1. Un observateur se place de façon que son seil soit au niveau de la surface du liquide trans-
parent remplissant un réservoir, de parois
opaques, de hauteur 85 cm et de largeur 1,1m.
L'observateur peut alors juste voir le coin C du
réservoir
Trouvez l'indice de
réfraction de ce liquide.​

answer; i believe the correct answer is (40,000 j) good luck

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation:

i believe the answer would be:

d. violin, clarinet, french horn, and tuba