The siren on an ambulance is emitting a sound whose frequency is 2450 Hz. The speed of sound is 343 m/s. If the ambulance is stationary and you (the “observer”) are sitting in a parked car, what are the wavelength and the frequency of the sound you
hear? Suppose that the ambulance is moving toward you at a speed of 26.8 m/s. Determine the wavelength and the frequency
of the sound you hear. If the ambulance is moving toward you at a speed of 26.8 m/s and you are moving toward it at a speed
of 14.0 m/s, find the wavelength and frequency of the sound you hear.

Four potential forces can act on the ball. which combination of forces will keep the ball in static equilibrium? the length of the arrows represents the magnitude of the force.

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?