Which voice can produce a pitch that has a speed of 343 m/s and a wavelength of 0.68m?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? ab c d

Language is not the only way that humans communicate. describe how we use sound, touch, chemicals, and sight to communicate. need answer asap