You blow across the open mouth of an empty test tube and produce the fundamental standing wave of the air column inside the test tube. the speed of sound in air is 344 m/s and the test tube acts as a stopped pipe. a) if the length of the air column in the test tube is 14.0 cm, what is the frequency of this standing wave? b) what is the frequency of the fundamental standing wave in the air column if the test tube is half-filled with water?

Which statement best explains why an object weight less on mercury than it does on earth

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?