Aband director instructs students to play a pitch louder. how will the sound wave change when the band plays the same pitch louder? a) the speed of the sound wave will increase. b) the frequency of the sound wave will increase. c) the wavelength of the sound wave will increase. d) the amplitude of the sound wave will increase.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?