Some people don't think it's a good idea for scientists to bring ancient bacteria back to life. Explain why you think people might be worried about this. Do you think it is a valid concern?

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

How many times did thomas edison mess up the light bulb

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?