Recent content by chem31sa6

f is the frequency produced from the source. fobs is the frequency heard by the observer. Vobs is the velocity of the observer (standing still so it has to be 0). Vs is the velocity of the source, which in this part of the problem is the train which we are told stopped moving. The only thing we...

Well it says to find the numeric value, in hertz, for the frequency of the train whistle fs that you would hear if the train were not moving.

Homework Statement You are standing on a train station platform as a train goes by close to you. As the train approaches, you hear the whistle sound at a frequency of f1 = 92 Hz. As the train recedes, you hear the whistle sound at a frequency of f2 = 79 Hz. Take the speed of sound in air to be...

A sample of argon gas is collected over water at 30.0oC. The level of the water is adjusted until the total pressure in the flask is 771 torr and the volume is 250.0 mL. The vapor pressure of water is 31.8 torr at 30.0oC. A. How many moles of argon are in the flask? B. What is the partial...