Física Flashcards
(27 cards)
A prática de golfe em dias chuvosos é perigosa porque…
Não basta que o material seja bom condutor de eletricidade para atrair raios.
EX: taco de golfe levantado-é perigoso em dias chuvosos porque os raios são atraídos pelo caminho de menor resistência até o solo,atingindo altitudes elevadas.
Como a baixa umidade relativa do ar influencia no processo de eletrização
as partículas de água do ar são reduzidas favorecendo o acúmulo de cargas elétricas no corpo das pessoas favorecendo pequenas descargas elétricas devido ao escoamento de cargas quando tocamos em pessoas ou objetos
Interferência parcial ou destrutiva implica a formação de uma onda resultante de menor
Amplitude
What is destructive interference?
Destructive interference occurs when two waves combine to produce a wave of smaller amplitude.
True or False: Destructive interference can completely cancel out a wave.
True.
Fill in the blank: Destructive interference happens when waves are ______ degrees out of phase.
180.
What is the result of two waves of equal amplitude undergoing destructive interference?
The result is a wave with zero amplitude.
Which of the following scenarios can demonstrate destructive interference? A) Sound waves in a concert hall B) Water waves in a pond C) Light waves in a laser
A) Sound waves in a concert hall and B) Water waves in a pond.
What is the condition for two waves to interfere destructively?
The two waves must be out of phase by 180 degrees.
Short answer: How does destructive interference affect sound quality?
It can reduce the overall sound level and create dead spots in sound distribution.
True or False: Destructive interference can occur with all types of waves.
True.
What is the phase difference required for complete destructive interference?
A phase difference of 180 degrees.
Multiple choice: Which phenomenon is an example of destructive interference? A) Noise-canceling headphones B) Echo in a canyon C) Rainbow formation
A) Noise-canceling headphones.
Fill in the blank: The principle of ______ explains how destructive interference works.
superposition.
What is the effect of destructive interference on light waves?
It can cause dark spots or regions of low intensity in patterns.
True or False: Destructive interference can enhance the amplitude of a wave.
False.
Short answer: In what applications is destructive interference beneficial?
It is beneficial in noise-canceling technologies and audio engineering.
What type of wave behavior is demonstrated by destructive interference?
Wave behavior that involves the cancellation of amplitude.
Multiple choice: In which situation would you expect to see destructive interference? A) Two tuning forks playing the same note B) Two speakers playing opposite phase sound C) A single speaker playing a note
B) Two speakers playing opposite phase sound.
Fill in the blank: Destructive interference can be visually represented in ______ patterns.
interference.
What happens to the energy of waves during destructive interference?
The energy is redistributed, resulting in lower intensity in certain areas.
True or False: Destructive interference can be used to improve signal clarity in communication systems.
True.
What is the mathematical representation of the condition for destructive interference?
Path difference = (n + 0.5)λ, where n is an integer and λ is the wavelength.
Short answer: Describe how destructive interference can be demonstrated with water waves.
By creating two sets of waves that meet at a point, resulting in reduced wave height.
