You hear sounds at the following decibel levels: 5 db, 10 db, 20 db, and 40 db. which sound is 10 times higher than the lowest pressure humans can hear?
40 db
10 db
20 db
5 db

Can you match these to the correct definition

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.