Why is thermal energy produced not generally usable to do work?
1because the thermal energy dissipates too quickly and is not concentrated enough to be used
2because this energy is lost to the universe
3 because thermal energy is a form of energy that cannot be used to do any work
4 because thermal energy does not have the same equivalent to do work as other forms

Why do scientists believe that light is made of streams of particles? scientists believe that light is made of streams of particles because only the presence of photons can explain phenomena observed during experiments on the photoelectric effect. these observations include only some frequencies of light causing the ejection of electrons, no time gap existing between light striking a metal and electrons being ejected, and intensity having no effect on the kinetic energy of the ejected electrons.

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =