A boat traveling at 4 m/s runs out of fuel, causing the engine to turn off. Because of the drag force Fd= bv with the water, the boat immediately starts to slow down. In this problem we do not know the value of b, but we do know that the speed of the boat has been reduced to 2 m/s exactly 5 seconds after the engine stopped. How far does the boat travel before it comes to a complete stop?

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

Which word expression describes how much to calculate pressure