Select all that apply. which of the following is true about acids? most acids are sour. most acids corrode metals. every acid contains hydrogen. acids have a ph of greater than 7.

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

What are the north and south poles of a solenoid change with?

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.