Two speakers, A and B, produce
identical sound waves. A listener is
3.20 m from speaker A. The listener
finds the lowest frequency that
creates destructive interference at
his location is 72.4 Hz. How far
away is he from speaker B?
(Hint: v = A f = 343 m/s)
(Unit = m)

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

the right answer is 0.3 meters per second

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.