I don’t know the answer to this so someone please help me. i completely skipped over this

8. why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?