A firecracker of mass M, initially at rest, explodes into two pieces. One piece of mass m moves to the left with a speed v. Write an expression for the speed of the other piece after the explosion.

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

There are weak or strong attractive forces between atoms of liquids with a high viscosity

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.