An electron and a positron are moving toward each other and each has speed 0.460 c in the lab frame. A. What is the kinetic energy of each particle? Ke-: J, Ke+ J
B. The e+ and e- meet head-on and annihilate. What is the energy of each photon that is produced? Eph: J
C. What is the wavelength of each photon? m

Natural forces that can alter ecosystems include seasons and climate changes. t or f

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

A10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead, which is much denser than aluminum. which one has the greater buoyant force on it? explain. b - the aluminum a) both have the same buoyant force. b) the aluminum c) the lead d) it cannot be determined without knowing their volumes.