Para calcular la altura de un puente sobre el agua de un río, dejamos caer una piedra. Si tarda en llegar al agua tres segundos, ¿cual será la altura?

Iam on that question know can you tell me the answer i am realy strruglingasap

What kind of enegia produces the mixture of bicarbonate and vinegar  chemical producetion

Because its not moving at that time hope u understand

The correct option is this: the sound waves from the two trombones have slightly different frequencies.from the question given above, we are told that the loudness of the sounds were increasing and decreasing, this is because the frequencies of the two sounds are different. the means that the number of waves that pass a fixed point in a given amount of time differ for both sounds.