An ultrasound system can produce images of body structures because sound waves

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

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.