A standing wave of the third overtone is induced in a stopped pipe, 7 m long. The speed of sound is The number of antinodes in the standing wave pattern is:

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.

conduct current i mean it makes sense