Asiren produces a 12,300 hz frequency and an intensity of 2.8x10^-6 w/m^2 at a distance of 10 m. what is the speed of the sound produced by the siren in the at a temp of 25°c?
what is the intensity level in db, at a distance of 10 m from the source?
what would be the intensity and the intensity level at a distance of 1x10^2 m from the siren?
what would be the observed frequency of the siren if the source was approaching the observer at a speed of 40 m/s?

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question: