What is the separation in meters between two slits for which 613 nm orange light has its first maximum at an angle of 30.4°?

What is the type of the reaction below? bacl2 + h2so4 → 2 hci + baso4 double replacement synthesis single replacement decomposition

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above