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

Identify the type of synthetic material used in each object

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.