Amember of the marching band tunes their trombone inside their school. when they walk out to the field the instrument goes out of tune. what is the best explanation for this?
a) the instrument expands or contracts as temperature changes.
b) the speed of sound decreases with a decrease in temperature.
c) walking with the instrument loosens up joints on the instrument.
d) the air outside has a different humidity than the air inside changing the notes.

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:

With i really need the correct answer!

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of