На прямолинейном участке происходит наложение волн, распространяющихся от двух когерентных источников. Амплитуда колебаний волн одинакова.

ответ к заданию по физике
 

Punk rock (C) violent words, reggae and rockabilly were important influences on it, played

very fast and loud, aggressive

Musicians the Sex Pistols, the Clash

Acid rock (B) electronic equipment for light and sound, stadium performances with laser

and other special effects, causing strange sensations of happiness

Musicians Pink Floyd

Roek'n'Rol! (A) electric guitar and drums, a few simple phrases

Musicians Little Richard, Buddy Holly, Chuck Berry, Elvis Presley

Techno (E) a futuristic, machine-made sound

Musicians the Kraftwerk, Prodigy, The Chemical Brothers, Pearl, Jam

Reggae (D) a fast style called "ragga", a heavily accented beat

Musicians Bob Marley

A member of a group	Image	Values/Behaviour
Biker	2- or 3-wheeled motor­ized vehicles	Non-violent
Environmentalist		Deep concern about nature
Hacker		A deep understanding of how com­puters work, can do "magical" things
Hippie		Tolerance (accepting other people as they are), liberal lifestyle
Punk	Leather jackets, brightly coloured hair, shocking way of wearing clothes	Liberal attitude and lifestyle, behav­iour and attitude differ from social norms
Raver		All-night dance parties, thought to be rebellious
Scout		Getting practical skills in ... Loyalty and responsibility
A member of a group	Image	Values/Behaviour
Volunteer		Helping people around
Young farmer		Getting practical skills in ...