reaction in which a single reactant breaks down into two or more products. A single - replacement reaction is (A + BC\rightarrow AC + B), a synthesis reaction is (A + B\rightarrow AB), and a double - replacement reaction is (AB+CD\rightarrow AD + CB)

Answer:

  1. (30^{\circ})
  2. False
  3. decomposition