Im paying on my phone but dont have full access when i log into computer

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

Ascientist is working with a new kind of quantum dot to make a dye. he is applying newton’s laws to the particle, but it seems to be breaking these laws of physics. which action will most likely the scientist study the particle’s motion? a. he needs to remember that the particle is too large for quantum analysis. b. he must continue to use newtonian mechanics, but he needs to learn more about the particle. c. he needs to use quantum mechanics, not newtonian mechanics, because this is a nanotechnology product. d. he must determine new physical laws that only apply to quantum dots.

Many scientists like to study cosmic objects in the uv spectrum because objects giving off large amounts of uv light are typically and