What makes 60% of your arm and what makes the other 40%

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

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.

During the past 150 years in the united states, how did energy consumption compare to population growth