Acodec
a. converts binary voice signals into digital signals for transmission
b. encrypts the signal
c. encodes voice sounds into analog signals for transmission
d. encodes voice sounds into digital signals for transmission

Which is not true about oxygen-17 and oxygen-18?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

Which of these statements best explains how the hydrosphere interacts with the atmosphere to affect global climate? mountains block rain clouds and cause changes in global rainfall and evaporation. humans burn fossil fuels to produce greenhouse gases which cause global warming. humans cut down trees which affects the amount of oxygen in different parts of the globe. greenhouse gases, like carbon dioxide, dissolve in oceans and prevent global warming.