Questions with the keyword 'energy'

• why/how Is there an upper limit to the energy of a single photon by leelee1997 to Bev, Posty, Edward, Kate, Nathan . Comments: (No comments so far)
• Which in your opinion is a better way of making renewable energy wind, solar or hydro? by cnixon to Bev, Posty, Edward, Kate, Nathan . Comments: (No comments so far)