Asound wave of frequency 440 hz travels at a speed of 344m/s through the air in a concert hall. how fast would a note one octave higher, 880hz travel through the same concert hall?

The slope of a velocity time graph over any interval of time gives the during that interval

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.