If one single-bladed propeller is turning at 570 rpm and you hear a 2.20 Hz beat when you run the second propeller, what are the two possible frequencies (in rpm) of the second propeller

What is the increase in density of a medium due to wave travel?

Which of the following is not used to measure wind? oa. psychrometero b. wind socko c. weather vaneo d. anemometer

Mrs. smith does her daily chores. she walks 5 m to the laundry room and then turns around and walks -14 m to the kitchen. the whole process takes her 11 minutes. what was her average velocity for these events? (choose more than 1) a. 1.48 m/s b. 0.212 m/s c. -0.136 m/s d. -0.0075 m/s