Any wave of any kind will change direction when it encounters an obstacle. This bending is called Group of answer choices

resonance

the photoelectric effect

interference

diffraction

The answer is  the potential energy of the bob at position b is 1.47 joules.if the maximum height of the bob is 0.45 meters when it swings back,1.323   joules of energy was transformed to thermal energy.hope this

B. that is the answer