3. A source emitting a sound at 300.0 Hz is moving toward an observer at 25m/s The air temperature is 15^circ C What is the frequency detected by the observer? K/U4. How much kinetic energy does a 2 kg toy car have if it is moving at 3m/s 5. Which has the greater effect on the kinetic energy, the mass or the velocity, or are the equal?34. A crane is driven by a lifting motor The motor provides power that can lift a 350 kg object at 8.0m/s . It is observed that in fact the crane lifts a 300 kg concrete block through 25 m vertically in 5.0 s. a) Find the power input of the crane. b) Find the power output of the crane. c) Find the efficiency of the crane.What will be the 3rd harmonic of an open air column that is 66.1 cm long if the speed of sound is 377m/s 856 hz 215 hz 687 hz 442 hzWhat will be the Jid Aarmonic of an open air column that is 66. I cm long if the speed of sound is 377m/s 856 h: 215 hz 637 hz 442 hz -out of 1PREV 121122123124125126127128129 NEXT
